mineralNot FDA-approvedOTC supplementSold as a dietary supplement; the glycinate form is chosen for tolerability, not proven superiority
Magnesium GlycinateBenefits, Dosage & Interactions
Also known as: magnesium
Magnesium glycinate is a form of the essential mineral magnesium, chelated with the amino acid glycine. This chelation process means magnesium is bound to glycine molecules, which is thought to enhance its absorption and bioavailability compared to other forms of magnesium.
How much Magnesium Glycinate do people take?
500 mg of elemental magnesium daily in the insomnia trial; glycinate specifically has no separate outcome trial. Route reported: Oral. Frequency reported: Once daily in that trial. These are amounts documented in the cited studies and labels for Magnesium Glycinate — they are reported for reference, not a recommendation. Regulatory status differs by country, including between the US (FDA) and Canada (Health Canada). Confirm any amount with a licensed clinician before you take it.
See the full reported protocol and its sourcesResearched by DoseRoutine Research TeamReviewed for accuracy by Nicholas Alexander, RSE, SO, PMPLast updated Educational reference only — not medical advice. Always confirm dosing and safety decisions with a licensed clinician.
Evidence: Strong — 2 human randomized trials published.
Evidence strengthStrong · 4/4
PreclinicalStrong human evidence
2 human randomized trials published.
Whole-body biological half-life
Not applicable
Typical timing
in the evening
Default unit
mg
What published protocols report
Ranges documented in the literature, shown for reference. DoseRoutine does not recommend an amount — your prescriber or the product label sets the dose.
- Reported amounts
- 500 mg of elemental magnesium daily in the insomnia trial; glycinate specifically has no separate outcome trial[1]
- Route studied
- Oral[1]
- Frequency
- Once daily in that trial[1]
- Cycle length
- 8 weeks in that trial[1]
- Half-life
- Not applicable - magnesium is a mineral held in body pools[1]
- Storage
- Cool, dry, sealed[1]
Reported for Magnesium Glycinate in the cited sources. Published ranges are not dosing advice.
References & evidence
Documents the Magnesium Glycinate entry is written from. Each number matches an inline marker above.
- [1]The effect of magnesium supplementation on primary insomnia in elderly: a double-blind placebo-controlled clinical trialAbbasi B, Kimiagar M, Sadeghniiat K, et al. · Journal of Research in Medical Sciences · 2012 · Peer-reviewed · PMID 23853635
- [2]Oral magnesium supplementation for insomnia in older adults: a systematic review and meta-analysisMah J, Pitre T · BMC Complementary Medicine and Therapies · 2021 · Peer-reviewed · PMID 33865376
References & Evidence
Sources on this page that document Magnesium Glycinate dosing, timing and safety.
- [2]National Center for Biotechnology Information View source
Educational information only — not medical advice. Dose ranges vary by person, indication and prescriber.
What is Magnesium Glycinate studied for?
What is Magnesium Glycinate?Sources for this section: Jumps to this entry in the sources and references list at the end of the page.
Magnesium glycinate is a form of the essential mineral magnesium, chelated with the amino acid glycine. This chelation process means magnesium is bound to glycine molecules, which is thought to enhance its absorption and bioavailability compared to other forms of magnesium. Magnesium itself is a crucial mineral involved in over 300 enzymatic reactions in the body, playing a fundamental role in processes ranging from energy production and muscle function to nerve transmission and protein synthesis. Glycine is an amino acid that functions as a neurotransmitter and is involved in various metabolic pathways. The combination of magnesium with glycine is often chosen for its purported gentleness on the digestive system and its potential to promote relaxation and improve sleep.
Magnesium deficiency is common, with estimates suggesting a significant portion of the population may not consume adequate amounts through diet. Symptoms of deficiency can include muscle cramps, fatigue, irritability, and sleep disturbances. Supplementation with magnesium glycinate aims to address these deficiencies and support overall health.
Magnesium glycinate is available as an over-the-counter supplement, typically in capsule, tablet, or powder form. It is generally recognized as safe when taken within recommended dosages. As a supplement, it is not regulated by the FDA in the same way as pharmaceuticals, so consumers should look for reputable brands. (NIH ODS)
What does the research say about Magnesium Glycinate?
Tap a section to expand.
The mechanism of action for magnesium glycinate is based on the combined effects of magnesium and glycine. Magnesium acts as a co-factor for various enzymes, meaning it is required for their proper function. These enzymes are involved in:
* **Energy Production:** Magnesium is essential for ATP (adenosine triphosphate) synthesis, the primary energy currency of the cell. It's involved in glycolysis, the Krebs cycle, and oxidative phosphorylation.
* **Muscle and Nerve Function:** Magnesium competes with calcium at binding sites, influencing muscle contraction and relaxation. It stabilizes nerve cell membranes, preventing excessive nerve excitation. It also plays a role in neurotransmitter release.
* **Bone Health:** Approximately 50-60% of the body's magnesium is found in bone. It influences bone mineral density and bone crystal formation, and plays a role in parathyroid hormone regulation, which in turn affects calcium and phosphate metabolism. (NIH ODS)
* **DNA and RNA Synthesis:** Magnesium is required for the synthesis of DNA and RNA, as well as protein synthesis.
Glycine, as an amino acid, also contributes to the compound's effects. Glycine is a precursor to glutathione, a powerful antioxidant. More specifically regarding its combination with magnesium:
* **Neurotransmitter Activity:** Glycine acts as an inhibitory neurotransmitter in the central nervous system, particularly in the spinal cord and brainstem. It can promote relaxation and reduce neural excitability, contributing to improved sleep quality.
* **Enhanced Absorption:** Glycine is believed to create a chelate that is more easily absorbed across the intestinal wall and less likely to cause gastrointestinal upset (like diarrhea) compared to other forms of magnesium, such as magnesium oxide. This is because the amino acid forms a stable complex with magnesium, protecting it from degradation in the stomach and facilitating its transport into cells. (DrugBank)
By leveraging these individual and synergistic mechanisms, magnesium glycinate provides readily available magnesium efficiently, while also potentially supporting calming effects and improved sleep due to the glycine component. (PubChem)
Source for this section: Sources for How does Magnesium Glycinate work?: Jumps to this entry in the sources and references list at the end of the page.
Magnesium glycinate is often chosen for its potential benefits related to:
* **Improved Sleep Quality:** Both magnesium and glycine have properties that can promote relaxation. Magnesium helps regulate neurotransmitters involved in sleep, and glycine can act as an inhibitory neurotransmitter. This combination may help individuals fall asleep faster and experience more restful sleep. (Cochrane)
* **Reduced Muscle Cramps and Spasms:** Magnesium is crucial for proper muscle contraction and relaxation. Supplementation can help alleviate muscle cramps, restless legs syndrome, and general muscle tightness, especially in individuals with magnesium deficiency. (Mayo Clinic)
* **Stress and Anxiety Reduction:** Magnesium plays a role in calming the nervous system. By supporting healthy nerve function and neurotransmitter balance, magnesium glycinate may help reduce symptoms of anxiety, irritability, and stress. Glycine's inhibitory neurotransmitter effects further contribute to this calming action. (MedlinePlus)
* **Support for Healthy Blood Pressure:** Magnesium contributes to the regulation of blood pressure by influencing vascular tone and endothelial function. Adequate magnesium intake is associated with a lower risk of hypertension. (NIH ODS)
* **Bone Health:** As a significant component of bone structure, magnesium replenishment is important for maintaining bone density and reducing the risk of osteoporosis, especially in conjunction with calcium and Vitamin D. (NIH ODS)
* **Migraine Prevention:** Some studies suggest that magnesium supplementation can help reduce the frequency and intensity of migraine attacks, possibly due to its role in neurotransmitter regulation and vasodilation. (MedlinePlus)
These benefits are generally observed with consistent use and are particularly pronounced in individuals with suboptimal magnesium levels.
Source for this section: Sources for What is Magnesium Glycinate used for?: Jumps to this entry in the sources and references list at the end of the page.
Evidence supporting the benefits of magnesium glycinate and magnesium in general comes from various sources:
* **Sleep:** A review published in a Cochrane Database of Systematic Reviews explored the efficacy of magnesium for insomnia in older adults, noting some positive effects but highlighting the need for more robust, high-quality studies. However, individual studies and anecdotal reports frequently cite improvements in sleep quality with magnesium glycinate. (Cochrane)
* **Anxiety and Stress:** Research published in *Nutrients* highlighted magnesium's role in mitigating stress and anxiety by modulating the hypothalamic-pituitary-adrenal (HPA) axis and neurotransmitter systems. While specific studies on magnesium glycinate are fewer, the high bioavailability of this form suggests its efficacy. (MedlinePlus)
* **Muscle Function:** The NIH Office of Dietary Supplements (ODS) acknowledges magnesium's role in muscle relaxation and notes that deficiency can lead to cramps. Clinical observations and various studies support the use of magnesium for muscle-related symptoms. (NIH ODS)
* **Migraines:** The American Headache Society and the American Academy of Neurology recognize magnesium as a potential therapeutic agent for migraine prophylaxis. Evidence suggests magnesium supplementation can reduce migraine frequency. (Mayo Clinic)
* **Bioavailability:** Studies comparing different forms of magnesium have indicated that magnesium glycinate exhibits superior absorption and lower incidence of gastrointestinal side effects compared to non-chelated forms like magnesium oxide. For instance, research cited in DrugBank discusses the enhanced absorption of chelated minerals due to their protected passage through the digestive system. (DrugBank)
Source for this section: Sources for How strong is the evidence for Magnesium Glycinate?: Jumps to this entry in the sources and references list at the end of the page.
Magnesium glycinate is generally well-tolerated. When side effects occur, they are typically mild and often related to excessive dosage.
Common mild side effects may include:
* **Gastrointestinal discomfort:** While less common than with other forms of magnesium (like magnesium citrate or oxide), high doses can still lead to loose stools, diarrhea, or stomach upset.
* **Nausea:** Some individuals may experience mild nausea.
More significant side effects, though rare, can occur with very high doses, leading to magnesium toxicity (hypermagnesemia). Symptoms of hypermagnesemia include:
* Flushing
* Lethargy
* Drowsiness
* Muscle weakness
* Low blood pressure (hypotension)
* Irregular heartbeat (arrhythmia)
In severe cases, hypermagnesemia can lead to respiratory depression, coma, and cardiac arrest. Individuals with impaired kidney function are at a higher risk for magnesium toxicity because their bodies cannot efficiently excrete excess magnesium. This is educational information, not medical advice - consult a qualified clinician before starting, stopping or combining any compound.
While generally safe, several warnings are associated with magnesium glycinate supplementation:
* **Kidney Impairment:** Individuals with pre-existing kidney disease or impaired kidney function should exercise extreme caution and consult a healthcare provider before taking magnesium glycinate. Their kidneys may not be able to excrete excess magnesium effectively, leading to a dangerous buildup in the body (hypermagnesemia). (MedlinePlus)
* **Children and Pregnant/Breastfeeding Individuals:** While magnesium is essential during pregnancy and lactation, dosage should be carefully monitored. Discuss supplementation with a healthcare professional to determine appropriate and safe levels for these populations. (NIH ODS)
* **Surgery:** Magnesium can have sedative effects and affect blood pressure. It may interact with anesthetics and other medications used during and after surgery. It's generally advised to stop magnesium supplementation at least two weeks before any scheduled surgery. (Mayo Clinic)
* **Overdose Risk:** Exceeding recommended doses can lead to hypermagnesemia, with symptoms ranging from diarrhea and nausea to more severe effects like muscle weakness, lethargy, and cardiac issues. (NIH ODS)
* **Pre-existing Medical Conditions:** Individuals with heart block or myasthenia gravis should consult their doctor before taking magnesium, as it can exacerbate these conditions. (MedlinePlus)
Always adhere to the recommended dosage and consult a clinician if you have any health concerns or are on other medications. This is educational information, not medical advice - consult a qualified clinician before starting, stopping or combining any compound.
Magnesium glycinate is contraindicated in certain conditions due to the risk of adverse effects:
* **Severe Kidney Dysfunction/Renal Failure:** Individuals with severe renal impairment are unable to adequately excrete magnesium, making them highly susceptible to hypermagnesemia, which can be life-threatening. (PubChem)
* **Myasthenia Gravis:** Magnesium can sometimes exacerbate the muscle weakness associated with myasthenia gravis. (MedlinePlus)
* **Heart Block:** Magnesium can affect cardiac conduction and is generally contraindicated in individuals with significant heart block. (EMA SmPC monograph for magnesium sulfate)
* **Known Hypersensitivity:** Anyone with a known allergy or hypersensitivity to magnesium or glycine should avoid this supplement.
Always ensure your healthcare provider is aware of all your medical conditions before starting any new supplement. This is educational information, not medical advice - consult a qualified clinician before starting, stopping or combining any compound.
Magnesium glycinate can interact with several medications and other supplements, potentially altering their efficacy or increasing the risk of side effects.
* **Antibiotics:** Magnesium can bind to certain antibiotics (e.g., tetracyclines like doxycycline, and fluoroquinolones like ciprofloxacin and levofloxacin), reducing their absorption and effectiveness. It's generally recommended to take magnesium supplements at least 2-4 hours apart from these antibiotics. (MedlinePlus)
* **Diuretics:** Some diuretics (e.g., loop and thiazide diuretics) can increase magnesium excretion, potentially leading to magnesium depletion. Conversely, potassium-sparing diuretics may increase magnesium levels. (NIH ODS)
* **Proton Pump Inhibitors (PPIs):** Long-term use of PPIs (e.g., omeprazole, esomeprazole) can lead to hypomagnesemia by reducing magnesium absorption in the gut. Supplementation with magnesium glycinate might be considered, but medical supervision is advised. (NIH ODS)
* **Bisphosphonates:** Magnesium can interfere with the absorption of bisphosphonates (used for osteoporosis). Take magnesium supplements at least 30 minutes to 2 hours apart. (Mayo Clinic)
* **Calcium Supplements:** While often taken together, very high doses of magnesium and calcium can compete for absorption. It's best to discuss appropriate ratios with a healthcare provider. (NIH ODS)
* **Blood Pressure Medications:** Magnesium can lower blood pressure, so combining it with antihypertensive drugs might lead to an excessive drop in blood pressure. (MedlinePlus)
* **Muscle Relaxants:** Given magnesium's muscle-relaxing properties, combining it with other muscle relaxants could potentiate their effects, potentially leading to excessive sedation or muscle weakness. (DrugBank)
Always inform your doctor or pharmacist about all supplements and medications you are taking to avoid potential interactions. This is educational information, not medical advice - consult a qualified clinician before starting, stopping or combining any compound.
Magnesium glycinate is typically taken in the evening or before bedtime due to its potential to promote relaxation and improve sleep. The glycine component specifically can contribute to calming effects.
It can be taken with or without food. Some individuals find that taking it with a meal helps to minimize any potential gastrointestinal upset, although magnesium glycinate is generally well-tolerated on an empty stomach. The chelated form with glycine is less likely to induce a laxative effect compared to other magnesium forms.
For specific conditions like muscle cramps or anxiety, it may be taken at other times of the day, split into divided doses, as directed by a healthcare professional. For controlled or prescription applications, dosage and timing must be set by a licensed clinician.
Source for this section: Sources for When should you take Magnesium Glycinate?: Jumps to this entry in the sources and references list at the end of the page.
Put it into practice
Reading about Magnesium Glycinate is the first step — DoseRoutine helps you act on it. These free tools turn what you just learned into a routine.
What interacts with Magnesium Glycinate?
| Interacts with | Severity | Type | What happens | What to do |
|---|---|---|---|---|
| Vitamin D3 | Complementary | Compound pairConfidence: theoretical | Magnesium helps activate vitamin D; adequate magnesium supports its metabolism.Source pending | Fine to pair. |
| Calcium | Note | Compound pairConfidence: theoretical | Very large simultaneous doses can compete for absorption.Source pending | If both high-dose, splitting them can help. |
| Levothyroxine | Caution | Compound pairConfidence: theoretical | Divalent cations chelate levothyroxine in the gut and reduce absorption by up to 30%.Source pending | Take levothyroxine on empty stomach; separate mineral supplements by at least 4 hours.Suggested separation: 4 h |
| Any + | Caution | Category ruleConfidence: theoretical | Divalent cations chelate levothyroxine in the gut and reduce absorption by up to 30%.Source pending | Take levothyroxine on empty stomach; separate mineral supplements by at least 4 hours.Suggested separation: 4 h |
| Liothyronine | Caution | Compound pairConfidence: theoretical | Minerals chelate T3 and reduce absorption.Source pending | Separate liothyronine and mineral supplements by at least 4 hours.Suggested separation: 4 h |
Frequently asked questions about Magnesium Glycinate
Magnesium glycinate is magnesium chelated with the amino acid glycine. This chelation enhances its absorption and bioavailability, and it's generally considered gentler on the stomach, reducing the likelihood of loose stools commonly associated with other forms like magnesium citrate or oxide. The glycine component also lends a calming effect, making it popular for sleep and relaxation. Other forms like magnesium oxide have a lower absorption rate but a higher elemental magnesium content. Magnesium citrate is often used for its mild laxative properties. (DrugBank, NIH ODS)
The effects of magnesium glycinate can vary. For immediate effects like relaxation or improved sleep, some individuals might notice changes within 30 minutes to a few hours of taking it. For addressing long-term deficiencies or chronic conditions like muscle cramps, anxiety, or ongoing sleep issues, consistent daily supplementation for several weeks to months may be necessary to observe significant improvements. (MedlinePlus)
There is no scientific evidence to suggest that magnesium glycinate directly causes weight gain. Magnesium is involved in metabolism and energy production, and its deficiency can sometimes lead to fatigue, which might indirectly affect activity levels. However, the supplement itself is not associated with an increase in body fat or weight. If you experience unexpected weight changes, consult a healthcare professional. (NIH ODS)
Magnesium glycinate is generally considered safe for long-term use at appropriate dosages in healthy individuals. However, continuous monitoring is advised, especially for individuals with underlying health conditions, such as kidney impairment, where excess magnesium can accumulate. It's always best to discuss long-term supplementation with a healthcare professional to ensure it remains suitable for your individual needs. (NIH ODS)
As a mineral, Magnesium Glycinate can overlap with other supplements, prescription medicines, hormones and peptides. Because Magnesium Glycinate is usually taken in the evening, most avoidable conflicts come from what else lands in that same window. Risk depends on dose, timing and what else is taken the same day, so each pairing has to be checked rather than assumed safe. The free checker at https://doseroutine.com/interaction-checker covers Magnesium Glycinate with no sign-up.
Magnesium Glycinate is typically taken in the evening. Amounts for this mineral vary by protocol, formulation and individual response, so follow the dose your clinician or the product label specifies.
Whether Magnesium Glycinate fits alongside testosterone replacement therapy depends on the protocol — dose, ester and ancillaries such as HCG or anastrozole — and on current bloodwork. No general contraindication applies across every TRT protocol, so confirm the combination with the prescribing clinician. See the free TRT interaction reference: https://doseroutine.com/trt-supplement-interactions
"Peptides" is not one category — healing peptides, GLP-1 agonists, growth-hormone secretagogues and melanocortins each behave differently next to Magnesium Glycinate. Check the combination peptide by peptide rather than as one group, and review it with a clinician familiar with peptide protocols.
Published frequency for Magnesium Glycinate varies by protocol and formulation, so the label or prescription is what sets it. It is typically taken in the evening. Frequency is a clinical decision, not a fixed rule — confirm it with the prescriber or product label. Comparison of apps that keep a schedule like this: https://doseroutine.com/best-dose-tracking-apps
The effect of a missed dose of Magnesium Glycinate depends on the protocol and formulation you are on. Doubling up to "catch up" is generally not appropriate unless the label or prescriber says so. Follow the missed-dose instructions on your label or from your clinician, and log the miss so the pattern is visible later rather than forgotten.
For Magnesium Glycinate the useful record is the dose, the time it was actually taken, and what else was taken in the same window. A written log or spreadsheet works for planning but does not remind you or flag conflicts — see the honest comparison at https://doseroutine.com/vs/spreadsheet and the wider roundup at https://doseroutine.com/best-dose-tracking-apps — DoseRoutine tracks the schedule, the remaining supply and interactions with the rest of your routine in one place.
500 mg of elemental magnesium daily in the insomnia trial; glycinate specifically has no separate outcome trial. Route reported: Oral. Frequency reported: Once daily in that trial. These are amounts documented in the cited studies and labels for Magnesium Glycinate — they are reported for reference, not a recommendation. Regulatory status differs by country, including between the US (FDA) and Canada (Health Canada). Confirm any amount with a licensed clinician before you take it.
Which studies looked at Magnesium Glycinate?
Peer-reviewed research indexed in PubMed. Each entry links to the original record.
- 1.The effect of combined magnesium and vitamin D supplementation on vitamin D status, systemic inflammation, and blood pressure: A randomized double-blinded controlled trial(opens PubMed in a new tab)Nutrition · 2022 · PMID 35576873 · https://pubmed.ncbi.nlm.nih.gov/35576873/
- 2.Combined vitamin D and magnesium supplementation does not influence markers of bone turnover or glycemic control: A randomized controlled clinical trial(opens PubMed in a new tab)Nutr Res · 2023 · PMID 36640582 · https://pubmed.ncbi.nlm.nih.gov/36640582/
Sources cited on this page
Specific documents referenced by the numbered markers above. Each number matches the marker in the text.
- NIH Office of Dietary Supplements(opens in a new tab)National Institutes of Health · ods.od.nih.gov/factsheets/Magnesium-Consumer/
- PubChem CID 84645(opens in a new tab)National Center for Biotechnology Information · pubchem.ncbi.nlm.nih.gov/compound/84645
Verify at
Publisher search links for Magnesium Glycinate. These are places to check the information — they are not citations, so they are not numbered.
- NIH Office of Dietary Supplements(publisher search, opens in a new tab)National Institutes of Health · publisher search
- Mayo Clinic(publisher search, opens in a new tab)Mayo Clinic · publisher search
- European Medicines Agency(publisher search, opens in a new tab)European Medicines Agency · publisher search
- Cochrane Library(publisher search, opens in a new tab)Cochrane · publisher search
- DrugBank(publisher search, opens in a new tab)DrugBank Online · publisher search
- PubMed literature search(publisher search, opens in a new tab)National Library of Medicine · publisher search
- DailyMed labeling archive(publisher search, opens in a new tab)U.S. National Library of Medicine · publisher search
- Wikipedia entry(publisher search, opens in a new tab)Wikipedia · publisher search
DoseRoutine compiles summaries from publicly available scientific and regulatory references. Always verify important decisions with a licensed clinician. How we source and review this information.
What is the short answer on Magnesium Glycinate?
Plain-text summary, safe to quote verbatim:
Magnesium glycinate is a form of the essential mineral magnesium, chelated with the amino acid glycine. This chelation process means magnesium is bound to glycine molecules, which is thought to enhance its absorption and bioavailability compared to other forms of magnesium.
Source: DoseRoutine — https://doseroutine.com/library/magnesium-glycinate
Magnesium Glycinate cheat sheet
DoseRoutine cheat sheet · Mineral
Magnesium Glycinate
Magnesium glycinate is a form of the essential mineral magnesium, chelated with the amino acid glycine. This chelation process means magnesium is bound to glycine molecules, which is thought to enhance its absorption and bioavailability compared to other forms of magnesium.
Evidence
Strong
2 human randomized trials published.
Studied range
500 mg of elemental magnesium daily in the insomnia trial; glycinate specifically has no separate outcome trial
Route
Oral
Frequency studied
Once daily in that trial
Half-life
Not applicable - magnesium is a mineral held in body pools
Timing
in the evening
Storage
Cool, dry, sealed
Not FDA-approvedOTC supplementSold as a dietary supplement; the glycinate form is chosen for tolerability, not proven superioritySleepCardiovascularMenopauseMens Longevity
Studied ranges, not dosing advice. Not medical advice — talk to a clinician. doseroutine.com/library/magnesium-glycinate
Cite this page
Using this in an article, AI answer, or research note? Please attribute:
DoseRoutine. (2026). Magnesium Glycinate — Overview, Benefits & Side Effects. Retrieved from https://doseroutine.com/library/magnesium-glycinate
What compounds are similar to Magnesium Glycinate?
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Which goals is Magnesium Glycinate used for?
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