🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 157 (from laksa072)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa157.int.ahrefs:8124/' \
  -H 'Content-Type: text/plain' \
  -H 'X-ClickHouse-Database: crawler3' \
  -H 'Authorization: Basic YXBpOg==' \
  -d 'SELECT getAhrefsURLFromUnparsed(src_unparsed) AS found_url, ifNull(toUnixTimestamp(download_stamp), 0) AS crawl_time, ifNull(toUnixTimestamp(props_url_first_seen), 0) AS first_indexed_time, download_http_code AS http_code, src_unparsed AS src_unparsed, src_root_hash AS src_root_hash, history_drop_reason AS history_drop_reason, meta_title AS meta_title, meta_descriptions AS meta_descriptions, attrs_boilerpipe_text AS attrs_boilerpipe_text, attrs_markdown AS attrs_markdown, attrs_readable_markdown AS attrs_readable_markdown, meta_canonical AS meta_canonical FROM crawler3.page_info_local FINAL PREWHERE (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://www.yorktest.com/us/intolerance/shellfish/\')), getAhrefsUnparsedNoserviceFromURL(\'https://www.yorktest.com/us/intolerance/shellfish/\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/www.yorktest.com\/us\/intolerance\/shellfish\/","crawl_time":1775632900,"first_indexed_time":1632557176,"http_code":200,"src_unparsed":"com,yorktest!www,\/us\/intolerance\/shellfish\/ s443","src_root_hash":"6699230915045817157","history_drop_reason":null,"meta_title":"Shellfish Intolerance and Sensitivity | Signs & Symptoms | YorkTest US","meta_descriptions":["Think you are suffering from a shellfish sensitivity? Find out more about the signs and symptoms of shellfish sensitivity and buy our test today..."],"attrs_boilerpipe_text":"Fish and shellfish consumption has seen a steady rise in the past decade as more Americans add it to their diets. Whether it’s a shrimp scampi or a summer clambake, shellfish can be a great way to get Omega-3 and 6 fatty acids into your diet. However, not everyone’s body reacts well to seafood. If you have an intolerance or sensitivity (defined by YorkTest as a food-specific IgG reaction), eating shellfish may actually pose a problem. Could your stomach cramps actually be a sign of shellfish sensitivity?\nWhat causes shellfish intolerance?\nA shellfish intolerance occurs when your digestive system does not have the appropriate enzymes to break down shellfish protein, producing an inflammatory response and difficulty digesting. This is different from a shellfish food allergy, which induces adverse reactions as a result of the body’s immune system. Allergy reactions tend to be more serious and could be life-threatening, especially if they cause an anaphylactic reaction affecting the respiratory system.\nWhilst you need to actually eat shellfish to experience intolerance symptoms, with a shellfish allergy, you can experience symptoms from just touching or cooking shellfish, depending on the severity of the food allergy.\nIt’s also important to note that one-off digestive reactions to shellfish could also stem from food poisoning rather than a food intolerance (if the shellfish is appropriately prepared or not fresh). It is for this reason that it’s a good idea to keep a food diary to monitor offending foods.\nSigns of shellfish intolerance\nShellfish sensitivity intolerance can appear up to 72 hours after eating shellfish and can range from mild symptoms to hypersensitive reactions. If you are suffering from a seafood or shellfish intolerance, it is important to discover which particular seafood is the offending food.\nDigestive symptoms of shellfish sensitivity may include:\nAbdominal pain\nBloating\nNausea\nVomiting\nDiarrhea\nSave\n$60!\nPremium Food Sensitivity Test\n$199\n$139\nSALE: 30% OFF ENDS MONDAY\nFREE shipping\nThe Premium Food Sensitivity Test\nmeasures your IgG reactivity to 200 foods and drinks\n. Get answers on which foods could be triggering your IBS symptoms, headaches, bloating, tiredness, and more.  Simply collect your finger-prick blood sample at home. Mail it to our laboratory for testing. Then receive your results online within 7 days!\n200 ingredients tested\nTests are HSA and FSA accepted\nAnalyzed in our accredited laboratory\nClear, color-coded results show your IgG reactivity score for each ingredient\nNutritional Therapist Consultation available to advise and support your dietary changes\nCustomers must be aged 18 years or over to take this test. For under 18s, take our\nJunior Food Sensitivity Test\n. This test is not available to customers who are pregnant or breastfeeding.\nTesting for Shellfish Sensitivity\nTo determine if your symptoms are related to a shellfish sensitivity, we recommend taking a\nfood sensitivity test.\nThis will help identify if a shellfish sensitivity is the cause of your discomfort and whether other ingredients are also affecting you at meal times. At YorkTest, we analyze your\nIgG antibodies\n1-4 through a finger-prick blood sample: one of the most accurate methods of testing available. \nThe blood test looks at over 200 ingredients that may trigger food sensitivities and their severity in an easy-to-understand traffic light system. Once you have your results, our team can help guide you to understand your food sensitivities, as well as advise you on your food and wellness journey.\nWhere to Look for Shellfish\nAlthough there are easy ways to avoid eating shellfish, it’s still very important to read through food labels to fully avoid any accidental seafood consumption.\nMake sure to familiarize yourself with the various types of seafood and shellfish below if you have a shellfish sensitivity:\nWhite fish\n: Examples include cod, plaice, sole, coley, haddock, pollock, and monkfish.\nOily fish\n: Mackerel, tuna, sardines, anchovies, salmon, pilchards, herring, and trout.\nMollusks\n: Clams, mussels, oysters, snails, scallops, squid, and octopus.\nCrustaceans\n: Shrimp, crab, lobster, and crayfish.\nFood swaps when you have a shellfish sensitivity\nThe USDA recommends eating around 8 ounces of seafood a week as part of a balanced diet. This is because seafood and shellfish contain a range of good nutrients, such as the omega-3 fatty acids, EPA and DHA, which can be found most notably in oysters (amongst other fish).\nTo make sure you don’t miss out on these nutrients, try including the following food swaps for a healthy diet:\nLeafy greens such as spinach.\nAvocado.\nWalnuts, brazil nuts, hazelnuts, and pecans.\nOlive oil and flaxseed oil.\nEggs.\nSesame butter, and pumpkin seed butter.\nTofu.\nCoconut oil.\nIf you suspect you have an underlying food sensitivity to shellfish, a\n Premium Food Sensitivity Test\n  may help you gain back control of your health and relationship with food. With your test results in hand and in line with professional medical advice, you can find a successful diet that helps put your digestive system at ease. YorkTest’s\n nutritional therapists\n can also help you take out the guesswork and optimise your daily food choices.\nCase Studies\nHelen Dudson\nSymptoms \nEczema, bloating and discomfort\nRead More\nJohn Mudge\nSymptoms \nNausea and silent reflux\nRead More\nPeter Vincent\nSymptoms \nBloating, reflux and stomach issues\nRead More\nDavid Brown\nI am a different person and the brain fog, anxiety and depression have now disappeared. I feel reborn and finally have my life back\nSymptoms \nFatigue, anxiety\nRead More\nKate Evans\nSymptoms \nStomach issues and bloating\nRead More","attrs_markdown":"[Skip to content](https:\/\/www.yorktest.com\/us\/intolerance\/shellfish\/#main)\n\n- [Corporate](https:\/\/www.yorktest.com\/us\/corporate-health-wellness\/)\n- [Practitioners](https:\/\/www.yorktest.com\/us\/us-practitioners\/)\n- [Contact Us](https:\/\/www.yorktest.com\/us\/contact-us\/)\n- [Log In](https:\/\/wellnesshub.yorktest.com\/us)\n- [0 Cart](https:\/\/www.yorktest.com\/us\/basket)\n\n[![](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/yorktest-logo-1.svg)](https:\/\/www.yorktest.com\/us)\n\n- [Tests](https:\/\/www.yorktest.com\/us\/products\/)\n  - [Our Tests](https:\/\/www.yorktest.com\/us\/products\/)\n  - [Premium Food Sensitivity Test](https:\/\/www.yorktest.com\/us\/products\/premium-food-sensitivity\/)\n  - [Premium Nutrition Program](https:\/\/www.yorktest.com\/us\/products\/premium-nutrition-program\/)\n  - [Food Allergy Test](https:\/\/www.yorktest.com\/us\/products\/food-allergy-test\/)\n  - [Food Sensitivity & Allergy Test](https:\/\/www.yorktest.com\/us\/products\/food-sensitivity-and-allergy-test\/)\n  - [Junior Food Sensitivity Test](https:\/\/www.yorktest.com\/us\/products\/foodscan-junior-test\/)\n  - [Couples Food Sensitivity Test](https:\/\/www.yorktest.com\/us\/products\/couples-food-sensitivity-test\/)\n  - [Parent & Child Food Sensitivity Test](https:\/\/www.yorktest.com\/us\/products\/child-and-parent-food-sensitivity-test\/)\n  - [View All Tests](https:\/\/www.yorktest.com\/us\/products)\n  \n  - [Nutrition Services](https:\/\/www.yorktest.com\/us\/product-category\/nutrition-services\/)\n  - [Nutritional Therapist Consultation (30 minute)](https:\/\/www.yorktest.com\/us\/products\/nutritional-therapist-consultation\/)\n  - [View All Nutrition Services](https:\/\/www.yorktest.com\/us\/product-category\/nutrition-services\/)\n  \n  - [Our Tests](https:\/\/www.yorktest.com\/us\/products\/)\n  - [![View All Tests](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/YorkTest-Lab-57-of-122-min.jpg) View All Tests](https:\/\/www.yorktest.com\/us\/products\/)\n- [Our Testing](https:\/\/www.yorktest.com\/us\/how-it-works\/)\n  - [Our Testing](https:\/\/www.yorktest.com\/us\/how-it-works\/)\n  - [Taking The Test](https:\/\/www.yorktest.com\/us\/taking-the-test\/)\n  - [The Science](https:\/\/www.yorktest.com\/us\/how-it-works\/the-science\/)\n  - [The Lab](https:\/\/www.yorktest.com\/us\/the-lab\/)\n  - [How It Works](https:\/\/www.yorktest.com\/us\/how-it-works\/)\n  \n  - [![How It Works](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/YorkTest-Lab-107-of-122-1-1-1024-2.jpg) How It Works](https:\/\/www.yorktest.com\/us\/how-it-works\/)\n  - [Find Out More](https:\/\/www.yorktest.com\/us\/how-it-works\/)\n  \n  - [![Case Studies](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/3-imagex2-1-min.jpg) Case Studies](https:\/\/www.yorktest.com\/us\/case-study\/)\n  - [View Case Studies](https:\/\/www.yorktest.com\/us\/case-study\/)\n- [Advice](https:\/\/www.yorktest.com\/us\/advice-hub\/)\n- [About Us](https:\/\/www.yorktest.com\/us\/about-us\/)\n  - [About Us](https:\/\/www.yorktest.com\/us\/about-us\/)\n  - [Case Studies](https:\/\/www.yorktest.com\/us\/case-study\/)\n  - [Contact Us](https:\/\/www.yorktest.com\/us\/contact-us\/)\n  \n  - [![Why Choose YorkTest](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/YorkTest-Lab-57-of-122-min.jpg) Why Choose YorkTest](https:\/\/www.yorktest.com\/us\/why-choose-yorktest\/)\n  - [Find Out More](https:\/\/www.yorktest.com\/us\/why-choose-yorktest\/)\n  \n  - [![Contact Us](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/york-test-office-10-of-19-1@2x.jpg) Contact Us](https:\/\/www.yorktest.com\/us\/contact-us\/)\n  - [Contact Us](https:\/\/www.yorktest.com\/us\/contact-us\/)\n\n[![](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/yorktest-logo-1.svg)](https:\/\/www.yorktest.com\/us)\n\n[Cart icon 0](https:\/\/www.yorktest.com\/us\/basket\/)\n\n- Main Menu\n  Close mobile menu\n\n[SALE \\| 30% OFF \\| FREE SHIPPING](https:\/\/www.yorktest.com\/us\/products)   [Shop Now](https:\/\/www.yorktest.com\/us\/products)\n\n[Home](https:\/\/www.yorktest.com\/us) \\> [Types Of Food Intolerance \\| Problem foods \\| yorktest](https:\/\/www.yorktest.com\/us\/intolerance\/) \\> Shellfish Intolerance and Sensitivity\n\n# Shellfish Sensitivity and Intolerance\nFish and shellfish consumption has seen a steady rise in the past decade as more Americans add it to their diets. Whether it’s a shrimp scampi or a summer clambake, shellfish can be a great way to get Omega-3 and 6 fatty acids into your diet. However, not everyone’s body reacts well to seafood. If you have an intolerance or sensitivity (defined by YorkTest as a food-specific IgG reaction), eating shellfish may actually pose a problem. Could your stomach cramps actually be a sign of shellfish sensitivity?\n\n![](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/seafood-problem.jpg)\n\n## **What causes shellfish intolerance?**\nA shellfish intolerance occurs when your digestive system does not have the appropriate enzymes to break down shellfish protein, producing an inflammatory response and difficulty digesting. This is different from a shellfish food allergy, which induces adverse reactions as a result of the body’s immune system. Allergy reactions tend to be more serious and could be life-threatening, especially if they cause an anaphylactic reaction affecting the respiratory system.\n\nWhilst you need to actually eat shellfish to experience intolerance symptoms, with a shellfish allergy, you can experience symptoms from just touching or cooking shellfish, depending on the severity of the food allergy.\n\nIt’s also important to note that one-off digestive reactions to shellfish could also stem from food poisoning rather than a food intolerance (if the shellfish is appropriately prepared or not fresh). It is for this reason that it’s a good idea to keep a food diary to monitor offending foods.\n\n## **Signs of shellfish intolerance**\nShellfish sensitivity intolerance can appear up to 72 hours after eating shellfish and can range from mild symptoms to hypersensitive reactions. If you are suffering from a seafood or shellfish intolerance, it is important to discover which particular seafood is the offending food.\n\nDigestive symptoms of shellfish sensitivity may include:\n\n- Abdominal pain\n- Bloating\n- Nausea\n- Vomiting\n- Diarrhea\n\nSave   \\$60\\!\n\n![](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/Premium-food-sensitivity-test-co.png)\n\n## Premium Food Sensitivity Test\n\\$199   \\$139\n\nSALE: 30% OFF ENDS MONDAY\n\n##### **FREE shipping**\nThe Premium Food Sensitivity Test **measures your IgG reactivity to 200 foods and drinks**. Get answers on which foods could be triggering your IBS symptoms, headaches, bloating, tiredness, and more. Simply collect your finger-prick blood sample at home. Mail it to our laboratory for testing. Then receive your results online within 7 days\\!\n\n- 200 ingredients tested\n- Tests are HSA and FSA accepted\n- Analyzed in our accredited laboratory\n- Clear, color-coded results show your IgG reactivity score for each ingredient\n- Nutritional Therapist Consultation available to advise and support your dietary changes\n\n*Customers must be aged 18 years or over to take this test. For under 18s, take our* [*Junior Food Sensitivity Test*](https:\/\/www.yorktest.com\/us\/products\/foodscan-junior-test\/)*. This test is not available to customers who are pregnant or breastfeeding.*\n\n[Read More](https:\/\/www.yorktest.com\/us\/products\/premium-food-sensitivity\/)   [Buy Now](https:\/\/www.yorktest.com\/us\/intolerance\/shellfish\/?add-to-cart=62)\n\n## Testing for Shellfish Sensitivity\nTo determine if your symptoms are related to a shellfish sensitivity, we recommend taking a [food sensitivity test.](https:\/\/www.yorktest.com\/us\/products\/premium-food-sensitivity\/) This will help identify if a shellfish sensitivity is the cause of your discomfort and whether other ingredients are also affecting you at meal times. At YorkTest, we analyze your [IgG antibodies](https:\/\/www.yorktest.com\/us\/what-is-igg\/) 1-4 through a finger-prick blood sample: one of the most accurate methods of testing available.\n\nThe blood test looks at over 200 ingredients that may trigger food sensitivities and their severity in an easy-to-understand traffic light system. Once you have your results, our team can help guide you to understand your food sensitivities, as well as advise you on your food and wellness journey.\n\n## Where to Look for Shellfish\nAlthough there are easy ways to avoid eating shellfish, it’s still very important to read through food labels to fully avoid any accidental seafood consumption.\n\nMake sure to familiarize yourself with the various types of seafood and shellfish below if you have a shellfish sensitivity:\n\n- **White fish**: Examples include cod, plaice, sole, coley, haddock, pollock, and monkfish.\n- **Oily fish**: Mackerel, tuna, sardines, anchovies, salmon, pilchards, herring, and trout.\n- **Mollusks**: Clams, mussels, oysters, snails, scallops, squid, and octopus.\n- **Crustaceans**: Shrimp, crab, lobster, and crayfish.\n\n![](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/shutterstock_1028320018-1-1024x6-1.jpg)\n\n## Food swaps when you have a shellfish sensitivity\nThe USDA recommends eating around 8 ounces of seafood a week as part of a balanced diet. This is because seafood and shellfish contain a range of good nutrients, such as the omega-3 fatty acids, EPA and DHA, which can be found most notably in oysters (amongst other fish).\n\nTo make sure you don’t miss out on these nutrients, try including the following food swaps for a healthy diet:\n\n- Leafy greens such as spinach.\n- Avocado.\n- Walnuts, brazil nuts, hazelnuts, and pecans.\n- Olive oil and flaxseed oil.\n- Eggs.\n- Sesame butter, and pumpkin seed butter.\n- Tofu.\n- Coconut oil.\n\n![](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/Fresh-strawberry-and-avocado-sal-3.jpg)\n\nIf you suspect you have an underlying food sensitivity to shellfish, a [Premium Food Sensitivity Test](https:\/\/www.yorktest.com\/us\/products\/premium-food-sensitivity\/) may help you gain back control of your health and relationship with food. With your test results in hand and in line with professional medical advice, you can find a successful diet that helps put your digestive system at ease. YorkTest’s [nutritional therapists](https:\/\/www.yorktest.com\/our-experts\/) can also help you take out the guesswork and optimise your daily food choices.\n\n![](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/cathryn-lavery-67852-unsplash-1-2.jpg)\n\n[![oat-problem](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/oat-problem.jpg) Oat Find Out More](https:\/\/www.yorktest.com\/intolerance\/oat)\n\n[![shutterstock\\_482016079-1-1024x68 (2)](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/shutterstock_482016079-1-1024x68-2-1.jpg) Yeast Find Out More](https:\/\/www.yorktest.com\/intolerance\/yeast)\n\n[![gluten-intolerance-in-bread-e152](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/gluten-intolerance-in-bread-e152.jpg) Gluten Find Out More](https:\/\/www.yorktest.com\/intolerance\/gluten)\n\n[![Yeast-in-Alcohol-1024x576 (1)](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/Yeast-in-Alcohol-1024x576-1-1.jpg) Alcohol Find Out More](https:\/\/www.yorktest.com\/intolerance\/alcohol)\n\n[![dairy-problem](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/dairy-problem.png) Dairy Find Out More](https:\/\/www.yorktest.com\/intolerance\/dairy)\n\n[![Depositphotos\\_65817401\\_l-2015-10 (1)](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/Depositphotos_65817401_l-2015-10-1.jpg) Wheat Find Out More](https:\/\/www.yorktest.com\/intolerance\/wheat)\n\n## Case Studies\n![Helen Dudson Profile](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/Helen-Dudson-Picture-768x768.jpeg)\n\n### Helen Dudson\n**Symptoms** Eczema, bloating and discomfort\n\n[Read More](https:\/\/www.yorktest.com\/us\/case-study\/helen-dudson\/)\n\n![John Mudge Profile](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/John-Mudge-Profile-768x983.jpg)\n\n### John Mudge\n**Symptoms** Nausea and silent reflux\n\n[Read More](https:\/\/www.yorktest.com\/us\/case-study\/john-mudge\/)\n\n![Peter Vincent Profile](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/Peter-Vincent-scaled-1-768x1152.jpg)\n\n### Peter Vincent\n**Symptoms** Bloating, reflux and stomach issues\n\n[Read More](https:\/\/www.yorktest.com\/us\/case-study\/peter-vincent\/)\n\n![david and michelle case study](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/always-tired-depression-david.jpg)\n\n### David Brown\nI am a different person and the brain fog, anxiety and depression have now disappeared. I feel reborn and finally have my life back\n\n**Symptoms** Fatigue, anxiety\n\n[Read More](https:\/\/www.yorktest.com\/us\/case-study\/david-brown\/)\n\n![Kate Evans Profile](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/Kate-Evans-768x960.jpg)\n\n### Kate Evans\n**Symptoms** Stomach issues and bloating\n\n[Read More](https:\/\/www.yorktest.com\/us\/case-study\/kate-evans\/)\n\n## You might be interested in\nSave\n\n\\$60\n\n\\!\n\n[![Premium Food Sensitivity Test](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/Premium-food-sensitivity-test-co-600x600-c-default.png)](https:\/\/www.yorktest.com\/us\/products\/premium-food-sensitivity\/)\n\n### [Premium Food Sensitivity Test](https:\/\/www.yorktest.com\/us\/products\/premium-food-sensitivity\/)\nAnalyzes your reactivity to 200 food and drink ingredients. Ideal if suffering from IBS, headaches, bloating, skin issues and tiredness.\n\n\\$199\n\n\\$139\n\n[View Test](https:\/\/www.yorktest.com\/us\/products\/premium-food-sensitivity\/)\n\nSave\n\n\\$102\n\n\\!\n\n[![Food Sensitivity & Allergy Test](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/Prem-sensitivity-food-allergy-US-600x600-c-default.png)](https:\/\/www.yorktest.com\/us\/products\/food-sensitivity-and-allergy-test\/)\n\n### [Food Sensitivity & Allergy Test](https:\/\/www.yorktest.com\/us\/products\/food-sensitivity-and-allergy-test\/)\nUnsure if you have a food sensitivity or a food allergy? Many people believe that they are the same thing,…\n\n\\$339\n\n\\$237\n\n[View Test](https:\/\/www.yorktest.com\/us\/products\/food-sensitivity-and-allergy-test\/)\n\nSave\n\n\\$69\n\n\\!\n\n[![Premium Nutrition Program](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/Premium-Nutrition-Plan-600x600-c-default.jpg)](https:\/\/www.yorktest.com\/us\/products\/premium-nutrition-program\/)\n\n### [Premium Nutrition Program](https:\/\/www.yorktest.com\/us\/products\/premium-nutrition-program\/)\nStart your Premium Nutrition Program today with one of our qualified diet & nutrition experts. Includes a Premium Food Sensitivity…\n\n\\$229\n\n\\$160\n\n[View Test](https:\/\/www.yorktest.com\/us\/products\/premium-nutrition-program\/)\n\nSave\n\n\\$102\n\n\\!\n\n[![Couples Food Sensitivity Test](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/Couples-food-sensitivity-test-co-600x600-c-default.png)](https:\/\/www.yorktest.com\/us\/products\/couples-food-sensitivity-test\/)\n\n### [Couples Food Sensitivity Test](https:\/\/www.yorktest.com\/us\/products\/couples-food-sensitivity-test\/)\nOptimize your health together, try a test with your partner, family or a friend.\n\n\\$339\n\n\\$237\n\n[View Test](https:\/\/www.yorktest.com\/us\/products\/couples-food-sensitivity-test\/)\n\nSave\n\n\\$60\n\n\\!\n\n[![Junior Food Sensitivity Test](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/Junior-food-sensitivity-test-600x600-c-default.png)](https:\/\/www.yorktest.com\/us\/products\/foodscan-junior-test\/)\n\n### [Junior Food Sensitivity Test](https:\/\/www.yorktest.com\/us\/products\/foodscan-junior-test\/)\nTests for more than 100 ingredients. Ideal for children over 2 years old. Includes a food diary and guidebook.\n\n\\$199\n\n\\$139\n\n[View Test](https:\/\/www.yorktest.com\/us\/products\/foodscan-junior-test\/)\n\n## Related Articles\n[![Stress and Menstrual Cycles: Can Stress Delay Your Period?](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/Depositphotos_147829583_xl-2015-1-1-1024x474-2-768x356.jpg) Stress and Menstrual Cycles: Can Stress Delay Your Period?](https:\/\/www.yorktest.com\/us\/blog\/stress-and-menstrual-cycles-can-stress-delay-your-period\/)\n\n[![Average Testosterone Levels by Age and Their Impact on Health](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/Testosterone-by-age-768x512.jpeg) Average Testosterone Levels by Age and Their Impact on Health](https:\/\/www.yorktest.com\/us\/blog\/average-testosterone-levels-by-age-and-their-impact-on-health\/)\n\n[![What Is A Food Sensitivity Test and How Can It Improve Your Well-Being?](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/Premium-Food-Sensitivity-Test-Corporate-Wellness-Banner-1024-%C3%97-788-px-1-768x591.png) What Is A Food Sensitivity Test and How Can It Improve Your Well-Being?](https:\/\/www.yorktest.com\/us\/blog\/what-is-a-food-sensitivity-test-and-how-can-it-improve-your-well-being\/)\n\n[![Navigating Celiac Disease - Screening, Diagnosis, and Dietary Decisions](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/Gluten-Intolerance-vs-Wheat-Sensitivity-vs-Celiac-Disease-768x576.png) Navigating Celiac Disease – Screening, Diagnosis, and Dietary Decisions](https:\/\/www.yorktest.com\/us\/blog\/navigating-celiac-disease-screening-diagnosis-and-dietary-decisions\/)\n\nYorkTest is an award-winning food sensitivity & allergy testing company, supporting you to optimize your health and wellbeing with our home-to-laboratory tests. **\\* Disclaimer** YorkTest food sensitivity test results are provided for informational purposes only and are not a substitute for professional medical advice. The results cannot be used to diagnose, treat or cure medical or health conditions. If you are concerned about your symptoms then please contact your medical provider. Information on this website is for educational purposes only and you must never disregard professional medical advice or delay in seeking it based on the information provided here. YorkTest define Food Intolerance as a food-specific IgG reaction. The YorkTest food sensitivity test is not an allergy, celiac or lactose intolerance test. YorkTest tests are not offered in New York state. YorkTest Laboratories’ ELISA analyses are designed to assay specific IgG (subclasses 1, 2, 3, 4) antibodies. The scoring of 0 to 100 provides an indication of the level of IgG antibodies detected through spectrophotometric analysis. The antigens on the panel are subject to change without prior notice. This test was developed and its performance characteristics determined by YorkTest Laboratories. Test methodology has not been cleared or approved by the U.S. Food and Drug Administration. 82% of customers reported that their YorkTest Laboratories test had a positive impact on their health and wellbeing. Figure taken from STRAT7 researchbods survey 2021 (n=565).\n\n### Quick Links\n- [Corporate Health & Wellbeing](https:\/\/www.yorktest.com\/us\/corporate-health-wellness\/)\n- [Practitioners](https:\/\/www.yorktest.com\/us\/us-practitioners\/)\n- [Terms & Conditions](https:\/\/www.yorktest.com\/us\/terms-and-conditions\/)\n- [Privacy Policy](https:\/\/www.yorktest.com\/us\/privacy-policy\/)\n- [Glossary](https:\/\/www.yorktest.com\/us\/glossary\/)\n- [Delivery Information](https:\/\/www.yorktest.com\/us\/delivery-information\/)\n- [FSA & HSA](https:\/\/www.yorktest.com\/us\/fsa-and-hsa\/)\n- [Careers](https:\/\/www.yorktest.com\/us\/careers\/)\n- [Authors](https:\/\/www.yorktest.com\/us\/authors\/)\n\n### Tests\n- [Premium Food Sensitivity Test](https:\/\/www.yorktest.com\/us\/products\/premium-food-sensitivity\/)\n- [Food Allergy Test](https:\/\/www.yorktest.com\/us\/products\/food-allergy-test\/)\n- [Food Sensitivity & Allergy Test](https:\/\/www.yorktest.com\/us\/products\/food-sensitivity-and-allergy-test\/)\n- [Junior Food Sensitivity Test](https:\/\/www.yorktest.com\/us\/products\/foodscan-junior-test\/)\n- [Premium Nutrition Program](https:\/\/www.yorktest.com\/us\/products\/premium-nutrition-program\/)\n\n### Contact\n[\\[email protected\\]](https:\/\/www.yorktest.com\/cdn-cgi\/l\/email-protection#b2d1dedbd7dcc69cc1c7c2c2ddc0c6f2cbddc0d9c6d7c1c69cd1dddf)\n\n### Payment Options\n![](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/visa_logo-2-1.svg)\n\n![](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/mastercard_logo-2-1.svg)\n\n![](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/american_express-1.svg)\n\n![](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/paypal-icon-1.svg)\n\n![](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/google-pay-seeklogo-2.svg)\n\n![](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/apple-pay-2.svg)\n\n### Certification & Verification\n![](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/10\/iso-9001-2015-logo.jpg)  [![](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/Verified-2024-png.png)](https:\/\/hub.registrarcorp.com\/fda-md-reg\/df591f7e)\n\n### Follow Us\n- [Facebook profile\"l](https:\/\/www.facebook.com\/yorktestUSA)\n- [Instagram profile](https:\/\/www.instagram.com\/yorktestusa)\n- [LinkedIn profile](https:\/\/www.linkedin.com\/company\/yorktest-laboratories\/)\n\n© YorkTest 2026   YorkTest Laboratories Inc\n\n![fbpx](https:\/\/www.facebook.com\/tr?id=279555275712259&ev=PageView&noscript=1)","attrs_readable_markdown":"Fish and shellfish consumption has seen a steady rise in the past decade as more Americans add it to their diets. Whether it’s a shrimp scampi or a summer clambake, shellfish can be a great way to get Omega-3 and 6 fatty acids into your diet. However, not everyone’s body reacts well to seafood. If you have an intolerance or sensitivity (defined by YorkTest as a food-specific IgG reaction), eating shellfish may actually pose a problem. Could your stomach cramps actually be a sign of shellfish sensitivity?\n\n![](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/seafood-problem.jpg)\n\n## **What causes shellfish intolerance?**\nA shellfish intolerance occurs when your digestive system does not have the appropriate enzymes to break down shellfish protein, producing an inflammatory response and difficulty digesting. This is different from a shellfish food allergy, which induces adverse reactions as a result of the body’s immune system. Allergy reactions tend to be more serious and could be life-threatening, especially if they cause an anaphylactic reaction affecting the respiratory system.\n\nWhilst you need to actually eat shellfish to experience intolerance symptoms, with a shellfish allergy, you can experience symptoms from just touching or cooking shellfish, depending on the severity of the food allergy.\n\nIt’s also important to note that one-off digestive reactions to shellfish could also stem from food poisoning rather than a food intolerance (if the shellfish is appropriately prepared or not fresh). It is for this reason that it’s a good idea to keep a food diary to monitor offending foods.\n\n## **Signs of shellfish intolerance**\nShellfish sensitivity intolerance can appear up to 72 hours after eating shellfish and can range from mild symptoms to hypersensitive reactions. If you are suffering from a seafood or shellfish intolerance, it is important to discover which particular seafood is the offending food.\n\nDigestive symptoms of shellfish sensitivity may include:\n\n- Abdominal pain\n- Bloating\n- Nausea\n- Vomiting\n- Diarrhea\n\nSave   \\$60\\!\n\n![](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/Premium-food-sensitivity-test-co.png)\n\n## Premium Food Sensitivity Test\n\\$199   \\$139\n\nSALE: 30% OFF ENDS MONDAY\n\n##### **FREE shipping**\nThe Premium Food Sensitivity Test **measures your IgG reactivity to 200 foods and drinks**. Get answers on which foods could be triggering your IBS symptoms, headaches, bloating, tiredness, and more. Simply collect your finger-prick blood sample at home. Mail it to our laboratory for testing. Then receive your results online within 7 days\\!\n\n- 200 ingredients tested\n- Tests are HSA and FSA accepted\n- Analyzed in our accredited laboratory\n- Clear, color-coded results show your IgG reactivity score for each ingredient\n- Nutritional Therapist Consultation available to advise and support your dietary changes\n\n*Customers must be aged 18 years or over to take this test. For under 18s, take our* [*Junior Food Sensitivity Test*](https:\/\/www.yorktest.com\/us\/products\/foodscan-junior-test\/)*. This test is not available to customers who are pregnant or breastfeeding.*\n\n## Testing for Shellfish Sensitivity\nTo determine if your symptoms are related to a shellfish sensitivity, we recommend taking a [food sensitivity test.](https:\/\/www.yorktest.com\/us\/products\/premium-food-sensitivity\/) This will help identify if a shellfish sensitivity is the cause of your discomfort and whether other ingredients are also affecting you at meal times. At YorkTest, we analyze your [IgG antibodies](https:\/\/www.yorktest.com\/us\/what-is-igg\/) 1-4 through a finger-prick blood sample: one of the most accurate methods of testing available.\n\nThe blood test looks at over 200 ingredients that may trigger food sensitivities and their severity in an easy-to-understand traffic light system. Once you have your results, our team can help guide you to understand your food sensitivities, as well as advise you on your food and wellness journey.\n\n## Where to Look for Shellfish\nAlthough there are easy ways to avoid eating shellfish, it’s still very important to read through food labels to fully avoid any accidental seafood consumption.\n\nMake sure to familiarize yourself with the various types of seafood and shellfish below if you have a shellfish sensitivity:\n\n- **White fish**: Examples include cod, plaice, sole, coley, haddock, pollock, and monkfish.\n- **Oily fish**: Mackerel, tuna, sardines, anchovies, salmon, pilchards, herring, and trout.\n- **Mollusks**: Clams, mussels, oysters, snails, scallops, squid, and octopus.\n- **Crustaceans**: Shrimp, crab, lobster, and crayfish.\n\n![](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/shutterstock_1028320018-1-1024x6-1.jpg)\n\n## Food swaps when you have a shellfish sensitivity\nThe USDA recommends eating around 8 ounces of seafood a week as part of a balanced diet. This is because seafood and shellfish contain a range of good nutrients, such as the omega-3 fatty acids, EPA and DHA, which can be found most notably in oysters (amongst other fish).\n\nTo make sure you don’t miss out on these nutrients, try including the following food swaps for a healthy diet:\n\n- Leafy greens such as spinach.\n- Avocado.\n- Walnuts, brazil nuts, hazelnuts, and pecans.\n- Olive oil and flaxseed oil.\n- Eggs.\n- Sesame butter, and pumpkin seed butter.\n- Tofu.\n- Coconut oil.\n\n![](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/Fresh-strawberry-and-avocado-sal-3.jpg)\n\nIf you suspect you have an underlying food sensitivity to shellfish, a [Premium Food Sensitivity Test](https:\/\/www.yorktest.com\/us\/products\/premium-food-sensitivity\/) may help you gain back control of your health and relationship with food. With your test results in hand and in line with professional medical advice, you can find a successful diet that helps put your digestive system at ease. YorkTest’s [nutritional therapists](https:\/\/www.yorktest.com\/our-experts\/) can also help you take out the guesswork and optimise your daily food choices.\n\n![](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/cathryn-lavery-67852-unsplash-1-2.jpg)\n\nCase Studies\n\n![Helen Dudson Profile](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/Helen-Dudson-Picture-768x768.jpeg)\n\n### Helen Dudson\n**Symptoms** Eczema, bloating and discomfort\n\n[Read More](https:\/\/www.yorktest.com\/us\/case-study\/helen-dudson\/)\n\n![John Mudge Profile](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/John-Mudge-Profile-768x983.jpg)\n\n### John Mudge\n**Symptoms** Nausea and silent reflux\n\n[Read More](https:\/\/www.yorktest.com\/us\/case-study\/john-mudge\/)\n\n![Peter Vincent Profile](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/Peter-Vincent-scaled-1-768x1152.jpg)\n\n### Peter Vincent\n**Symptoms** Bloating, reflux and stomach issues\n\n[Read More](https:\/\/www.yorktest.com\/us\/case-study\/peter-vincent\/)\n\n![david and michelle case study](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/always-tired-depression-david.jpg)\n\n### David Brown\nI am a different person and the brain fog, anxiety and depression have now disappeared. I feel reborn and finally have my life back\n\n**Symptoms** Fatigue, anxiety\n\n[Read More](https:\/\/www.yorktest.com\/us\/case-study\/david-brown\/)\n\n![Kate Evans Profile](https:\/\/www.yorktest.com\/app\/uploads\/sites\/3\/2025\/08\/Kate-Evans-768x960.jpg)\n\n### Kate Evans\n**Symptoms** Stomach issues and bloating\n\n[Read More](https:\/\/www.yorktest.com\/us\/case-study\/kate-evans\/)","meta_canonical":null}

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Boilerpipe Text	Fish and shellfish consumption has seen a steady rise in the past decade as more Americans add it to their diets. Whether it’s a shrimp scampi or a summer clambake, shellfish can be a great way to get Omega-3 and 6 fatty acids into your diet. However, not everyone’s body reacts well to seafood. If you have an intolerance or sensitivity (defined by YorkTest as a food-specific IgG reaction), eating shellfish may actually pose a problem. Could your stomach cramps actually be a sign of shellfish sensitivity? What causes shellfish intolerance? A shellfish intolerance occurs when your digestive system does not have the appropriate enzymes to break down shellfish protein, producing an inflammatory response and difficulty digesting. This is different from a shellfish food allergy, which induces adverse reactions as a result of the body’s immune system. Allergy reactions tend to be more serious and could be life-threatening, especially if they cause an anaphylactic reaction affecting the respiratory system. Whilst you need to actually eat shellfish to experience intolerance symptoms, with a shellfish allergy, you can experience symptoms from just touching or cooking shellfish, depending on the severity of the food allergy. It’s also important to note that one-off digestive reactions to shellfish could also stem from food poisoning rather than a food intolerance (if the shellfish is appropriately prepared or not fresh). It is for this reason that it’s a good idea to keep a food diary to monitor offending foods. Signs of shellfish intolerance Shellfish sensitivity intolerance can appear up to 72 hours after eating shellfish and can range from mild symptoms to hypersensitive reactions. If you are suffering from a seafood or shellfish intolerance, it is important to discover which particular seafood is the offending food. Digestive symptoms of shellfish sensitivity may include: Abdominal pain Bloating Nausea Vomiting Diarrhea Save $60! Premium Food Sensitivity Test $199 $139 SALE: 30% OFF ENDS MONDAY FREE shipping The Premium Food Sensitivity Test measures your IgG reactivity to 200 foods and drinks . Get answers on which foods could be triggering your IBS symptoms, headaches, bloating, tiredness, and more. Simply collect your finger-prick blood sample at home. Mail it to our laboratory for testing. Then receive your results online within 7 days! 200 ingredients tested Tests are HSA and FSA accepted Analyzed in our accredited laboratory Clear, color-coded results show your IgG reactivity score for each ingredient Nutritional Therapist Consultation available to advise and support your dietary changes Customers must be aged 18 years or over to take this test. For under 18s, take our Junior Food Sensitivity Test . This test is not available to customers who are pregnant or breastfeeding. Testing for Shellfish Sensitivity To determine if your symptoms are related to a shellfish sensitivity, we recommend taking a food sensitivity test. This will help identify if a shellfish sensitivity is the cause of your discomfort and whether other ingredients are also affecting you at meal times. At YorkTest, we analyze your IgG antibodies 1-4 through a finger-prick blood sample: one of the most accurate methods of testing available. The blood test looks at over 200 ingredients that may trigger food sensitivities and their severity in an easy-to-understand traffic light system. Once you have your results, our team can help guide you to understand your food sensitivities, as well as advise you on your food and wellness journey. Where to Look for Shellfish Although there are easy ways to avoid eating shellfish, it’s still very important to read through food labels to fully avoid any accidental seafood consumption. Make sure to familiarize yourself with the various types of seafood and shellfish below if you have a shellfish sensitivity: White fish : Examples include cod, plaice, sole, coley, haddock, pollock, and monkfish. Oily fish : Mackerel, tuna, sardines, anchovies, salmon, pilchards, herring, and trout. Mollusks : Clams, mussels, oysters, snails, scallops, squid, and octopus. Crustaceans : Shrimp, crab, lobster, and crayfish. Food swaps when you have a shellfish sensitivity The USDA recommends eating around 8 ounces of seafood a week as part of a balanced diet. This is because seafood and shellfish contain a range of good nutrients, such as the omega-3 fatty acids, EPA and DHA, which can be found most notably in oysters (amongst other fish). To make sure you don’t miss out on these nutrients, try including the following food swaps for a healthy diet: Leafy greens such as spinach. Avocado. Walnuts, brazil nuts, hazelnuts, and pecans. Olive oil and flaxseed oil. Eggs. Sesame butter, and pumpkin seed butter. Tofu. Coconut oil. If you suspect you have an underlying food sensitivity to shellfish, a Premium Food Sensitivity Test may help you gain back control of your health and relationship with food. With your test results in hand and in line with professional medical advice, you can find a successful diet that helps put your digestive system at ease. YorkTest’s nutritional therapists can also help you take out the guesswork and optimise your daily food choices. Case Studies Helen Dudson Symptoms Eczema, bloating and discomfort Read More John Mudge Symptoms Nausea and silent reflux Read More Peter Vincent Symptoms Bloating, reflux and stomach issues Read More David Brown I am a different person and the brain fog, anxiety and depression have now disappeared. I feel reborn and finally have my life back Symptoms Fatigue, anxiety Read More Kate Evans Symptoms Stomach issues and bloating Read More
Markdown	[Skip to content](https://www.yorktest.com/us/intolerance/shellfish/#main) - [Corporate](https://www.yorktest.com/us/corporate-health-wellness/) - [Practitioners](https://www.yorktest.com/us/us-practitioners/) - [Contact Us](https://www.yorktest.com/us/contact-us/) - [Log In](https://wellnesshub.yorktest.com/us) - [0 Cart](https://www.yorktest.com/us/basket) [![](https://www.yorktest.com/app/uploads/sites/3/2025/08/yorktest-logo-1.svg)](https://www.yorktest.com/us) - [Tests](https://www.yorktest.com/us/products/) - [Our Tests](https://www.yorktest.com/us/products/) - [Premium Food Sensitivity Test](https://www.yorktest.com/us/products/premium-food-sensitivity/) - [Premium Nutrition Program](https://www.yorktest.com/us/products/premium-nutrition-program/) - [Food Allergy Test](https://www.yorktest.com/us/products/food-allergy-test/) - [Food Sensitivity & Allergy Test](https://www.yorktest.com/us/products/food-sensitivity-and-allergy-test/) - [Junior Food Sensitivity Test](https://www.yorktest.com/us/products/foodscan-junior-test/) - [Couples Food Sensitivity Test](https://www.yorktest.com/us/products/couples-food-sensitivity-test/) - [Parent & Child Food Sensitivity Test](https://www.yorktest.com/us/products/child-and-parent-food-sensitivity-test/) - [View All Tests](https://www.yorktest.com/us/products) - [Nutrition Services](https://www.yorktest.com/us/product-category/nutrition-services/) - [Nutritional Therapist Consultation (30 minute)](https://www.yorktest.com/us/products/nutritional-therapist-consultation/) - [View All Nutrition Services](https://www.yorktest.com/us/product-category/nutrition-services/) - [Our Tests](https://www.yorktest.com/us/products/) - [![View All Tests](https://www.yorktest.com/app/uploads/sites/3/2025/08/YorkTest-Lab-57-of-122-min.jpg) View All Tests](https://www.yorktest.com/us/products/) - [Our Testing](https://www.yorktest.com/us/how-it-works/) - [Our Testing](https://www.yorktest.com/us/how-it-works/) - [Taking The Test](https://www.yorktest.com/us/taking-the-test/) - [The Science](https://www.yorktest.com/us/how-it-works/the-science/) - [The Lab](https://www.yorktest.com/us/the-lab/) - [How It Works](https://www.yorktest.com/us/how-it-works/) - [![How It Works](https://www.yorktest.com/app/uploads/sites/3/2025/08/YorkTest-Lab-107-of-122-1-1-1024-2.jpg) How It Works](https://www.yorktest.com/us/how-it-works/) - [Find Out More](https://www.yorktest.com/us/how-it-works/) - [![Case Studies](https://www.yorktest.com/app/uploads/sites/3/2025/08/3-imagex2-1-min.jpg) Case Studies](https://www.yorktest.com/us/case-study/) - [View Case Studies](https://www.yorktest.com/us/case-study/) - [Advice](https://www.yorktest.com/us/advice-hub/) - [About Us](https://www.yorktest.com/us/about-us/) - [About Us](https://www.yorktest.com/us/about-us/) - [Case Studies](https://www.yorktest.com/us/case-study/) - [Contact Us](https://www.yorktest.com/us/contact-us/) - [![Why Choose YorkTest](https://www.yorktest.com/app/uploads/sites/3/2025/08/YorkTest-Lab-57-of-122-min.jpg) Why Choose YorkTest](https://www.yorktest.com/us/why-choose-yorktest/) - [Find Out More](https://www.yorktest.com/us/why-choose-yorktest/) - [![Contact Us](https://www.yorktest.com/app/uploads/sites/3/2025/08/york-test-office-10-of-19-1@2x.jpg) Contact Us](https://www.yorktest.com/us/contact-us/) - [Contact Us](https://www.yorktest.com/us/contact-us/) [![](https://www.yorktest.com/app/uploads/sites/3/2025/08/yorktest-logo-1.svg)](https://www.yorktest.com/us) [Cart icon 0](https://www.yorktest.com/us/basket/) - Main Menu Close mobile menu [SALE \\| 30% OFF \\| FREE SHIPPING](https://www.yorktest.com/us/products) [Shop Now](https://www.yorktest.com/us/products) [Home](https://www.yorktest.com/us) \> [Types Of Food Intolerance \\| Problem foods \\| yorktest](https://www.yorktest.com/us/intolerance/) \> Shellfish Intolerance and Sensitivity # Shellfish Sensitivity and Intolerance Fish and shellfish consumption has seen a steady rise in the past decade as more Americans add it to their diets. Whether it’s a shrimp scampi or a summer clambake, shellfish can be a great way to get Omega-3 and 6 fatty acids into your diet. However, not everyone’s body reacts well to seafood. If you have an intolerance or sensitivity (defined by YorkTest as a food-specific IgG reaction), eating shellfish may actually pose a problem. Could your stomach cramps actually be a sign of shellfish sensitivity? ![](https://www.yorktest.com/app/uploads/sites/3/2025/08/seafood-problem.jpg) ## What causes shellfish intolerance? A shellfish intolerance occurs when your digestive system does not have the appropriate enzymes to break down shellfish protein, producing an inflammatory response and difficulty digesting. This is different from a shellfish food allergy, which induces adverse reactions as a result of the body’s immune system. Allergy reactions tend to be more serious and could be life-threatening, especially if they cause an anaphylactic reaction affecting the respiratory system. Whilst you need to actually eat shellfish to experience intolerance symptoms, with a shellfish allergy, you can experience symptoms from just touching or cooking shellfish, depending on the severity of the food allergy. It’s also important to note that one-off digestive reactions to shellfish could also stem from food poisoning rather than a food intolerance (if the shellfish is appropriately prepared or not fresh). It is for this reason that it’s a good idea to keep a food diary to monitor offending foods. ## Signs of shellfish intolerance Shellfish sensitivity intolerance can appear up to 72 hours after eating shellfish and can range from mild symptoms to hypersensitive reactions. If you are suffering from a seafood or shellfish intolerance, it is important to discover which particular seafood is the offending food. Digestive symptoms of shellfish sensitivity may include: - Abdominal pain - Bloating - Nausea - Vomiting - Diarrhea Save \$60\! ![](https://www.yorktest.com/app/uploads/sites/3/2025/08/Premium-food-sensitivity-test-co.png) ## Premium Food Sensitivity Test \$199 \$139 SALE: 30% OFF ENDS MONDAY ##### FREE shipping The Premium Food Sensitivity Test measures your IgG reactivity to 200 foods and drinks. Get answers on which foods could be triggering your IBS symptoms, headaches, bloating, tiredness, and more. Simply collect your finger-prick blood sample at home. Mail it to our laboratory for testing. Then receive your results online within 7 days\! - 200 ingredients tested - Tests are HSA and FSA accepted - Analyzed in our accredited laboratory - Clear, color-coded results show your IgG reactivity score for each ingredient - Nutritional Therapist Consultation available to advise and support your dietary changes Customers must be aged 18 years or over to take this test. For under 18s, take our [Junior Food Sensitivity Test](https://www.yorktest.com/us/products/foodscan-junior-test/). This test is not available to customers who are pregnant or breastfeeding. [Read More](https://www.yorktest.com/us/products/premium-food-sensitivity/) [Buy Now](https://www.yorktest.com/us/intolerance/shellfish/?add-to-cart=62) ## Testing for Shellfish Sensitivity To determine if your symptoms are related to a shellfish sensitivity, we recommend taking a [food sensitivity test.](https://www.yorktest.com/us/products/premium-food-sensitivity/) This will help identify if a shellfish sensitivity is the cause of your discomfort and whether other ingredients are also affecting you at meal times. At YorkTest, we analyze your [IgG antibodies](https://www.yorktest.com/us/what-is-igg/) 1-4 through a finger-prick blood sample: one of the most accurate methods of testing available. The blood test looks at over 200 ingredients that may trigger food sensitivities and their severity in an easy-to-understand traffic light system. Once you have your results, our team can help guide you to understand your food sensitivities, as well as advise you on your food and wellness journey. ## Where to Look for Shellfish Although there are easy ways to avoid eating shellfish, it’s still very important to read through food labels to fully avoid any accidental seafood consumption. Make sure to familiarize yourself with the various types of seafood and shellfish below if you have a shellfish sensitivity: - White fish: Examples include cod, plaice, sole, coley, haddock, pollock, and monkfish. - Oily fish: Mackerel, tuna, sardines, anchovies, salmon, pilchards, herring, and trout. - Mollusks: Clams, mussels, oysters, snails, scallops, squid, and octopus. - Crustaceans: Shrimp, crab, lobster, and crayfish. ![](https://www.yorktest.com/app/uploads/sites/3/2025/08/shutterstock_1028320018-1-1024x6-1.jpg) ## Food swaps when you have a shellfish sensitivity The USDA recommends eating around 8 ounces of seafood a week as part of a balanced diet. This is because seafood and shellfish contain a range of good nutrients, such as the omega-3 fatty acids, EPA and DHA, which can be found most notably in oysters (amongst other fish). To make sure you don’t miss out on these nutrients, try including the following food swaps for a healthy diet: - Leafy greens such as spinach. - Avocado. - Walnuts, brazil nuts, hazelnuts, and pecans. - Olive oil and flaxseed oil. - Eggs. - Sesame butter, and pumpkin seed butter. - Tofu. - Coconut oil. ![](https://www.yorktest.com/app/uploads/sites/3/2025/08/Fresh-strawberry-and-avocado-sal-3.jpg) If you suspect you have an underlying food sensitivity to shellfish, a [Premium Food Sensitivity Test](https://www.yorktest.com/us/products/premium-food-sensitivity/) may help you gain back control of your health and relationship with food. With your test results in hand and in line with professional medical advice, you can find a successful diet that helps put your digestive system at ease. YorkTest’s [nutritional therapists](https://www.yorktest.com/our-experts/) can also help you take out the guesswork and optimise your daily food choices. ![](https://www.yorktest.com/app/uploads/sites/3/2025/08/cathryn-lavery-67852-unsplash-1-2.jpg) [![oat-problem](https://www.yorktest.com/app/uploads/sites/3/2025/08/oat-problem.jpg) Oat Find Out More](https://www.yorktest.com/intolerance/oat) [![shutterstock\_482016079-1-1024x68 (2)](https://www.yorktest.com/app/uploads/sites/3/2025/08/shutterstock_482016079-1-1024x68-2-1.jpg) Yeast Find Out More](https://www.yorktest.com/intolerance/yeast) [![gluten-intolerance-in-bread-e152](https://www.yorktest.com/app/uploads/sites/3/2025/08/gluten-intolerance-in-bread-e152.jpg) Gluten Find Out More](https://www.yorktest.com/intolerance/gluten) [![Yeast-in-Alcohol-1024x576 (1)](https://www.yorktest.com/app/uploads/sites/3/2025/08/Yeast-in-Alcohol-1024x576-1-1.jpg) Alcohol Find Out More](https://www.yorktest.com/intolerance/alcohol) [![dairy-problem](https://www.yorktest.com/app/uploads/sites/3/2025/08/dairy-problem.png) Dairy Find Out More](https://www.yorktest.com/intolerance/dairy) [![Depositphotos\_65817401\_l-2015-10 (1)](https://www.yorktest.com/app/uploads/sites/3/2025/08/Depositphotos_65817401_l-2015-10-1.jpg) Wheat Find Out More](https://www.yorktest.com/intolerance/wheat) ## Case Studies ![Helen Dudson Profile](https://www.yorktest.com/app/uploads/sites/3/2025/08/Helen-Dudson-Picture-768x768.jpeg) ### Helen Dudson Symptoms Eczema, bloating and discomfort [Read More](https://www.yorktest.com/us/case-study/helen-dudson/) ![John Mudge Profile](https://www.yorktest.com/app/uploads/sites/3/2025/08/John-Mudge-Profile-768x983.jpg) ### John Mudge Symptoms Nausea and silent reflux [Read More](https://www.yorktest.com/us/case-study/john-mudge/) ![Peter Vincent Profile](https://www.yorktest.com/app/uploads/sites/3/2025/08/Peter-Vincent-scaled-1-768x1152.jpg) ### Peter Vincent Symptoms Bloating, reflux and stomach issues [Read More](https://www.yorktest.com/us/case-study/peter-vincent/) ![david and michelle case study](https://www.yorktest.com/app/uploads/sites/3/2025/08/always-tired-depression-david.jpg) ### David Brown I am a different person and the brain fog, anxiety and depression have now disappeared. I feel reborn and finally have my life back Symptoms Fatigue, anxiety [Read More](https://www.yorktest.com/us/case-study/david-brown/) ![Kate Evans Profile](https://www.yorktest.com/app/uploads/sites/3/2025/08/Kate-Evans-768x960.jpg) ### Kate Evans Symptoms Stomach issues and bloating [Read More](https://www.yorktest.com/us/case-study/kate-evans/) ## You might be interested in Save \$60 \! [![Premium Food Sensitivity Test](https://www.yorktest.com/app/uploads/sites/3/2025/08/Premium-food-sensitivity-test-co-600x600-c-default.png)](https://www.yorktest.com/us/products/premium-food-sensitivity/) ### [Premium Food Sensitivity Test](https://www.yorktest.com/us/products/premium-food-sensitivity/) Analyzes your reactivity to 200 food and drink ingredients. Ideal if suffering from IBS, headaches, bloating, skin issues and tiredness. \$199 \$139 [View Test](https://www.yorktest.com/us/products/premium-food-sensitivity/) Save \$102 \! [![Food Sensitivity & Allergy Test](https://www.yorktest.com/app/uploads/sites/3/2025/08/Prem-sensitivity-food-allergy-US-600x600-c-default.png)](https://www.yorktest.com/us/products/food-sensitivity-and-allergy-test/) ### [Food Sensitivity & Allergy Test](https://www.yorktest.com/us/products/food-sensitivity-and-allergy-test/) Unsure if you have a food sensitivity or a food allergy? Many people believe that they are the same thing,… \$339 \$237 [View Test](https://www.yorktest.com/us/products/food-sensitivity-and-allergy-test/) Save \$69 \! [![Premium Nutrition Program](https://www.yorktest.com/app/uploads/sites/3/2025/08/Premium-Nutrition-Plan-600x600-c-default.jpg)](https://www.yorktest.com/us/products/premium-nutrition-program/) ### [Premium Nutrition Program](https://www.yorktest.com/us/products/premium-nutrition-program/) Start your Premium Nutrition Program today with one of our qualified diet & nutrition experts. Includes a Premium Food Sensitivity… \$229 \$160 [View Test](https://www.yorktest.com/us/products/premium-nutrition-program/) Save \$102 \! [![Couples Food Sensitivity Test](https://www.yorktest.com/app/uploads/sites/3/2025/08/Couples-food-sensitivity-test-co-600x600-c-default.png)](https://www.yorktest.com/us/products/couples-food-sensitivity-test/) ### [Couples Food Sensitivity Test](https://www.yorktest.com/us/products/couples-food-sensitivity-test/) Optimize your health together, try a test with your partner, family or a friend. \$339 \$237 [View Test](https://www.yorktest.com/us/products/couples-food-sensitivity-test/) Save \$60 \! [![Junior Food Sensitivity Test](https://www.yorktest.com/app/uploads/sites/3/2025/08/Junior-food-sensitivity-test-600x600-c-default.png)](https://www.yorktest.com/us/products/foodscan-junior-test/) ### [Junior Food Sensitivity Test](https://www.yorktest.com/us/products/foodscan-junior-test/) Tests for more than 100 ingredients. Ideal for children over 2 years old. Includes a food diary and guidebook. \$199 \$139 [View Test](https://www.yorktest.com/us/products/foodscan-junior-test/) ## Related Articles [![Stress and Menstrual Cycles: Can Stress Delay Your Period?](https://www.yorktest.com/app/uploads/sites/3/2025/08/Depositphotos_147829583_xl-2015-1-1-1024x474-2-768x356.jpg) Stress and Menstrual Cycles: Can Stress Delay Your Period?](https://www.yorktest.com/us/blog/stress-and-menstrual-cycles-can-stress-delay-your-period/) [![Average Testosterone Levels by Age and Their Impact on Health](https://www.yorktest.com/app/uploads/sites/3/2025/08/Testosterone-by-age-768x512.jpeg) Average Testosterone Levels by Age and Their Impact on Health](https://www.yorktest.com/us/blog/average-testosterone-levels-by-age-and-their-impact-on-health/) [![What Is A Food Sensitivity Test and How Can It Improve Your Well-Being?](https://www.yorktest.com/app/uploads/sites/3/2025/08/Premium-Food-Sensitivity-Test-Corporate-Wellness-Banner-1024-%C3%97-788-px-1-768x591.png) What Is A Food Sensitivity Test and How Can It Improve Your Well-Being?](https://www.yorktest.com/us/blog/what-is-a-food-sensitivity-test-and-how-can-it-improve-your-well-being/) [![Navigating Celiac Disease - Screening, Diagnosis, and Dietary Decisions](https://www.yorktest.com/app/uploads/sites/3/2025/08/Gluten-Intolerance-vs-Wheat-Sensitivity-vs-Celiac-Disease-768x576.png) Navigating Celiac Disease – Screening, Diagnosis, and Dietary Decisions](https://www.yorktest.com/us/blog/navigating-celiac-disease-screening-diagnosis-and-dietary-decisions/) YorkTest is an award-winning food sensitivity & allergy testing company, supporting you to optimize your health and wellbeing with our home-to-laboratory tests. *\ Disclaimer** YorkTest food sensitivity test results are provided for informational purposes only and are not a substitute for professional medical advice. The results cannot be used to diagnose, treat or cure medical or health conditions. If you are concerned about your symptoms then please contact your medical provider. Information on this website is for educational purposes only and you must never disregard professional medical advice or delay in seeking it based on the information provided here. YorkTest define Food Intolerance as a food-specific IgG reaction. The YorkTest food sensitivity test is not an allergy, celiac or lactose intolerance test. YorkTest tests are not offered in New York state. YorkTest Laboratories’ ELISA analyses are designed to assay specific IgG (subclasses 1, 2, 3, 4) antibodies. The scoring of 0 to 100 provides an indication of the level of IgG antibodies detected through spectrophotometric analysis. The antigens on the panel are subject to change without prior notice. This test was developed and its performance characteristics determined by YorkTest Laboratories. Test methodology has not been cleared or approved by the U.S. Food and Drug Administration. 82% of customers reported that their YorkTest Laboratories test had a positive impact on their health and wellbeing. 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Readable Markdown	Fish and shellfish consumption has seen a steady rise in the past decade as more Americans add it to their diets. Whether it’s a shrimp scampi or a summer clambake, shellfish can be a great way to get Omega-3 and 6 fatty acids into your diet. However, not everyone’s body reacts well to seafood. If you have an intolerance or sensitivity (defined by YorkTest as a food-specific IgG reaction), eating shellfish may actually pose a problem. Could your stomach cramps actually be a sign of shellfish sensitivity? ![](https://www.yorktest.com/app/uploads/sites/3/2025/08/seafood-problem.jpg) ## What causes shellfish intolerance? A shellfish intolerance occurs when your digestive system does not have the appropriate enzymes to break down shellfish protein, producing an inflammatory response and difficulty digesting. This is different from a shellfish food allergy, which induces adverse reactions as a result of the body’s immune system. Allergy reactions tend to be more serious and could be life-threatening, especially if they cause an anaphylactic reaction affecting the respiratory system. Whilst you need to actually eat shellfish to experience intolerance symptoms, with a shellfish allergy, you can experience symptoms from just touching or cooking shellfish, depending on the severity of the food allergy. It’s also important to note that one-off digestive reactions to shellfish could also stem from food poisoning rather than a food intolerance (if the shellfish is appropriately prepared or not fresh). It is for this reason that it’s a good idea to keep a food diary to monitor offending foods. ## Signs of shellfish intolerance Shellfish sensitivity intolerance can appear up to 72 hours after eating shellfish and can range from mild symptoms to hypersensitive reactions. If you are suffering from a seafood or shellfish intolerance, it is important to discover which particular seafood is the offending food. Digestive symptoms of shellfish sensitivity may include: - Abdominal pain - Bloating - Nausea - Vomiting - Diarrhea Save \$60\! ![](https://www.yorktest.com/app/uploads/sites/3/2025/08/Premium-food-sensitivity-test-co.png) ## Premium Food Sensitivity Test \$199 \$139 SALE: 30% OFF ENDS MONDAY ##### FREE shipping The Premium Food Sensitivity Test measures your IgG reactivity to 200 foods and drinks. Get answers on which foods could be triggering your IBS symptoms, headaches, bloating, tiredness, and more. Simply collect your finger-prick blood sample at home. Mail it to our laboratory for testing. Then receive your results online within 7 days\! - 200 ingredients tested - Tests are HSA and FSA accepted - Analyzed in our accredited laboratory - Clear, color-coded results show your IgG reactivity score for each ingredient - Nutritional Therapist Consultation available to advise and support your dietary changes Customers must be aged 18 years or over to take this test. For under 18s, take our [Junior Food Sensitivity Test](https://www.yorktest.com/us/products/foodscan-junior-test/). This test is not available to customers who are pregnant or breastfeeding. ## Testing for Shellfish Sensitivity To determine if your symptoms are related to a shellfish sensitivity, we recommend taking a [food sensitivity test.](https://www.yorktest.com/us/products/premium-food-sensitivity/) This will help identify if a shellfish sensitivity is the cause of your discomfort and whether other ingredients are also affecting you at meal times. At YorkTest, we analyze your [IgG antibodies](https://www.yorktest.com/us/what-is-igg/) 1-4 through a finger-prick blood sample: one of the most accurate methods of testing available. The blood test looks at over 200 ingredients that may trigger food sensitivities and their severity in an easy-to-understand traffic light system. Once you have your results, our team can help guide you to understand your food sensitivities, as well as advise you on your food and wellness journey. ## Where to Look for Shellfish Although there are easy ways to avoid eating shellfish, it’s still very important to read through food labels to fully avoid any accidental seafood consumption. Make sure to familiarize yourself with the various types of seafood and shellfish below if you have a shellfish sensitivity: - White fish: Examples include cod, plaice, sole, coley, haddock, pollock, and monkfish. - Oily fish: Mackerel, tuna, sardines, anchovies, salmon, pilchards, herring, and trout. - Mollusks: Clams, mussels, oysters, snails, scallops, squid, and octopus. - Crustaceans: Shrimp, crab, lobster, and crayfish. ![](https://www.yorktest.com/app/uploads/sites/3/2025/08/shutterstock_1028320018-1-1024x6-1.jpg) ## Food swaps when you have a shellfish sensitivity The USDA recommends eating around 8 ounces of seafood a week as part of a balanced diet. This is because seafood and shellfish contain a range of good nutrients, such as the omega-3 fatty acids, EPA and DHA, which can be found most notably in oysters (amongst other fish). To make sure you don’t miss out on these nutrients, try including the following food swaps for a healthy diet: - Leafy greens such as spinach. - Avocado. - Walnuts, brazil nuts, hazelnuts, and pecans. - Olive oil and flaxseed oil. - Eggs. - Sesame butter, and pumpkin seed butter. - Tofu. - Coconut oil. ![](https://www.yorktest.com/app/uploads/sites/3/2025/08/Fresh-strawberry-and-avocado-sal-3.jpg) If you suspect you have an underlying food sensitivity to shellfish, a [Premium Food Sensitivity Test](https://www.yorktest.com/us/products/premium-food-sensitivity/) may help you gain back control of your health and relationship with food. With your test results in hand and in line with professional medical advice, you can find a successful diet that helps put your digestive system at ease. YorkTest’s [nutritional therapists](https://www.yorktest.com/our-experts/) can also help you take out the guesswork and optimise your daily food choices. ![](https://www.yorktest.com/app/uploads/sites/3/2025/08/cathryn-lavery-67852-unsplash-1-2.jpg) Case Studies ![Helen Dudson Profile](https://www.yorktest.com/app/uploads/sites/3/2025/08/Helen-Dudson-Picture-768x768.jpeg) ### Helen Dudson Symptoms Eczema, bloating and discomfort [Read More](https://www.yorktest.com/us/case-study/helen-dudson/) ![John Mudge Profile](https://www.yorktest.com/app/uploads/sites/3/2025/08/John-Mudge-Profile-768x983.jpg) ### John Mudge Symptoms Nausea and silent reflux [Read More](https://www.yorktest.com/us/case-study/john-mudge/) ![Peter Vincent Profile](https://www.yorktest.com/app/uploads/sites/3/2025/08/Peter-Vincent-scaled-1-768x1152.jpg) ### Peter Vincent Symptoms Bloating, reflux and stomach issues [Read More](https://www.yorktest.com/us/case-study/peter-vincent/) ![david and michelle case study](https://www.yorktest.com/app/uploads/sites/3/2025/08/always-tired-depression-david.jpg) ### David Brown I am a different person and the brain fog, anxiety and depression have now disappeared. I feel reborn and finally have my life back Symptoms Fatigue, anxiety [Read More](https://www.yorktest.com/us/case-study/david-brown/) ![Kate Evans Profile](https://www.yorktest.com/app/uploads/sites/3/2025/08/Kate-Evans-768x960.jpg) ### Kate Evans Symptoms Stomach issues and bloating [Read More](https://www.yorktest.com/us/case-study/kate-evans/)
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