outcome

insomnia

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