🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 160 (from laksa033)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa160.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.sciencedaily.com/releases/2019/05/190510095102.htm\')), getAhrefsUnparsedNoserviceFromURL(\'https://www.sciencedaily.com/releases/2019/05/190510095102.htm\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/www.sciencedaily.com\/releases\/2019\/05\/190510095102.htm","crawl_time":1775153494,"first_indexed_time":1557688289,"http_code":200,"src_unparsed":"com,sciencedaily!www,\/releases\/2019\/05\/190510095102.htm s443","src_root_hash":"9815798517118690960","history_drop_reason":null,"meta_title":"Coffee: How many cups are too much to drink a day? | ScienceDaily","meta_descriptions":["A morning coffee is an essential for many people looking to kick start their day. But while the humble coffee may be a vital feature of the daily grind, how much is too much?"],"attrs_boilerpipe_text":"Latte, cappuccino or short black, a morning coffee is an essential for many people looking to kick start their day. But while the humble coffee may be a vital feature of the daily grind, how much is too much?\nWhile the pros and cons of drinking coffee have been debated for decades, new research from the University of South Australia reveals that drinking six or more coffees a day can be detrimental to your health, increasing your risk of heart disease by up to 22 per cent.\nIn Australia, one in six people are affected by cardiovascular disease. It is a major cause of death with one person dying from the disease every 12 minutes. According to the World Health Organization, cardiovascular disease is the leading cause of death, yet one of the most preventable.\nInvestigating the association of long-term coffee consumption and cardiovascular disease, UniSA researchers Dr Ang Zhou and Professor Elina Hyppönen of the Australian Centre for Precision Health say their research confirms the point at which excess caffeine can cause high blood pressure, a precursor to heart disease.\nThis is the first time an upper limit has been placed on safe coffee consumption and cardiovascular health.\n\"Coffee is the most commonly consumed stimulant in the world -- it wakes us up, boosts our energy and helps us focus -- but people are always asking 'How much caffeine is too much?',\" Prof Hyppönen says.\n\"Most people would agree that if you drink a lot of coffee, you might feel jittery, irritable or perhaps even nauseas -- that's because caffeine helps your body work faster and harder, but it is also likely to suggest that you may have reached your limit for the time being.\n\"We also know that risk of cardiovascular disease increases with high blood pressure, a known consequence of excess caffeine consumption.\n\"In order to maintain a healthy heart and a healthy blood pressure, people must limit their coffees to fewer than six cups a day -- based on our data six was the tipping point where caffeine started to negatively affect cardiovascular risk.\"\nUsing UK Biobank data of 347,077 participants aged 37-73 years, the study explored the ability of the caffeine-metabolizing gene (CYP1A2) to better process caffeine, identifying increased risks of cardiovascular disease in line with coffee consumption and genetic variations.\nProf Hyppönen says that despite carriers of the fast-processing gene variation being four times quicker at metabolising caffeine, the research does not support the belief that these people could safely consume more caffeine, more frequently, without detrimental health effects.\n\"An estimated three billion cups of coffee are enjoyed every day around the world,\" Prof Hyppönen says.\n\"Knowing the limits of what's good for you and what's not is imperative.\n\"As with many things, it's all about moderation; overindulge and your health will pay for it.\"","attrs_markdown":"[Skip to main content](https:\/\/www.sciencedaily.com\/releases\/2019\/05\/190510095102.htm#main)\n\n[![ScienceDaily](https:\/\/www.sciencedaily.com\/images\/sd-logo.png)](https:\/\/www.sciencedaily.com\/ \"ScienceDaily\")\n***\nYour source for the latest research news\n\n[Follow:](https:\/\/www.sciencedaily.com\/releases\/2019\/05\/190510095102.htm) [*Facebook*](https:\/\/www.facebook.com\/sciencedaily) [*X\/Twitter*](https:\/\/twitter.com\/sciencedaily) [Subscribe:](https:\/\/www.sciencedaily.com\/releases\/2019\/05\/190510095102.htm) [*RSS Feeds*](https:\/\/www.sciencedaily.com\/newsfeeds.htm) [*Newsletter*](https:\/\/sciencedaily.substack.com\/)\n\n**New\\!** Sign up for our free **[email newsletter](https:\/\/sciencedaily.substack.com\/)**.\n\nScience News\n\nfrom research organizations\n***\n# Coffee: How many cups are too much to drink a day?\nDate:\n\nMay 12, 2019\n\nSource:\n\nUniversity of South Australia\n\nSummary:\n\nA morning coffee is an essential for many people looking to kick start their day. But while the humble coffee may be a vital feature of the daily grind, how much is too much?\n\nShare:\n\n[Facebook](https:\/\/www.sciencedaily.com\/releases\/2019\/05\/190510095102.htm) [Twitter](https:\/\/www.sciencedaily.com\/releases\/2019\/05\/190510095102.htm) [Pinterest](https:\/\/www.sciencedaily.com\/releases\/2019\/05\/190510095102.htm) [LinkedIN](https:\/\/www.sciencedaily.com\/releases\/2019\/05\/190510095102.htm) [Email](https:\/\/www.sciencedaily.com\/releases\/2019\/05\/190510095102.htm)\n\nFULL STORY\n***\nLatte, cappuccino or short black, a morning coffee is an essential for many people looking to kick start their day. But while the humble coffee may be a vital feature of the daily grind, how much is too much?\n\nWhile the pros and cons of drinking coffee have been debated for decades, new research from the University of South Australia reveals that drinking six or more coffees a day can be detrimental to your health, increasing your risk of heart disease by up to 22 per cent.\n\nIn Australia, one in six people are affected by cardiovascular disease. It is a major cause of death with one person dying from the disease every 12 minutes. According to the World Health Organization, cardiovascular disease is the leading cause of death, yet one of the most preventable.\n\nInvestigating the association of long-term coffee consumption and cardiovascular disease, UniSA researchers Dr Ang Zhou and Professor Elina Hyppönen of the Australian Centre for Precision Health say their research confirms the point at which excess caffeine can cause high blood pressure, a precursor to heart disease.\n\nThis is the first time an upper limit has been placed on safe coffee consumption and cardiovascular health.\n\n\"Coffee is the most commonly consumed stimulant in the world -- it wakes us up, boosts our energy and helps us focus -- but people are always asking 'How much caffeine is too much?',\" Prof Hyppönen says.\n\n\"Most people would agree that if you drink a lot of coffee, you might feel jittery, irritable or perhaps even nauseas -- that's because caffeine helps your body work faster and harder, but it is also likely to suggest that you may have reached your limit for the time being.\n\n\"We also know that risk of cardiovascular disease increases with high blood pressure, a known consequence of excess caffeine consumption.\n\n\"In order to maintain a healthy heart and a healthy blood pressure, people must limit their coffees to fewer than six cups a day -- based on our data six was the tipping point where caffeine started to negatively affect cardiovascular risk.\"\n\nUsing UK Biobank data of 347,077 participants aged 37-73 years, the study explored the ability of the caffeine-metabolizing gene (CYP1A2) to better process caffeine, identifying increased risks of cardiovascular disease in line with coffee consumption and genetic variations.\n\nProf Hyppönen says that despite carriers of the fast-processing gene variation being four times quicker at metabolising caffeine, the research does not support the belief that these people could safely consume more caffeine, more frequently, without detrimental health effects.\n\n\"An estimated three billion cups of coffee are enjoyed every day around the world,\" Prof Hyppönen says.\n\n\"Knowing the limits of what's good for you and what's not is imperative.\n\n\"As with many things, it's all about moderation; overindulge and your health will pay for it.\"\n\n- [RELATED TOPICS](https:\/\/www.sciencedaily.com\/releases\/2019\/05\/190510095102.htm)\n  - [Health & Medicine](https:\/\/www.sciencedaily.com\/news\/health_medicine\/)\n    - [Heart Disease](https:\/\/www.sciencedaily.com\/news\/health_medicine\/heart_disease\/)\n    - [Workplace Health](https:\/\/www.sciencedaily.com\/news\/health_medicine\/workplace_health\/)\n    - [Gastrointestinal Problems](https:\/\/www.sciencedaily.com\/news\/health_medicine\/gastrointestinal_problems\/)\n    - [Pharmacology](https:\/\/www.sciencedaily.com\/news\/health_medicine\/pharmacology\/)\n    - [Healthy Aging](https:\/\/www.sciencedaily.com\/news\/health_medicine\/healthy_aging\/)\n    - [Diseases and Conditions](https:\/\/www.sciencedaily.com\/news\/health_medicine\/diseases_and_conditions\/)\n    - [Chronic Illness](https:\/\/www.sciencedaily.com\/news\/health_medicine\/chronic_illness\/)\n    - [Disability](https:\/\/www.sciencedaily.com\/news\/health_medicine\/disability\/)\n\n- [RELATED TERMS](https:\/\/www.sciencedaily.com\/releases\/2019\/05\/190510095102.htm)\n  - [Delayed sleep phase syndrome](https:\/\/www.sciencedaily.com\/terms\/delayed_sleep_phase_syndrome.htm)\n  - [Coffee](https:\/\/www.sciencedaily.com\/terms\/coffee.htm)\n  - [Essential nutrient](https:\/\/www.sciencedaily.com\/terms\/essential_nutrient.htm)\n  - [Microorganism](https:\/\/www.sciencedaily.com\/terms\/microorganism.htm)\n  - [Fever](https:\/\/www.sciencedaily.com\/terms\/fever.htm)\n  - [Caffeine](https:\/\/www.sciencedaily.com\/terms\/caffeine.htm)\n  - [Nutrition](https:\/\/www.sciencedaily.com\/terms\/nutrition.htm)\n  - [Zone diet](https:\/\/www.sciencedaily.com\/terms\/zone_diet.htm)\n***\n**Story Source:**\n\n[Materials](https:\/\/www.unisa.edu.au\/Media-Centre\/Releases\/2019\/a-cup-of-joe-and-youre-good-to-go-under-6-a-day-and-youre-a-ok\/#.XNT2Y7hS_V8) provided by [**University of South Australia**](https:\/\/www.unisa.edu.au\/). *Note: Content may be edited for style and length.*\n***\n**Journal Reference**:\n\n1. Ang Zhou, Elina Hyppönen. **Long-term coffee consumption, caffeine metabolism genetics, and risk of cardiovascular disease: a prospective analysis of up to 347,077 individuals and 8368 cases**. *The American Journal of Clinical Nutrition*, 2019; 109 (3): 509 DOI: [10\\.1093\/ajcn\/nqy297](http:\/\/dx.doi.org\/10.1093\/ajcn\/nqy297)\n***\n\n**Cite This Page**:\n\n- [MLA](https:\/\/www.sciencedaily.com\/releases\/2019\/05\/190510095102.htm#citation_mla)\n- [APA](https:\/\/www.sciencedaily.com\/releases\/2019\/05\/190510095102.htm#citation_apa)\n- [Chicago](https:\/\/www.sciencedaily.com\/releases\/2019\/05\/190510095102.htm#citation_chicago)\n\nUniversity of South Australia. \"Coffee: How many cups are too much to drink a day?.\" ScienceDaily. ScienceDaily, 12 May 2019. \\<www.sciencedaily.com\n\n\/\n\nreleases\n\n\/\n\n2019\n\n\/\n\n05\n\n\/\n\n190510095102.htm\\>.\n\nUniversity of South Australia. (2019, May 12). Coffee: How many cups are too much to drink a day?. *ScienceDaily*. Retrieved April 1, 2026 from www.sciencedaily.com\n\n\/\n\nreleases\n\n\/\n\n2019\n\n\/\n\n05\n\n\/\n\n190510095102.htm\n\nUniversity of South Australia. \"Coffee: How many cups are too much to drink a day?.\" ScienceDaily. www.sciencedaily.com\n\n\/\n\nreleases\n\n\/\n\n2019\n\n\/\n\n05\n\n\/\n\n190510095102.htm (accessed April 1, 2026).\n\n## Explore More\nfrom ScienceDaily\n***\nRELATED STORIES\n***\n[Your Daily Coffee May Be Protecting Your Brain, 43-Year Study Finds](https:\/\/www.sciencedaily.com\/releases\/2026\/03\/260318033138.htm)\n\nMar. 18, 2026  Your morning coffee or tea could be quietly supporting your brain health. A long-term study found that moderate consumption of caffeinated coffee or tea was linked to an 18% lower risk of dementia ...\n\n[Black Coffee, Longer Life: The Science Behind Your Morning Perk](https:\/\/www.sciencedaily.com\/releases\/2025\/06\/250617014142.htm)\n\nJune 17, 2025  Coffee might be doing more than fueling your morning routine it could be extending your life. A large-scale study by Tufts University suggests that drinking one to three cups of caffeinated coffee ...\n\n[Stronger Coffee With Fewer Coffee Beans](https:\/\/www.sciencedaily.com\/releases\/2025\/04\/250408121329.htm)\n\nApr. 8, 2025  Researchers have worked to optimize the use of coffee grounds in pour-over coffee. They recommend pouring from as high as possible while still maintaining the water's flow. 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Questions?\n\n- [Leave Feedback](https:\/\/www.sciencedaily.com\/releases\/2019\/05\/190510095102.htm)\n- [Contact Us](https:\/\/www.sciencedaily.com\/contact.htm)\n\n[About This Site](https:\/\/www.sciencedaily.com\/about.htm) \\| [Staff](https:\/\/www.sciencedaily.com\/staff.htm) \\| [Contribute](https:\/\/www.sciencedaily.com\/contribute.htm) \\| [Advertise](https:\/\/www.sciencedaily.com\/advertise.htm) \\| [Privacy Policy](https:\/\/www.sciencedaily.com\/privacy.htm) \\| [Editorial Policy](https:\/\/www.sciencedaily.com\/editorial.htm) \\| [Terms of Use](https:\/\/www.sciencedaily.com\/terms.htm)\n\n[Copyright 1995-2026 ScienceDaily](https:\/\/www.sciencedaily.com\/copyright.htm) or by other parties, where indicated. All rights controlled by their respective owners. Content on this website is for information only. It is not intended to provide medical or other professional advice. Views expressed here do not necessarily reflect those of ScienceDaily, contributors or partners. Financial support for ScienceDaily comes from advertisements and referral programs.\n\nShare this page ...\n\n**Coffee: How many cups are too much to drink a day?**  \n <https:\/\/www.sciencedaily.com\/releases\/2019\/05\/190510095102.htm>\n\nA morning coffee is an essential for many people looking to kick start their day. But while the humble coffee may be a vital feature of the daily grind, how much is too much?\n\n[Facebook](https:\/\/www.sciencedaily.com\/releases\/2019\/05\/190510095102.htm) [Twitter](https:\/\/www.sciencedaily.com\/releases\/2019\/05\/190510095102.htm) [Pinterest](https:\/\/www.sciencedaily.com\/releases\/2019\/05\/190510095102.htm) [LinkedIN](https:\/\/www.sciencedaily.com\/releases\/2019\/05\/190510095102.htm) [Email](https:\/\/www.sciencedaily.com\/releases\/2019\/05\/190510095102.htm)\n\nClose","attrs_readable_markdown":"Latte, cappuccino or short black, a morning coffee is an essential for many people looking to kick start their day. But while the humble coffee may be a vital feature of the daily grind, how much is too much?\n\nWhile the pros and cons of drinking coffee have been debated for decades, new research from the University of South Australia reveals that drinking six or more coffees a day can be detrimental to your health, increasing your risk of heart disease by up to 22 per cent.\n\nIn Australia, one in six people are affected by cardiovascular disease. It is a major cause of death with one person dying from the disease every 12 minutes. According to the World Health Organization, cardiovascular disease is the leading cause of death, yet one of the most preventable.\n\nInvestigating the association of long-term coffee consumption and cardiovascular disease, UniSA researchers Dr Ang Zhou and Professor Elina Hyppönen of the Australian Centre for Precision Health say their research confirms the point at which excess caffeine can cause high blood pressure, a precursor to heart disease.\n\nThis is the first time an upper limit has been placed on safe coffee consumption and cardiovascular health.\n\n\"Coffee is the most commonly consumed stimulant in the world -- it wakes us up, boosts our energy and helps us focus -- but people are always asking 'How much caffeine is too much?',\" Prof Hyppönen says.\n\n\"Most people would agree that if you drink a lot of coffee, you might feel jittery, irritable or perhaps even nauseas -- that's because caffeine helps your body work faster and harder, but it is also likely to suggest that you may have reached your limit for the time being.\n\n\"We also know that risk of cardiovascular disease increases with high blood pressure, a known consequence of excess caffeine consumption.\n\n\"In order to maintain a healthy heart and a healthy blood pressure, people must limit their coffees to fewer than six cups a day -- based on our data six was the tipping point where caffeine started to negatively affect cardiovascular risk.\"\n\nUsing UK Biobank data of 347,077 participants aged 37-73 years, the study explored the ability of the caffeine-metabolizing gene (CYP1A2) to better process caffeine, identifying increased risks of cardiovascular disease in line with coffee consumption and genetic variations.\n\nProf Hyppönen says that despite carriers of the fast-processing gene variation being four times quicker at metabolising caffeine, the research does not support the belief that these people could safely consume more caffeine, more frequently, without detrimental health effects.\n\n\"An estimated three billion cups of coffee are enjoyed every day around the world,\" Prof Hyppönen says.\n\n\"Knowing the limits of what's good for you and what's not is imperative.\n\n\"As with many things, it's all about moderation; overindulge and your health will pay for it.\"","meta_canonical":null}

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Boilerpipe Text	Latte, cappuccino or short black, a morning coffee is an essential for many people looking to kick start their day. But while the humble coffee may be a vital feature of the daily grind, how much is too much? While the pros and cons of drinking coffee have been debated for decades, new research from the University of South Australia reveals that drinking six or more coffees a day can be detrimental to your health, increasing your risk of heart disease by up to 22 per cent. In Australia, one in six people are affected by cardiovascular disease. It is a major cause of death with one person dying from the disease every 12 minutes. According to the World Health Organization, cardiovascular disease is the leading cause of death, yet one of the most preventable. Investigating the association of long-term coffee consumption and cardiovascular disease, UniSA researchers Dr Ang Zhou and Professor Elina Hyppönen of the Australian Centre for Precision Health say their research confirms the point at which excess caffeine can cause high blood pressure, a precursor to heart disease. This is the first time an upper limit has been placed on safe coffee consumption and cardiovascular health. "Coffee is the most commonly consumed stimulant in the world -- it wakes us up, boosts our energy and helps us focus -- but people are always asking 'How much caffeine is too much?'," Prof Hyppönen says. "Most people would agree that if you drink a lot of coffee, you might feel jittery, irritable or perhaps even nauseas -- that's because caffeine helps your body work faster and harder, but it is also likely to suggest that you may have reached your limit for the time being. "We also know that risk of cardiovascular disease increases with high blood pressure, a known consequence of excess caffeine consumption. "In order to maintain a healthy heart and a healthy blood pressure, people must limit their coffees to fewer than six cups a day -- based on our data six was the tipping point where caffeine started to negatively affect cardiovascular risk." Using UK Biobank data of 347,077 participants aged 37-73 years, the study explored the ability of the caffeine-metabolizing gene (CYP1A2) to better process caffeine, identifying increased risks of cardiovascular disease in line with coffee consumption and genetic variations. Prof Hyppönen says that despite carriers of the fast-processing gene variation being four times quicker at metabolising caffeine, the research does not support the belief that these people could safely consume more caffeine, more frequently, without detrimental health effects. "An estimated three billion cups of coffee are enjoyed every day around the world," Prof Hyppönen says. "Knowing the limits of what's good for you and what's not is imperative. "As with many things, it's all about moderation; overindulge and your health will pay for it."
Markdown	[Skip to main content](https://www.sciencedaily.com/releases/2019/05/190510095102.htm#main) [![ScienceDaily](https://www.sciencedaily.com/images/sd-logo.png)](https://www.sciencedaily.com/ "ScienceDaily") *** Your source for the latest research news [Follow:](https://www.sciencedaily.com/releases/2019/05/190510095102.htm) [Facebook](https://www.facebook.com/sciencedaily) [X/Twitter](https://twitter.com/sciencedaily) [Subscribe:](https://www.sciencedaily.com/releases/2019/05/190510095102.htm) [RSS Feeds](https://www.sciencedaily.com/newsfeeds.htm) [Newsletter](https://sciencedaily.substack.com/) New\! Sign up for our free [email newsletter](https://sciencedaily.substack.com/). Science News from research organizations * # Coffee: How many cups are too much to drink a day? Date: May 12, 2019 Source: University of South Australia Summary: A morning coffee is an essential for many people looking to kick start their day. But while the humble coffee may be a vital feature of the daily grind, how much is too much? Share: [Facebook](https://www.sciencedaily.com/releases/2019/05/190510095102.htm) [Twitter](https://www.sciencedaily.com/releases/2019/05/190510095102.htm) [Pinterest](https://www.sciencedaily.com/releases/2019/05/190510095102.htm) [LinkedIN](https://www.sciencedaily.com/releases/2019/05/190510095102.htm) [Email](https://www.sciencedaily.com/releases/2019/05/190510095102.htm) FULL STORY * Latte, cappuccino or short black, a morning coffee is an essential for many people looking to kick start their day. But while the humble coffee may be a vital feature of the daily grind, how much is too much? While the pros and cons of drinking coffee have been debated for decades, new research from the University of South Australia reveals that drinking six or more coffees a day can be detrimental to your health, increasing your risk of heart disease by up to 22 per cent. In Australia, one in six people are affected by cardiovascular disease. It is a major cause of death with one person dying from the disease every 12 minutes. According to the World Health Organization, cardiovascular disease is the leading cause of death, yet one of the most preventable. Investigating the association of long-term coffee consumption and cardiovascular disease, UniSA researchers Dr Ang Zhou and Professor Elina Hyppönen of the Australian Centre for Precision Health say their research confirms the point at which excess caffeine can cause high blood pressure, a precursor to heart disease. This is the first time an upper limit has been placed on safe coffee consumption and cardiovascular health. "Coffee is the most commonly consumed stimulant in the world -- it wakes us up, boosts our energy and helps us focus -- but people are always asking 'How much caffeine is too much?'," Prof Hyppönen says. "Most people would agree that if you drink a lot of coffee, you might feel jittery, irritable or perhaps even nauseas -- that's because caffeine helps your body work faster and harder, but it is also likely to suggest that you may have reached your limit for the time being. "We also know that risk of cardiovascular disease increases with high blood pressure, a known consequence of excess caffeine consumption. "In order to maintain a healthy heart and a healthy blood pressure, people must limit their coffees to fewer than six cups a day -- based on our data six was the tipping point where caffeine started to negatively affect cardiovascular risk." Using UK Biobank data of 347,077 participants aged 37-73 years, the study explored the ability of the caffeine-metabolizing gene (CYP1A2) to better process caffeine, identifying increased risks of cardiovascular disease in line with coffee consumption and genetic variations. Prof Hyppönen says that despite carriers of the fast-processing gene variation being four times quicker at metabolising caffeine, the research does not support the belief that these people could safely consume more caffeine, more frequently, without detrimental health effects. "An estimated three billion cups of coffee are enjoyed every day around the world," Prof Hyppönen says. "Knowing the limits of what's good for you and what's not is imperative. "As with many things, it's all about moderation; overindulge and your health will pay for it." - [RELATED TOPICS](https://www.sciencedaily.com/releases/2019/05/190510095102.htm) - [Health & Medicine](https://www.sciencedaily.com/news/health_medicine/) - [Heart Disease](https://www.sciencedaily.com/news/health_medicine/heart_disease/) - [Workplace Health](https://www.sciencedaily.com/news/health_medicine/workplace_health/) - [Gastrointestinal Problems](https://www.sciencedaily.com/news/health_medicine/gastrointestinal_problems/) - [Pharmacology](https://www.sciencedaily.com/news/health_medicine/pharmacology/) - [Healthy Aging](https://www.sciencedaily.com/news/health_medicine/healthy_aging/) - [Diseases and Conditions](https://www.sciencedaily.com/news/health_medicine/diseases_and_conditions/) - [Chronic Illness](https://www.sciencedaily.com/news/health_medicine/chronic_illness/) - [Disability](https://www.sciencedaily.com/news/health_medicine/disability/) - [RELATED TERMS](https://www.sciencedaily.com/releases/2019/05/190510095102.htm) - [Delayed sleep phase syndrome](https://www.sciencedaily.com/terms/delayed_sleep_phase_syndrome.htm) - [Coffee](https://www.sciencedaily.com/terms/coffee.htm) - [Essential nutrient](https://www.sciencedaily.com/terms/essential_nutrient.htm) - [Microorganism](https://www.sciencedaily.com/terms/microorganism.htm) - [Fever](https://www.sciencedaily.com/terms/fever.htm) - [Caffeine](https://www.sciencedaily.com/terms/caffeine.htm) - [Nutrition](https://www.sciencedaily.com/terms/nutrition.htm) - [Zone diet](https://www.sciencedaily.com/terms/zone_diet.htm) * Story Source: [Materials](https://www.unisa.edu.au/Media-Centre/Releases/2019/a-cup-of-joe-and-youre-good-to-go-under-6-a-day-and-youre-a-ok/#.XNT2Y7hS_V8) provided by [University of South Australia*](https://www.unisa.edu.au/). Note: Content may be edited for style and length.* * Journal Reference: 1. Ang Zhou, Elina Hyppönen. Long-term coffee consumption, caffeine metabolism genetics, and risk of cardiovascular disease: a prospective analysis of up to 347,077 individuals and 8368 cases*. The American Journal of Clinical Nutrition, 2019; 109 (3): 509 DOI: [10\.1093/ajcn/nqy297](http://dx.doi.org/10.1093/ajcn/nqy297) Cite This Page*: - [MLA](https://www.sciencedaily.com/releases/2019/05/190510095102.htm#citation_mla) - [APA](https://www.sciencedaily.com/releases/2019/05/190510095102.htm#citation_apa) - [Chicago](https://www.sciencedaily.com/releases/2019/05/190510095102.htm#citation_chicago) University of South Australia. "Coffee: How many cups are too much to drink a day?." ScienceDaily. ScienceDaily, 12 May 2019. \<www.sciencedaily.com / releases / 2019 / 05 / 190510095102.htm\>. University of South Australia. (2019, May 12). Coffee: How many cups are too much to drink a day?. ScienceDaily. Retrieved April 1, 2026 from www.sciencedaily.com / releases / 2019 / 05 / 190510095102.htm University of South Australia. "Coffee: How many cups are too much to drink a day?." ScienceDaily. www.sciencedaily.com / releases / 2019 / 05 / 190510095102.htm (accessed April 1, 2026). ## Explore More from ScienceDaily RELATED STORIES * [Your Daily Coffee May Be Protecting Your Brain, 43-Year Study Finds](https://www.sciencedaily.com/releases/2026/03/260318033138.htm) Mar. 18, 2026 Your morning coffee or tea could be quietly supporting your brain health. A long-term study found that moderate consumption of caffeinated coffee or tea was linked to an 18% lower risk of dementia ... [Black Coffee, Longer Life: The Science Behind Your Morning Perk](https://www.sciencedaily.com/releases/2025/06/250617014142.htm) June 17, 2025 Coffee might be doing more than fueling your morning routine it could be extending your life. 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They split the coffee into two regions to examine whether uneven flow does in fact make weaker espresso. ... 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Financial support for ScienceDaily comes from advertisements and referral programs. Share this page ... Coffee: How many cups are too much to drink a day?** <https://www.sciencedaily.com/releases/2019/05/190510095102.htm> A morning coffee is an essential for many people looking to kick start their day. But while the humble coffee may be a vital feature of the daily grind, how much is too much? [Facebook](https://www.sciencedaily.com/releases/2019/05/190510095102.htm) [Twitter](https://www.sciencedaily.com/releases/2019/05/190510095102.htm) [Pinterest](https://www.sciencedaily.com/releases/2019/05/190510095102.htm) [LinkedIN](https://www.sciencedaily.com/releases/2019/05/190510095102.htm) [Email](https://www.sciencedaily.com/releases/2019/05/190510095102.htm) Close
Readable Markdown	Latte, cappuccino or short black, a morning coffee is an essential for many people looking to kick start their day. But while the humble coffee may be a vital feature of the daily grind, how much is too much? While the pros and cons of drinking coffee have been debated for decades, new research from the University of South Australia reveals that drinking six or more coffees a day can be detrimental to your health, increasing your risk of heart disease by up to 22 per cent. In Australia, one in six people are affected by cardiovascular disease. It is a major cause of death with one person dying from the disease every 12 minutes. According to the World Health Organization, cardiovascular disease is the leading cause of death, yet one of the most preventable. Investigating the association of long-term coffee consumption and cardiovascular disease, UniSA researchers Dr Ang Zhou and Professor Elina Hyppönen of the Australian Centre for Precision Health say their research confirms the point at which excess caffeine can cause high blood pressure, a precursor to heart disease. This is the first time an upper limit has been placed on safe coffee consumption and cardiovascular health. "Coffee is the most commonly consumed stimulant in the world -- it wakes us up, boosts our energy and helps us focus -- but people are always asking 'How much caffeine is too much?'," Prof Hyppönen says. "Most people would agree that if you drink a lot of coffee, you might feel jittery, irritable or perhaps even nauseas -- that's because caffeine helps your body work faster and harder, but it is also likely to suggest that you may have reached your limit for the time being. "We also know that risk of cardiovascular disease increases with high blood pressure, a known consequence of excess caffeine consumption. "In order to maintain a healthy heart and a healthy blood pressure, people must limit their coffees to fewer than six cups a day -- based on our data six was the tipping point where caffeine started to negatively affect cardiovascular risk." Using UK Biobank data of 347,077 participants aged 37-73 years, the study explored the ability of the caffeine-metabolizing gene (CYP1A2) to better process caffeine, identifying increased risks of cardiovascular disease in line with coffee consumption and genetic variations. Prof Hyppönen says that despite carriers of the fast-processing gene variation being four times quicker at metabolising caffeine, the research does not support the belief that these people could safely consume more caffeine, more frequently, without detrimental health effects. "An estimated three billion cups of coffee are enjoyed every day around the world," Prof Hyppönen says. "Knowing the limits of what's good for you and what's not is imperative. "As with many things, it's all about moderation; overindulge and your health will pay for it."
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