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| Meta Description | Melatonin supplements are a common solution for people who may struggle with insomnia. Taking magnesium supplements may help melatonin work more effectively. | |||||||||
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| Boilerpipe Text | Magnesium and melatonin are both popular supplements among people looking to get more shuteye—but can combining them improve your sleep? It's possible. Some research shows a joint magnesium-melatonin supplement may improve sleep quality, but more high-quality, large-scale studies are needed to confirm this.
Research on taking magnesium and melatonin together is limited, but some studies suggest it may help certain people sleep better.
One study looking at magnesium and melatonin co-supplementation in women with polycystic ovary syndrome (PCOS) found that taking the two supplements together had "beneficial effects on sleep quality."
In another study, taking a combined magnesium and melatonin supplement for four weeks helped people with sleep disturbances slightly improve their sleep quality.
The mechanisms here aren't totally clear, but the way magnesium and melatonin interact may indirectly promote sleep.
"Magnesium does have an effect on melatonin levels,"
Marie van der Merwe, PhD
, coordinator of the applied physiology and nutrition doctoral program at the University of Memphis, toldÂ
Health
. “The amount of magnesium you have can affect how well you synthesize melatonin.”
But you may not need to take the supplements at the same time to reap their benefits, said van der Merwe, who suggested it's fine to take a magnesium supplement in the morning and melatonin before bed.
The gist: There could be a connection between magnesium, melatonin, and sleep, but more research is needed for confirmation.
Magnesium is an essential mineral that helps regulate nerve and muscle function, blood pressure, and blood sugar levels, and is involved in the production of bone, protein, and DNA.
It's also become a popular supplement used to support sleep—but it doesn't come without risks.
Benefits of Magnesium for Sleep
Some research has found an association between magnesium supplementation and sleep by:
Improving sleep quality:
Getting enough magnesium through diet or supplementation
may help improve sleep quality
and anxiety in people with a deficiency.
Relieving muscle tension:
Magnesium can help relax muscles and reduce tension, contributing to better sleep.
Risks of Magnesium for Sleep
Using magnesium for sleep hasn't been well studied. Additionally, supplements aren't regulated by the FDA for safety and effectiveness, and come with their own set of risks when used. When using magnesium for sleep, it might:
Take longer to start working:
It
might take several weeks
before you start to see improvements with sleep from magnesium.
Cause unpleasant side effects:
Taking higher doses of magnesium can lead to diarrhea, nausea, and abdominal cramping.
Interact with other medications:
When taken with magnesium, some medications may become less effective, or cause additional side effects. Check in with your doctor about potential interactions before starting a new supplement or medication.
Melatonin is a popular supplement to help with sleep—but it's actually a hormone your body naturally produces to regulate when you fall sleep and wake up each day.
“Melatonin is in charge of running the [internal] clock, and it really is important for regulating your circadian rhythms,” van der Merwe said.
Benefits of Melatonin for Sleep
Works as-needed:
Unlike magnesium, melatonin tends to work as soon as you take it, making it helpful for the occasional sleepless night.
May help you fall asleep faster
: Research shows melatonin helped some people fall asleep about nine minutes faster with a 2-milligram dose compared to placebo.
Supports sleep timing issues
: Melatonin may help shift workers, those with jet lag, or people with sleep timing issues regulate their sleep patterns.
Risks of Melatonin for Sleep
Though melatonin can help some people who are having a hard time getting their sleep schedule on track, it can’t fix all sleep disorders that may be caused by other issues, van der Merwe said. Melatonin supplements also carry their own risks, as they're not regulated by the FDA.
Long-term effects of melatonin are unclear:
There's not enough long-term safety data on melatonin for sleep disorders.
May interact with other medications:
Melatonin can interact with certain medications, including antibiotics, antidepressants, and birth control pills.
Carries risks for certain groups:
Melatonin is not recommended for children or those with dementia; it should also be used with caution by people who have seizures or those on blood thinners.
It’s best to speak with a healthcare provider, such as a primary care physician, before trying any new supplements or supplement combinations, including magnesium and melatonin.
Van der Merwe noted that sleep issues may be caused by something supplementation won’t fix. Difficulty sleeping has been linked to cardiovascular disease, type 2 diabetes, depression, and other health conditions.
If you're still interested in trying one or both supplements, your doctor can help you assess the best time of day to take a magnesium supplement, a melatonin supplement, or one that combines both.
“Melatonin [should] get increased at nighttime,” van der Merwe explained, so you need to take the supplement “at a very specific time during the day. If you take melatonin in the morning, you screw up the whole [internal] clock.”
Though supplements said to support sleep, like magnesium and melatonin, have become popular in recent years, it’s ultimately worth checking with someone before you take them to establish whether they may help you.
“It’s important for people to realize it’s not a sleeping pill,” van der Merwe said. “You’re affecting the intrinsic machinery of your body—you’re slowly tuning it to function optimally—so it really is important for people to reflect on what might be the issue.” | |||||||||
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# What Happens When You Take Magnesium and Melatonin for Sleep
By [Health Editorial Team](https://www.health.com/health-editorial-team-5270189)
Published on March 17, 2026
Fact checked by
[Nick Blackmer](https://www.health.com/nick-blackmer-6748734)
![Nick Blackmer, MLIS]()
:max_bytes\(150000\):strip_icc\(\)/untitled-5582-Edit-d19315b04e5a4b7e85ec15100d87de46.jpg)
Fact checked by [Nick Blackmer](https://www.health.com/nick-blackmer-6748734)
Nick Blackmer is a librarian, fact-checker, and researcher with more than 20 years of experience in consumer-facing health and wellness content.
[health's fact checking process](https://www.health.com/health-com-s-editorial-process-5224046#toc-fact-checkers-maintain-our-editorial-standards)
Close
:max_bytes\(150000\):strip_icc\(\)/Health-GettyImages-1295017414-b004a1a3ffcd457a82226be4aaabd4a4.png)
:max_bytes\(150000\):strip_icc\(\)/Health-GettyImages-1295017414-b004a1a3ffcd457a82226be4aaabd4a4.png)
Magnesium may have an effect on your body's ability to synthesize melatonin, but more research is needed.
Nutthaseth Vanchaichana / Getty Images
- Magnesium and melatonin may help support better sleep—magnesium improves muscle relaxation and melatonin regulates sleep timing.
- Though both may be beneficial for sleep, there's very limited research on their combined effects.
- Consult a healthcare professional before combining supplements to ensure safety.
Magnesium and melatonin are both popular supplements among people looking to get more shuteye—but can combining them improve your sleep? It's possible. Some research shows a joint magnesium-melatonin supplement may improve sleep quality, but more high-quality, large-scale studies are needed to confirm this.
## Combining Magnesium and Melatonin to Support Sleep
Research on taking magnesium and melatonin together is limited, but some studies suggest it may help certain people sleep better.
One study looking at magnesium and melatonin co-supplementation in women with polycystic ovary syndrome (PCOS) found that taking the two supplements together had "beneficial effects on sleep quality." In another study, taking a combined magnesium and melatonin supplement for four weeks helped people with sleep disturbances slightly improve their sleep quality.
The mechanisms here aren't totally clear, but the way magnesium and melatonin interact may indirectly promote sleep.
"Magnesium does have an effect on melatonin levels," [Marie van der Merwe, PhD](https://www.memphis.edu/healthsciences/about/faculty/marievandermerwe.php), coordinator of the applied physiology and nutrition doctoral program at the University of Memphis, told *Health*. “The amount of magnesium you have can affect how well you synthesize melatonin.”
But you may not need to take the supplements at the same time to reap their benefits, said van der Merwe, who suggested it's fine to take a magnesium supplement in the morning and melatonin before bed.
The gist: There could be a connection between magnesium, melatonin, and sleep, but more research is needed for confirmation.
## Magnesium and Sleep
Magnesium is an essential mineral that helps regulate nerve and muscle function, blood pressure, and blood sugar levels, and is involved in the production of bone, protein, and DNA. It's also become a popular supplement used to support sleep—but it doesn't come without risks.
### Benefits of Magnesium for Sleep
Some research has found an association between magnesium supplementation and sleep by:
- **Improving sleep quality:** Getting enough magnesium through diet or supplementation [may help improve sleep quality](https://www.health.com/magnesium-drink-before-bed-11920427) and anxiety in people with a deficiency.
- **Relieving muscle tension:** Magnesium can help relax muscles and reduce tension, contributing to better sleep.
### Risks of Magnesium for Sleep
Using magnesium for sleep hasn't been well studied. Additionally, supplements aren't regulated by the FDA for safety and effectiveness, and come with their own set of risks when used. When using magnesium for sleep, it might:
- **Take longer to start working:** It [might take several weeks](https://www.health.com/how-long-magnesium-takes-to-work-for-sleep-11868262) before you start to see improvements with sleep from magnesium.
- **Cause unpleasant side effects:** Taking higher doses of magnesium can lead to diarrhea, nausea, and abdominal cramping.
- **Interact with other medications:** When taken with magnesium, some medications may become less effective, or cause additional side effects. Check in with your doctor about potential interactions before starting a new supplement or medication.
## Melatonin and Sleep
Melatonin is a popular supplement to help with sleep—but it's actually a hormone your body naturally produces to regulate when you fall sleep and wake up each day. “Melatonin is in charge of running the \[internal\] clock, and it really is important for regulating your circadian rhythms,” van der Merwe said.
### Benefits of Melatonin for Sleep
- **Works as-needed:** Unlike magnesium, melatonin tends to work as soon as you take it, making it helpful for the occasional sleepless night.
- **May help you fall asleep faster**: Research shows melatonin helped some people fall asleep about nine minutes faster with a 2-milligram dose compared to placebo.
- **Supports sleep timing issues**: Melatonin may help shift workers, those with jet lag, or people with sleep timing issues regulate their sleep patterns.
### Risks of Melatonin for Sleep
Though melatonin can help some people who are having a hard time getting their sleep schedule on track, it can’t fix all sleep disorders that may be caused by other issues, van der Merwe said. Melatonin supplements also carry their own risks, as they're not regulated by the FDA.
- **Long-term effects of melatonin are unclear:** There's not enough long-term safety data on melatonin for sleep disorders.
- **May interact with other medications:** Melatonin can interact with certain medications, including antibiotics, antidepressants, and birth control pills.
- **Carries risks for certain groups:** Melatonin is not recommended for children or those with dementia; it should also be used with caution by people who have seizures or those on blood thinners.
## What to Consider Before Taking Magnesium and Melatonin Together
It’s best to speak with a healthcare provider, such as a primary care physician, before trying any new supplements or supplement combinations, including magnesium and melatonin.
Van der Merwe noted that sleep issues may be caused by something supplementation won’t fix. Difficulty sleeping has been linked to cardiovascular disease, type 2 diabetes, depression, and other health conditions.
If you're still interested in trying one or both supplements, your doctor can help you assess the best time of day to take a magnesium supplement, a melatonin supplement, or one that combines both.
“Melatonin \[should\] get increased at nighttime,” van der Merwe explained, so you need to take the supplement “at a very specific time during the day. If you take melatonin in the morning, you screw up the whole \[internal\] clock.”
Though supplements said to support sleep, like magnesium and melatonin, have become popular in recent years, it’s ultimately worth checking with someone before you take them to establish whether they may help you.
“It’s important for people to realize it’s not a sleeping pill,” van der Merwe said. “You’re affecting the intrinsic machinery of your body—you’re slowly tuning it to function optimally—so it really is important for people to reflect on what might be the issue.”
Read more:
- [Wellness](https://www.health.com/wellness)
- [Nutrition](https://www.health.com/nutrition)
- [Vitamins and Supplements](https://www.health.com/nutrition/vitamins-supplements)
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12 Sources
Health.com uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our [editorial process](https://www.health.com/health-com-s-editorial-process-5224046) to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.
1. Alizadeh M, Karandish M, Asghari Jafarabadi M, et al. [Metabolic and hormonal effects of melatonin and/or magnesium supplementation in women with polycystic ovary syndrome: a randomized, double-blind, placebo-controlled trial](https://doi.org/10.1186/s12986-021-00586-9). *Nutr Metab (Lond)*. 2021;18(1):57. Published 2021 Jun 6. doi:10.1186/s12986-021-00586-9
2. Carlos RM, Matias CN, Cavaca ML, et al. [The effects of melatonin and magnesium in a novel supplement delivery system on sleep scores, body composition and metabolism in otherwise healthy individuals with sleep disturbances](https://doi.org/10.1080/07420528.2024.2353225). *Chronobiol Int*. 2024;41(6):817-828. doi:10.1080/07420528.2024.2353225
3. National Institutes of Health Office of Dietary Supplements. [Magnesium: fact sheet for health professionals](https://ods.od.nih.gov/factsheets/Magnesium-HealthProfessional/).
4. Rawji A, Peltier MR, Mourtzanakis K, et al. [Examining the Effects of Supplemental Magnesium on Self-Reported Anxiety and Sleep Quality: A Systematic Review](https://doi.org/10.7759/cureus.59317). *Cureus*. 2024;16(4):e59317. Published 2024 Apr 29. doi:10.7759/cureus.59317
5. Arab A, Rafie N, Amani R, Shirani F. [The Role of Magnesium in Sleep Health: a Systematic Review of Available Literature](https://doi.org/10.1007/s12011-022-03162-1). *Biol Trace Elem Res*. 2023;201(1):121-128. doi:10.1007/s12011-022-03162-1
6. Zhang Y, Chen C, Lu L, et al. [Association of magnesium intake with sleep duration and sleep quality: findings from the CARDIA study](https://doi.org/10.1093/sleep/zsab276). *Sleep*. 2022;45(4):zsab276. doi:10.1093/sleep/zsab276
7. National Institutes of Health Office of Dietary Supplements. [Magnesium](https://ods.od.nih.gov/factsheets/Magnesium-HealthProfessional/).
8. National Center for Complementary and Integrative Health. [Melatonin: what you need to know](https://www.nccih.nih.gov/health/melatonin-what-you-need-to-know).
9. Cruz-Sanabria F, Bruno S, Crippa A, et al. [Optimizing the time and dose of melatonin as a sleep-promoting drug: A systematic review of randomized controlled trials and dose-response meta-analysis](https://doi.org/10.1111/jpi.12985). *J Pineal Res*. 2024;76(5):e12985. doi:10.1111/jpi.12985
10. Sateia MJ, Buysse DJ, Krystal AD, et al. [Clinical practice guideline for the pharmacologic treatment of chronic insomnia in adults: An American Academy of Sleep Medicine clinical practice guideline](https://doi.org/10.5664/jcsm.6470). *J Clin Sleep Med*. 2017;13(2):307-349. Published 2017 Feb 15. doi:10.5664/jcsm.6470
11. Givler D, Givler A, Luther PM, et al. [Chronic administration of melatonin: Physiological and clinical considerations](https://doi.org/10.3390/neurolint15010031). *Neurol Int*. 2023;15(1):518-533. Published 2023 Mar 15. doi:10.3390/neurolint15010031
12. Centers for Disease Control and Prevention. [Sleep and chronic disease](https://www.cdc.gov/sleep/about_sleep/chronic_disease.html).
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[![A young woman taking supplements for insomnia before bed]() :max_bytes\(150000\):strip_icc\(\)/Health-GettyImages-SupplementsForInsomnia-487facc86cf445e08b6d1d78d38fbccd.jpg) 11 Supplements To Help You Get Your Best Night's Sleep](https://www.health.com/supplements-for-sleep-8777079)
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| Readable Markdown | Magnesium and melatonin are both popular supplements among people looking to get more shuteye—but can combining them improve your sleep? It's possible. Some research shows a joint magnesium-melatonin supplement may improve sleep quality, but more high-quality, large-scale studies are needed to confirm this.
Research on taking magnesium and melatonin together is limited, but some studies suggest it may help certain people sleep better.
One study looking at magnesium and melatonin co-supplementation in women with polycystic ovary syndrome (PCOS) found that taking the two supplements together had "beneficial effects on sleep quality." In another study, taking a combined magnesium and melatonin supplement for four weeks helped people with sleep disturbances slightly improve their sleep quality.
The mechanisms here aren't totally clear, but the way magnesium and melatonin interact may indirectly promote sleep.
"Magnesium does have an effect on melatonin levels," [Marie van der Merwe, PhD](https://www.memphis.edu/healthsciences/about/faculty/marievandermerwe.php), coordinator of the applied physiology and nutrition doctoral program at the University of Memphis, told *Health*. “The amount of magnesium you have can affect how well you synthesize melatonin.”
But you may not need to take the supplements at the same time to reap their benefits, said van der Merwe, who suggested it's fine to take a magnesium supplement in the morning and melatonin before bed.
The gist: There could be a connection between magnesium, melatonin, and sleep, but more research is needed for confirmation.
Magnesium is an essential mineral that helps regulate nerve and muscle function, blood pressure, and blood sugar levels, and is involved in the production of bone, protein, and DNA. It's also become a popular supplement used to support sleep—but it doesn't come without risks.
### Benefits of Magnesium for Sleep
Some research has found an association between magnesium supplementation and sleep by:
- **Improving sleep quality:** Getting enough magnesium through diet or supplementation [may help improve sleep quality](https://www.health.com/magnesium-drink-before-bed-11920427) and anxiety in people with a deficiency.
- **Relieving muscle tension:** Magnesium can help relax muscles and reduce tension, contributing to better sleep.
### Risks of Magnesium for Sleep
Using magnesium for sleep hasn't been well studied. Additionally, supplements aren't regulated by the FDA for safety and effectiveness, and come with their own set of risks when used. When using magnesium for sleep, it might:
- **Take longer to start working:** It [might take several weeks](https://www.health.com/how-long-magnesium-takes-to-work-for-sleep-11868262) before you start to see improvements with sleep from magnesium.
- **Cause unpleasant side effects:** Taking higher doses of magnesium can lead to diarrhea, nausea, and abdominal cramping.
- **Interact with other medications:** When taken with magnesium, some medications may become less effective, or cause additional side effects. Check in with your doctor about potential interactions before starting a new supplement or medication.
Melatonin is a popular supplement to help with sleep—but it's actually a hormone your body naturally produces to regulate when you fall sleep and wake up each day. “Melatonin is in charge of running the \[internal\] clock, and it really is important for regulating your circadian rhythms,” van der Merwe said.
### Benefits of Melatonin for Sleep
- **Works as-needed:** Unlike magnesium, melatonin tends to work as soon as you take it, making it helpful for the occasional sleepless night.
- **May help you fall asleep faster**: Research shows melatonin helped some people fall asleep about nine minutes faster with a 2-milligram dose compared to placebo.
- **Supports sleep timing issues**: Melatonin may help shift workers, those with jet lag, or people with sleep timing issues regulate their sleep patterns.
### Risks of Melatonin for Sleep
Though melatonin can help some people who are having a hard time getting their sleep schedule on track, it can’t fix all sleep disorders that may be caused by other issues, van der Merwe said. Melatonin supplements also carry their own risks, as they're not regulated by the FDA.
- **Long-term effects of melatonin are unclear:** There's not enough long-term safety data on melatonin for sleep disorders.
- **May interact with other medications:** Melatonin can interact with certain medications, including antibiotics, antidepressants, and birth control pills.
- **Carries risks for certain groups:** Melatonin is not recommended for children or those with dementia; it should also be used with caution by people who have seizures or those on blood thinners.
It’s best to speak with a healthcare provider, such as a primary care physician, before trying any new supplements or supplement combinations, including magnesium and melatonin.
Van der Merwe noted that sleep issues may be caused by something supplementation won’t fix. Difficulty sleeping has been linked to cardiovascular disease, type 2 diabetes, depression, and other health conditions.
If you're still interested in trying one or both supplements, your doctor can help you assess the best time of day to take a magnesium supplement, a melatonin supplement, or one that combines both.
“Melatonin \[should\] get increased at nighttime,” van der Merwe explained, so you need to take the supplement “at a very specific time during the day. If you take melatonin in the morning, you screw up the whole \[internal\] clock.”
Though supplements said to support sleep, like magnesium and melatonin, have become popular in recent years, it’s ultimately worth checking with someone before you take them to establish whether they may help you.
“It’s important for people to realize it’s not a sleeping pill,” van der Merwe said. “You’re affecting the intrinsic machinery of your body—you’re slowly tuning it to function optimally—so it really is important for people to reflect on what might be the issue.” | |||||||||
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