Experts Say 1-3 mg Melatonin Beats 250 mg Magnesium for Most Sleep Timing Problems
Updated
Updated · The Washington Post · Aug 2
Experts Say 1-3 mg Melatonin Beats 250 mg Magnesium for Most Sleep Timing Problems
3 articles · Updated · The Washington Post · Aug 2
Summary
A 2024 review of 26 randomized trials found melatonin shortened time to fall asleep and increased total sleep, with the strongest results at 4 mg taken about three hours before bedtime.
Experts said melatonin is best for circadian-timing problems—jet lag, shift work, or natural night-owl patterns—while magnesium may offer only modest help for mild, short-term sleep issues or muscle tension.
Low-dose melatonin of 1-3 mg for a few weeks is generally considered safe for healthy adults, though most people should not exceed 5 mg and children should use it only under pediatric supervision.
Magnesium has thinner evidence: one small 2025 trial found 250 mg magnesium bisglycinate improved sleep over a month, but specialists still prefer getting magnesium from foods such as leafy greens, nuts and legumes.
Neither supplement is a sedative or a treatment for chronic insomnia, and both can interact with medications; doctors advise checking with a clinician and choosing third-party-tested products.