Magnesium vs Glycine

for sleep

Stronger evidence: Magnesium

Stronger effect: Magnesium

Safety: Magnesium carries a minor interaction; Glycine has none recorded.

For sleep, Magnesium has the stronger evidence grade.

grade B moderate certainty

modest improvement in sleep

200–400 mg, glycinate, adults

grade C low certainty

small trials suggest improved subjective sleep quality and reduced next-day fatigue

3 g before bed, adults

sources: PMID:00000001 · PMID:10000002