outcome

sleep quality

Meta-analysisModerate evidence

Magnesium for Sleep: Does It Work? What the Research Says

Magnesium is a popular sleep supplement, but the clearest human evidence is still concentrated in older adults with insomnia rather than everyone with a rough night of sleep.

Oct 5, 2026

ReviewPreliminary evidence

Glycine for Sleep: Does It Work? Dosage & Evidence

Glycine has a small but interesting human sleep literature, with the clearest signal around bedtime use to improve perceived sleep quality and next-day functioning.

Sep 19, 2026

ReviewPreliminary evidence

Can a Calming Supplement Really Help You Sleep?

A new sleep-nutrition review places L-theanine in the serious sleep-support conversation — but the strongest read is relaxation and wind-down support, not a guaranteed insomnia fix.

May 29, 2026