Not medical advice. I am a software engineer, not a physician. This page documents my own protocol and the research I read while building it. Talk to a qualified clinician before changing your supplementation, diet or any treatment. Lab reference ranges quoted here vary by laboratory and by individual.
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Magnesium glycinate is a chelated form of magnesium bound to glycine, an inhibitory amino acid. This combination offers two distinct advantages: the glycinate chelation provides exceptionally high bioavailability with minimal gastrointestinal side effects (unlike magnesium oxide or citrate, which can cause diarrhea), and the glycine itself has independent calming properties via GABA and glycine receptor modulation. Magnesium participates in over 300 enzymatic reactions including ATP production, DNA synthesis, protein folding, and neuromuscular function.
Why glycinate over other forms? Magnesium oxide has only ~4% bioavailability. Citrate is better (~30%) but causes osmotic diarrhea at higher doses. Glycinate achieves ~80% absorption with virtually no GI distress, and the glycine moiety adds calming and sleep-promoting effects — a dual benefit from a single supplement.
| Parameter | Detail |
|---|---|
| Product | Bluebonnet Nutrition Magnesium Glycinate 400 mg (120 Vegetable Capsules) |
| Afternoon dose | 2 capsules at 4:00 PM (200 mg elemental Mg) |
| Evening dose | 2 capsules at 8:15 PM (200 mg elemental Mg) |
| Total daily | 400 mg elemental magnesium from glycinate |
| Rationale | Split dosing maximizes absorption and provides progressive muscle relaxation and GABA modulation leading into sleep. Afternoon dose reduces late-day tension; evening dose supports sleep onset. |
Abbasi, B., et al. (2012). The effect of magnesium supplementation on primary insomnia in elderly: a double-blind placebo-controlled clinical trial. J Res Med Sci, 17(12), 1161-1169. PubMed 28395631
Schuchardt, J. P., & Hahn, A. (2017). Intestinal absorption and factors influencing bioavailability of magnesium: an update. Curr Nutr Food Sci, 13(4), 260-278. PubMed 29093983
Garrison, S. R., et al. (2012). Magnesium for skeletal muscle cramps. Cochrane Database Syst Rev, 9, CD009402. PubMed 26808142
A November 2025 precision-based randomized placebo-controlled trial (PPCCT) published in The American Journal of Clinical Nutrition found that magnesium glycinate supplementation increased the abundance of gut bacteria (Carnobacterium maltaromaticum and Faecalibacterium prausnitzii) that synthesize vitamin D locally, with this locally produced vitamin D helping to inhibit the development of colorectal cancer cells. A December 2025 RCT in 153 participants with sleep problems found that magnesium bisglycinate improved insomnia symptoms compared to placebo. A 2026 animal study investigating chronic organic magnesium supplementation found that magnesium glycinate exhibited anxiolytic properties, reducing anxiety-like behaviors — though further clinical studies are warranted to validate these effects in humans. PMID: 40946805
| Test | Why It Matters | Details |
|---|---|---|
| Magnesium RBC (Erythrocyte) | Standard serum magnesium only reflects 1% of body stores and remains normal even in significant deficiency. RBC magnesium is the gold standard for intracellular Mg status. Optimal: 5.2-6.5 mg/dL. | Lab Tests |
Bluebonnet Nutrition Magnesium Glycinate 400 mg (120 Vegetable Capsules) — $25.34
Pure magnesium bisglycinate chelate providing 100 mg elemental Mg per capsule. Soy-free, non-GMO, vegan. Gentle on the stomach.
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