Magnesium Glycinate: Benefits, Side Effects, Dosage, and What It Is Good For
Written by Abdul Rasheed
Abdul Rasheed is the founder and lead editor of Diabetes Knowledge Hub.
A long-time independent researcher of diabetes management and natural health strategies, he leads the site’s content direction, writing, and editorial decisions.
Medical Reviewer Wendy Castle
MPH, RD, LD, CDCES is a Registered Dietitian and Certified Diabetes Care and Education Specialist based in the United States.
She reviews Diabetes Knowledge Hub articles for medical accuracy against current ADA Standards of Care, with expertise in diabetes management, nutrition counseling, and evidence-based nutrition care.
Magnesium is an essential mineral. It helps the body make energy, supports muscle and nerve function, helps keep bones healthy and plays a role in normal blood pressure. It is involved in more than 300 enzyme systems. U.S. diet surveys show that many adults eat less magnesium than recommended. This does not mean that every person with a low intake has a magnesium deficiency (NIH Office of Dietary Supplements).
Magnesium glycinate, also called magnesium bisglycinate, is one form sold as a magnesium glycinate supplement. Some people choose it because they hope it will be easier on the stomach. However, good studies that compare it directly with citrate and other forms are limited. Research on magnesium in general does not prove that magnesium glycinate improves sleep, anxiety, blood sugar or other health conditions.
This guide is written mainly for U.S. adults. It uses U.S. dietary reference values and American English. It explains what magnesium glycinate is, what research does and does not show, how it compares with citrate, how to read dosage labels, and what to know about side effects and medicine interactions. It is for education, not personal medical advice.
What Is Magnesium Glycinate?
Magnesium glycinate is a form of magnesium. In this supplement, magnesium is joined to glycine. Glycine is a small building block of protein called an amino acid. Magnesium bisglycinate usually means that one magnesium ion is joined to two glycine molecules. Some makers use “glycinate” and “bisglycinate” in similar ways. Check the Supplement Facts panel for the amount of elemental magnesium in each serving. This is the actual amount of magnesium the product provides. It is not the total weight of the full compound.
What Is Glycinate?
Glycine is an amino acid. The body uses amino acids to build proteins. Glycine also helps send signals in the nervous system. But the fact that magnesium glycinate contains glycine does not prove that it has a strong calming or sleep effect.
It is not correct to say that the whole magnesium-glycinate compound is absorbed through special amino-acid transporters or that this makes it easier to absorb. Magnesium absorption depends on several things. These include how well the product dissolves, the dose, a person’s magnesium levels and gut health. Human studies have not clearly shown that magnesium glycinate is absorbed better than magnesium citrate.
Why the Form of Magnesium Matters
A product may say “500 mg magnesium glycinate” on the front. This may refer to the weight of the whole compound, not 500 mg of elemental magnesium. The amount of actual magnesium depends on the product’s formula. Check the Supplement Facts panel and look for the line called “Magnesium.” Use that number when comparing products.
Magnesium oxide contains more elemental magnesium by weight, but small studies suggest the body may absorb less of it than some forms that dissolve more easily. One study reported low absorption for magnesium oxide. This result should not be treated as a fixed rate for everyone or as proof that glycinate is better than citrate (Firoz & Graber, 2001).
What Is Magnesium Glycinate Good For?
Magnesium helps nerves and muscles work. It also helps the body make energy and maintain healthy bones. Magnesium glycinate adds magnesium to the diet, but research on this form is limited. People often ask about it for sleep, anxiety, blood sugar, bone health, heart health, PMS, migraine and exercise recovery. The evidence is not the same for each use. Most studies look at magnesium in general, not magnesium glycinate.
Magnesium Glycinate for Sleep
Magnesium helps nerves work and plays a role in normal body functions linked to sleep. A 2025 randomized, double-blind trial studied 155 adults who said they had poor sleep. They took either magnesium bisglycinate, which provided 250 mg of elemental magnesium each day, or a placebo for four weeks.
The supplement group had a slightly greater drop in Insomnia Severity Index scores. The effect was small (Cohen’s d = 0.2; p = 0.049). The study found no clear difference in the other mental health measures. The supplement contained both magnesium and glycine, so the study cannot show which ingredient caused the change, if either did. It used self-reported measures. It does not prove that magnesium glycinate treats long-term insomnia or other sleep disorders (Schuster et al., 2025).
This is an early finding and needs to be repeated in other studies. It does not prove that glycine alone improves sleep, that the supplement restores GABA receptor activity, or that it must be taken one to two hours before bed. If sleep problems continue, ask a healthcare professional about possible causes such as sleep apnea, medicine effects, pain or mood conditions.
Anxiety and Stress Response
Magnesium helps nerves work. Low magnesium levels may also occur with health problems that affect mood. A review of 18 studies found some signs that magnesium supplements may ease self-reported anxiety in certain groups. But the results were mixed, and the studies differed in quality. The review did not show that magnesium glycinate treats anxiety (Boyle et al., 2017).
Claims that stress always lowers magnesium through a cortisol feedback loop go beyond the evidence. There is also no proof that magnesium glycinate is the best form for anxiety. Supplements should not replace an assessment or proven treatment for an anxiety disorder. Speak with a qualified healthcare professional if anxiety continues.
Blood Sugar and Insulin Resistance
Magnesium helps the body use sugar and respond to insulin. Some studies link low magnesium intake or low blood levels with a higher risk of type 2 diabetes. But this link does not prove that a supplement prevents diabetes or lowers blood sugar. Studies of magnesium in people with diabetes have had mixed results. Most did not test magnesium glycinate alone.
The American Diabetes Association’s 2026 Standards of Care do not advise magnesium or other vitamin and mineral supplements to lower blood sugar in people with diabetes. A supplement may be needed for another medical reason, such as a low magnesium level. There is no proof that magnesium glycinate is the best form for insulin resistance (ADA Standards of Care in Diabetes—2026; NIH ODS). See our guides to insulin resistance and insulin-resistance management.
Medical note: Do not use magnesium glycinate to treat diabetes. Do not change insulin, metformin, sulfonylureas or other prescribed medicines because of this supplement. Studies have not shown that magnesium supplements reliably lower blood sugar. The ADA does not advise routine magnesium supplements to improve blood sugar unless there is another medical reason, such as a deficiency. Ask your diabetes care team if a supplement is right for you. They can check your diet, test results, kidney function and medicines.
Bone Health
About 50%–60% of the body’s magnesium is stored in bone. Magnesium helps support bone structure and works with vitamin D and parathyroid hormone. Some studies link higher magnesium intake with stronger bones. But this does not prove that magnesium glycinate prevents broken bones or treats osteoporosis.
The NIH says more research is needed to know whether magnesium supplements help prevent or manage osteoporosis (NIH ODS magnesium fact sheet). Aim to get enough magnesium from a balanced diet. Follow a bone-health plan made with your clinician.
Cardiovascular Health
Magnesium helps the heart and blood vessels work normally. A lack of magnesium can contribute to an abnormal heart rhythm. Some studies link higher magnesium intake from food with lower heart risk. But these studies do not prove that magnesium glycinate prevents heart failure or heart disease.
Trials suggest that magnesium supplements may lower blood pressure by a small amount on average. They should not replace prescribed blood pressure medicine or other heart care (NIH ODS).
Premenstrual Syndrome (PMS)
Researchers have studied magnesium for premenstrual symptoms (PMS). But the evidence is not strong enough to say that magnesium glycinate treats PMS. A 2025 review looked at 31 randomized trials with 3,254 people. It found too little evidence to show that magnesium improves the mood-related symptoms of PMS. It also did not show an added benefit from taking magnesium glycinate with vitamin B6 (Robinson et al., 2025). Talk with a healthcare professional about severe or troubling PMS symptoms.
Migraine Prevention
Researchers have studied magnesium to help prevent migraine. Some clinical guidance considers it as an option, especially for migraine with aura. But the evidence is limited. Most studies looked at forms such as magnesium oxide or citrate, not magnesium glycinate.
Some migraine studies used 400–600 mg of elemental magnesium each day. This is above the adult upper limit of 350 mg per day from supplements and medicines. Do not try these higher amounts on your own. A healthcare professional should guide their use (NIH ODS; American Migraine Foundation).
Exercise Performance and Muscle Recovery
Magnesium helps the body make energy. It also helps muscles and nerves work. If you do not get enough magnesium, getting more may help. But extra magnesium does not reliably improve strength, stamina or recovery if your levels are already normal.
A review of trials found no clear gains in muscle fitness for most active adults who had enough magnesium (Wang et al., 2017). There is no good proof that magnesium glycinate lowers lactic acid or speeds muscle recovery.
Magnesium Glycinate vs Citrate and Other Forms: Which Is Best?
Magnesium supplements come in several forms. These include glycinate (bisglycinate), citrate, oxide, chloride, malate, taurate, threonate and sulfate. Each form has a different amount of elemental magnesium and may dissolve or act differently.
Studies that compare these forms in people are limited. There is no strong proof that one form is best for every health goal. Small studies found that citrate, chloride, lactate and aspartate may be absorbed more fully than magnesium oxide. The NIH does not say that magnesium glycinate is better than citrate.
Magnesium form |
Evidence and characteristics |
Elemental magnesium content |
|---|---|---|
Magnesium glycinate (bisglycinate)
|
Soluble magnesium chelate; direct comparisons with citrate are limited
|
Varies by product; check label
|
Magnesium citrate
|
Soluble form; also used in some laxative products
|
Varies by product
|
Magnesium malate
|
Magnesium salt of malic acid; form-specific benefits not established
|
Varies by product
|
Magnesium lactate
|
Magnesium salt; some studies compare absorption with oxide
|
Varies by product
|
Magnesium threonate
|
Studied for cognitive outcomes; clinical evidence remains limited
|
Relatively low elemental percentage
|
Magnesium taurate
|
Magnesium salt with taurine; comparative clinical evidence is limited
|
Varies by product
|
Magnesium oxide
|
High elemental magnesium by weight; lower fractional absorption in some studies
|
High elemental percentage
|
Magnesium chloride
|
Soluble form used in oral and topical products; topical absorption claims are uncertain
|
Varies by product
|
Magnesium sulfate
|
Used in specific medical settings and some laxative products
|
Varies by product
|
People often compare magnesium glycinate and magnesium citrate when choosing a supplement. Both provide elemental magnesium, but they can differ in use and stomach effects. Magnesium citrate is also used as a laxative and may cause loose stools, especially at higher doses.
Magnesium glycinate is often marketed as gentle on the stomach. But strong studies have not proved that it is better absorbed or works better than citrate. These are two ways to take magnesium, not proven treatments for different diseases. Choose based on the label, how you tolerate it, why you need it and advice from your clinician.
Natural Food Sources of Magnesium
Magnesium glycinate is not found naturally in food. Foods contain magnesium as part of their natural plant or animal tissues. Good sources include pumpkin seeds, nuts, beans, whole grains and leafy green vegetables. For most people, food is a practical way to get magnesium. These foods also provide fiber and other nutrients. See our guide to foods that support insulin-resistance management for more ideas.
Food Source |
Magnesium per Serving |
|---|---|
Pumpkin seeds (1 oz / 28 g)
|
156 mg
|
Dark chocolate 70–85% (1 oz)
|
64 mg
|
Almonds (1 oz)
|
77 mg
|
Spinach, cooked (½ cup)
|
78 mg
|
Black beans, cooked (½ cup)
|
60 mg
|
Edamame (½ cup)
|
50 mg
|
Avocado (1 whole)
|
58 mg
|
Brown rice, cooked (1 cup)
|
84 mg
|
Salmon, cooked (3 oz)
|
26 mg
|
Banana (1 medium)
|
32 mg
|
Whole wheat bread (2 slices)
|
46 mg
|
Low-fat yogurt (8 oz)
|
42 mg
|
Source: USDA FoodData Central. Magnesium amounts are approximate and may vary with food variety, brand, serving size and preparation method.
When grains are refined, the bran and germ are removed. These parts contain many of the grain’s minerals, including magnesium. The amount lost depends on the grain and how it is processed. There is no single percentage that applies to every refined food. Choosing whole grains more often can help increase magnesium in your diet.
Magnesium Glycinate Dosage: How Much Should You Take?
There is no set daily dose of magnesium glycinate. The Recommended Dietary Allowance (RDA) is the amount of magnesium most healthy people need each day from food, drinks and supplements combined. For U.S. adults, it is usually 310–320 mg per day for women and 400–420 mg per day for men. Needs differ during pregnancy and breastfeeding.
The adult Upper Limit (UL) is 350 mg per day from supplements and medicines that contain magnesium. This limit does not include magnesium in food. It is a safety limit, not a dose to aim for. It is not a treatment dose (NIH ODS).
The front of a product may show the weight of the whole magnesium glycinate compound. The Supplement Facts panel shows the amount of elemental magnesium, which is the actual magnesium in the serving. Use that amount when adding up magnesium from supplements, antacids and laxatives. Ask a healthcare professional if a supplement is right for you, especially if you have kidney disease or take regular medicines.
Guidance |
Recommendation |
|---|---|
Daily elemental magnesium target (adults)
|
310–320 mg/day for women; 400–420 mg/day for men. Includes food and supplements.
|
Typical supplemental dose
|
No standard supplemental dose for magnesium glycinate is established.
|
Starting dose (recommended)
|
No universal starting dose. Check elemental magnesium and discuss need with a clinician.
|
Common capsule formats available
|
Products may provide 100 mg per serving; this is a label strength, not a recommended dose.
|
Timing for sleep / anxiety
|
No proven best time; choose a consistent time that suits tolerance and clinician advice.
|
Timing for blood sugar / metabolic
|
Morning use is acceptable if it suits the person; timing does not establish greater effectiveness.
|
Morning dosing
|
Taking with food may improve tolerance for some people.
|
With or without food?
|
Either; with food reduces risk of mild nausea in sensitive individuals
|
Time to notice effects
|
No reliable time-to-benefit can be promised; evidence varies by outcome and population.
|
Upper Tolerable Intake Level (UL)
|
350 mg/day from supplements and magnesium-containing medicines for adults; food magnesium is excluded.
|
Can I Take Magnesium Glycinate in the Morning?
You can take magnesium glycinate in the morning or evening. There is no good evidence that one time works better for everyone. Follow the product label and your clinician’s advice. Taking it with food may help prevent stomach upset. If it causes discomfort, ask a pharmacist or clinician whether you should change the timing or split the dose. Do not take more just because you do not notice an effect right away.
The adult upper limit of 350 mg per day applies to magnesium from supplements and medicines, not magnesium in food. Higher doses are sometimes used for medical reasons, such as migraine prevention. Do not take these higher doses unless a healthcare professional advises you to.
Magnesium needs change during pregnancy and breastfeeding. The RDA includes magnesium from all sources, not just supplements. For adults, the pregnancy RDA is 350 mg per day at ages 19–30 and 360 mg per day at ages 31–50. During breastfeeding, it is 310–320 mg per day. The adult upper limit from supplements and medicines remains 350 mg per day.
People who are pregnant or breastfeeding should ask their obstetric clinician before using a magnesium product. People with chronic kidney disease or reduced kidney function also need medical advice. The kidneys help remove extra magnesium from the body.
Magnesium Glycinate Side Effects and Who Should Be Cautious
Common Side Effects
High doses of magnesium from supplements or medicines can cause diarrhea, nausea and stomach cramps. The risk depends on the dose, the form, a person’s tolerance and other sources of magnesium. These sources include magnesium antacids and laxatives. People may tolerate magnesium glycinate differently, but strong studies have not proved that it prevents stomach problems.
Very high magnesium levels can cause low blood pressure, vomiting, trouble breathing and an abnormal heart rhythm. The risk is higher when the kidneys do not work well, because they may not remove extra magnesium from the body (NIH ODS).
Who Should Not Take Magnesium Glycinate Without Medical Supervision
People with chronic kidney disease or reduced kidney function should not start magnesium supplements without medical advice. Healthy kidneys remove extra magnesium. If the kidneys do not work well, magnesium can build up in the blood. This is a concern for people who also use magnesium antacids or laxatives. Tell your healthcare professional about these products when you review your total magnesium intake.
Magnesium can stop the body from absorbing some antibiotics and oral bisphosphonates. As a general rule, take magnesium supplements at least two hours apart from oral bisphosphonates. Check the medicine label and ask a pharmacist, as the timing can differ. Antibiotic timing also depends on the drug. Follow the prescription or ask a pharmacist. Some water pills (diuretics) and long-term use of proton pump inhibitors can also affect magnesium levels. Check the Supplement Facts panel for added vitamin B6, vitamin D and zinc.
Drug Interactions
Magnesium can change how the body absorbs some medicines. Some medicines can also change magnesium levels. The effect depends on the drug and its form. The examples below are not a full medicine check. Ask a pharmacist to confirm timing and whether magnesium is safe with your medicines (NIH ODS).
Drug Class / Medication |
Interaction and Recommendation |
|---|---|
Diabetes medications (metformin, sulfonylureas, insulin)
|
Do not use magnesium as a glucose-lowering treatment or change diabetes medicines. Discuss supplementation with the diabetes care team.
|
Antibiotics — quinolones (ciprofloxacin) and tetracyclines (doxycycline)
|
Magnesium can reduce absorption of some oral quinolone and tetracycline antibiotics. Follow the specific medicine label or pharmacist's instructions for timing; spacing differs by antibiotic.
|
Bisphosphonates (alendronate, risedronate)
|
Magnesium can reduce absorption of oral bisphosphonates. Follow the medicine label and ask a pharmacist for the required separation interval.
|
Diuretics — loop and thiazide (furosemide, hydrochlorothiazide)
|
Loop and thiazide diuretics can increase urinary magnesium loss; potassium-sparing diuretics may reduce magnesium excretion. Monitoring depends on the medicine and kidney function.
|
Proton pump inhibitors (omeprazole, lansoprazole)
|
Long-term proton pump inhibitor use can cause low magnesium in some people. A clinician may check magnesium levels; supplementation is not automatically required.
|
Blood pressure medications (calcium channel blockers, ACE inhibitors)
|
Do not assume all blood-pressure medicines have a clinically important interaction with magnesium. Review the specific medicine and kidney function with a pharmacist.
|
Magnesium glycinate and potassium supplements
|
Potassium supplements can be risky in kidney disease or with certain medicines. Review potassium and magnesium products together with a clinician.
|
Affiliate disclosure: We may earn a commission if you purchase through links in this article, at no additional cost to you. This does not influence our editorial assessments or the research discussed above. Product listings are not medical recommendations.
Recommended Magnesium Glycinate Supplements: Capsules, Powders, and What to Look For
Dr. Berg Magnesium Glycinate
With Naturally Sourced Vitamin D3
Check current price
Review the current product label and Supplement Facts before deciding whether this product suits your needs. Check the current Supplement Facts panel for elemental magnesium per serving and all additional ingredients.
90 Capsules
Magnesium + D3
View Product →
Affiliate link · Price may change
Sports Research Magnesium Glycinate
Magnesium Glycinate Veggie Capsules
Check current price
Review the current Supplement Facts panel for elemental magnesium per serving, serving size and capsule count. Product formulations may change.
Check current Supplement Facts
Vegan Capsules
View Product →
Affiliate link · Price may change
Magnesium glycinate is sold as capsules and powders. The form of the product does not prove that it works better or is absorbed better. Compare products by checking the elemental magnesium per serving on the Supplement Facts panel. Also check the serving size, other ingredients, allergens, quality testing and maker’s contact details. A product that says 100 mg is not a dose that everyone should take. Independent testing can help check product quality. It does not prove that a supplement treats a health condition.
Frequently Asked Questions
Yes, magnesium glycinate can be taken in the morning or evening. There is no good evidence that one time is more effective for everyone. Follow the product directions and clinician advice. If it causes stomach upset, taking it with food may improve tolerance. Check the total elemental magnesium from all supplements and medicines.
Glycinate is the negatively charged form derived from glycine, an amino acid. In magnesium bisglycinate, magnesium is associated with two glycine molecules. The presence of glycine does not prove that a magnesium glycinate supplement has a sedative or clinically meaningful calming effect.
Possible downsides include cost, variation in elemental magnesium content, and the possibility of gastrointestinal effects such as diarrhoea, nausea or abdominal cramping at higher supplemental intakes. People with reduced kidney function may be at greater risk of magnesium accumulation and should seek medical advice before using supplements.
Daily use adds to total magnesium intake. Whether it is appropriate depends on dietary intake, the amount of elemental magnesium in the product, kidney function, health conditions and medicines. The adult upper limit for magnesium from supplements and magnesium-containing medicines is 350 mg/day unless a clinician recommends otherwise; magnesium in food is not included in this limit.
Magnesium is involved in normal glucose metabolism, and low magnesium status is associated with metabolic health risks. However, trials of magnesium supplements have mixed results, and the American Diabetes Association does not recommend routine magnesium supplementation for glycemic benefit. There is no evidence that magnesium glycinate is the preferred form for insulin resistance.
It is a way to add magnesium to the diet. Magnesium is needed for normal nerve and muscle function, energy metabolism and bone health. A small 2025 trial found a modest improvement in self-reported insomnia scores with magnesium bisglycinate, but evidence is preliminary. It is not an established treatment for diabetes, anxiety, cardiovascular disease or other medical conditions.
It may be useful for people whose magnesium intake is inadequate, but supplements are not necessary or risk-free for everyone. Check the elemental magnesium amount, consider food intake and medicines, and ask a clinician if you have kidney disease, are pregnant, or take regular medication. More magnesium is not necessarily better.
A 2025 randomized trial of 155 adults with self-reported poor sleep found a small improvement in Insomnia Severity Index scores after four weeks of magnesium bisglycinate providing 250 mg elemental magnesium daily compared with placebo. The effect was modest and needs replication. This does not establish magnesium glycinate as a treatment for chronic insomnia.
Some people may feel drowsy, but magnesium glycinate is not an established sedative and does not reliably make everyone sleepy. If you notice drowsiness, avoid driving or operating machinery until you know how it affects you, and ask a clinician or pharmacist whether dose or timing should be changed.
It depends on what the 500 mg refers to. If it is the weight of the magnesium glycinate compound, the elemental magnesium amount may be much lower and varies by formulation. If it is 500 mg of elemental magnesium from supplements, it exceeds the adult 350 mg/day upper limit for unsupervised supplemental intake. Check the Supplement Facts panel and ask a clinician before using higher amounts.
There is no reliable universal timeline. It depends on why it is being used, baseline magnesium status, dose and the outcome being measured. The sleep trial lasted four weeks and found a modest average change; it does not show that everyone will notice a benefit within one or two weeks. Do not increase the dose because you do not notice an immediate effect.
The terms are commonly used interchangeably for magnesium chelated with glycine, often with two glycine molecules associated with one magnesium ion. Product formulations can differ, so check the Supplement Facts panel for elemental magnesium and other ingredients rather than relying only on the product name.
Magnesium oxide contains a higher proportion of elemental magnesium by weight but is less completely absorbed than some more soluble forms in small studies. Magnesium glycinate is a chelated form, but direct comparisons with oxide and citrate are limited. Neither form is proven best for every health goal; compare elemental amounts, tolerance and the reason for use.
Combining forms adds to the total elemental magnesium intake. There is no reason to assume the combination is automatically safer or more effective. Keep track of magnesium from all supplements and medicines, and discuss combined use with a clinician—especially if you have kidney disease or take medicines that affect magnesium levels.
Medical Disclaimer: This article is for general education. It is not personal medical advice. It does not replace care from a qualified healthcare professional. Magnesium glycinate is a dietary supplement, not an FDA-approved treatment for diabetes, insomnia, anxiety or other diseases. Do not start, stop or change prescribed medicines because of this article. Ask a clinician or pharmacist before using supplements, especially if you have kidney disease, are pregnant or breastfeeding, or take prescription medicines. Get urgent medical help if you have signs of severe magnesium toxicity or another medical emergency.
References
Selected clinical trials, systematic reviews and authoritative health resources used in this guide. Evidence about magnesium generally should not automatically be interpreted as evidence for magnesium glycinate specifically.
- National Institutes of Health, Office of Dietary Supplements. Magnesium: Fact Sheet for Health Professionals. Dietary reference intakes, upper limits, safety and interactions.
- Schuster J, et al. (2025). Magnesium bisglycinate supplementation in adults with poor sleep: randomized, double-blind, placebo-controlled trial. Four-week trial; modest change in self-reported insomnia severity.
- Firoz M, Graber M. (2001). Bioavailability of US commercial magnesium preparations. Magnesium Research, 14(4), 257–262.
- Boyle NB, Lawton C, Dye L. (2017). The effects of magnesium supplementation on subjective anxiety and stress: a systematic review. Nutrients, 9(5), 429.
- Robinson et al. (2025). Magnesium supplementation and premenstrual symptoms: systematic review. Review of randomized trials; evidence for psychological PMS symptoms was insufficient.
- Wang R, et al. (2017). Magnesium supplementation and physical performance: systematic review and meta-analysis.
- American Diabetes Association. (2026). Standards of Care in Diabetes—2026. Nutrition therapy and micronutrient supplementation recommendations.
- American Migraine Foundation. Magnesium and migraine. Patient and clinician information on magnesium as a possible migraine-prevention option.