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descriptive
neutral effect
Taking 3 grams of glycine before bed might help people with sleep problems feel like they slept better, but we don't know if this works long-term or for everyone
Scientific Claim
Glycine ingestion (3 g) before bedtime is associated with improved sleep quality in individuals with poor sleep, but the study did not measure long-term effects or effects in the general population
Source Excerpt
“In human volunteers who have been continuously experiencing unsatisfactory sleep, effects of glycine ingestion (3 g) before bedtime on subjective sleep quality were investigated, and changes in polysomnography (PSG) during sleep were analyzed. Effects on daytime sleepiness and daytime cognitive function were also evaluated.”