Magnesium for Melatonin Production
Magnesium supports the enzymatic conversion of serotonin to melatonin and has RCT evidence for improving sleep quality in deficient and older adults.
Overview
How It Works
Dosing & Protocol
Typical dose
- Recommended dose
- Glycinate or citrate, 200–400 mg, 1–2 hours before bed.
- Expected timeframe
- 4-8 weeks
Protocol
- form
- Magnesium glycinate or citrate
- duration
- 8 weeks, the length of the main trial
- co factor
- Take with food, 1-2 hours before bed. The mechanism has a real biochemical basis: magnesium is a cofactor for enzymes in the pathway converting serotonin to melatonin, including N-acetyltransferase, and magnesium deficiency in animal studies reduces pineal melatonin output. In humans, the 8-week randomised trial in elderly people with insomnia that used 500 mg/day magnesium oxide reported increased serum melatonin alongside improved sleep time, efficiency and onset latency, and reduced serum cortisol - which is the most direct human evidence available. It is one trial in a specific population, melatonin was a secondary outcome, and the effect is unlikely to match taking melatonin directly. Treat this as supporting endogenous synthesis rather than replacing exogenous melatonin.
- titration
- Up to 400 mg/day in divided doses; the elderly insomnia trial used 500 mg/day of magnesium oxide
- starting dose
- 200 mg elemental magnesium in the evening
Evidence
What the studies say
The effect of magnesium supplementation on primary insomnia in elderly: a double-blind placebo-controlled clinical trial
Abbasi B, Kimiagar M, Sadeghniiat K +3 more
Higher magnesium intake was associated with better sleep quality and reduced insomnia symptoms.
Magnesium supplementation and sleep quality in older adults: a double-blind placebo-controlled trial
Abbasi B, Kimiagar M, Sadeghniiat K +3 more
Magnesium increased serum melatonin and improved sleep efficiency versus placebo
Safety
Caveats
Loose stools at higher doses; cheap oxide forms absorb poorly.
Less likely to help if
Medical Disclaimer
The information provided on this website is for educational and informational purposes only and is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition or before starting any supplement regimen.
Individual results may vary. The statements on this website have not been evaluated by the Food and Drug Administration. Products and information are not intended to diagnose, treat, cure, or prevent any disease.