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correlational
positive effect

Taking 3 grams of glycine before bed might help people fall asleep faster

Scientific Claim

Glycine ingestion (3 g) before bedtime is associated with reduced sleep onset latency in individuals with chronic unsatisfactory sleep, as measured by polysomnography

Source Excerpt

Glycine improved subjective sleep quality and sleep efficacy (sleep time/in-bed time), and shortened PSG latency both to sleep onset and to slow wave sleep without changes in the sleep architecture.