🔬 Education • Evidence-Based Supplement Review
Published: October 1, 2026 • Reviewed: Oct 2026 • Reading time: 6 min
Magnesium Glycinate
What Science Says
A neutral, evidence-based review of magnesium glycinate: what it is, how it works, current human clinical research, and practical administration guidance.
🛡️ Educational review · No medical claims
🔬 Based on peer-reviewed research
✓ Third-party tested · Non-GMO · Vegan
This article is for educational purposes only and does not constitute medical advice. Consult your healthcare provider for personal guidance.
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Ingredients
Active Ingredient
Magnesium Glycinate
(as magnesium bisglycinate chelate)
• 200 mg magnesium glycinate per capsule (= 40 mg elemental magnesium)
Other Ingredients
- • Hypromellose (vegetable capsule)
- • Microcrystalline cellulose (filler)
- • No artificial colors, flavors, or preservatives
- • Gluten-free • Vegan
ⓘ Magnesium glycinate is elemental magnesium bound to the amino acid glycine, designed for higher bioavailability and gentler digestion compared to oxide or carbonate forms.
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Research
Magnesium is an essential mineral involved in over 300 enzymatic reactions in the human body, including nerve function, muscle relaxation, and ATP energy production. Magnesium glycinate is specifically studied for its high absorption and gastrointestinal tolerability.
🛏️ Sleep & Relaxation
Small randomized studies suggest supplementation supports sleep quality by regulating GABA receptor activity.
💪 Muscle Function
Supports muscle contraction-relaxation cycles and reduces nocturnal cramping incidence in athlete trials.
🧠 Stress & Mood
Preliminary human research indicates a role in stress-induced autonomic response and HPA-axis modulation.
Note: Research results vary. Most studies involve daily supplementation over 4–12 weeks. Individual responses depend on baseline magnesium status, diet, and overall health.
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How to Use
Suggested Use
• Take with food to improve tolerability
• Consistent daily use is typical in clinical trials
• Best taken in the evening if using for sleep support, or with a meal for general support
• Consistent daily use is typical in clinical trials
• Best taken in the evening if using for sleep support, or with a meal for general support
Storage & Verification
• Store in a cool, dry place away from direct sunlight
• Keep out of reach of children
• Look for products tested for purity by accredited third-party labs (USP/NSF)
• Keep out of reach of children
• Look for products tested for purity by accredited third-party labs (USP/NSF)
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Dosage
General Guidance from Research:
• Typical studied amounts range from 200–400 mg magnesium glycinate per day (= 40–80 mg elemental magnesium).
• Start with a lower dose (e.g., 1 capsule) to assess individual tolerance, then titrate if needed.
• Upper intake limits established by health authorities (NIH/EFSA) for supplemental magnesium should be considered (typically 350 mg elemental/day for adults).
Individual needs vary. Persons with renal conditions or on pharmaceutical medications should consult a clinician.
• Start with a lower dose (e.g., 1 capsule) to assess individual tolerance, then titrate if needed.
• Upper intake limits established by health authorities (NIH/EFSA) for supplemental magnesium should be considered (typically 350 mg elemental/day for adults).
Individual needs vary. Persons with renal conditions or on pharmaceutical medications should consult a clinician.
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Comparison: Common Magnesium Forms
| Form | Typical Use | Absorption / Bioavailability | Digestive Tolerance | Notes |
|---|---|---|---|---|
| Magnesium Glycinate | General supplementation, sleep, anxiety support | High | High — less likely to cause diarrhea | Bound to glycine; gentle on stomach lining |
| Magnesium Citrate | Bowel regularity, occasional constipation | Moderate–High | Moderate — can exert laxative effect | Often used for rapid digestion support |
| Magnesium Oxide | Antacid, short-term laxative use | Low | Low — more likely to cause loose stools | Inexpensive; high elemental weight but poor intestinal transit |
| Magnesium Chloride | General supplementation, topical sprays | Moderate | Moderate | Common in topical or liquid mineral formulations |
*Absorption and tolerance can vary by person. Table is for comparative educational guidance.
- Schuette SA, et al. Bioavailability of magnesium diglycinate vs magnesium oxide in human intestinal resection models. JPEN J Parenter Enteral Nutr. 1994;18(5):430-435.
- Abbasi B, et al. The effect of magnesium supplementation on primary insomnia in elderly: A double-blind placebo-controlled clinical trial. J Res Med Sci. 2012;17(12):1161-1169.
- Boyle NB, et al. The Effects of Magnesium Supplementation on Subjective Anxiety and Stress—A Systematic Review. Nutrients. 2017;9(5):429.
- National Institutes of Health (NIH) Office of Dietary Supplements. Magnesium Fact Sheet for Health Professionals. Updated 2026.