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correlational
positive effect
Taking 3 grams of glycine before bed might help people fall asleep faster and reach deep sleep quicker, based on sleep monitoring equipment.
Scientific Claim
Ingestion of 3 grams of glycine before bedtime is associated with reduced sleep onset latency and slow wave sleep latency in polysomnographic measurements among individuals with chronic sleep dissatisfaction.
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.”