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correlational
positive effect
Taking glycine before bed might help people spend more time actually sleeping compared to time in bed, according to sleep monitoring equipment.
Scientific Claim
Glycine ingestion (3 g) before bedtime was associated with improved sleep efficacy (sleep time/in-bed time) 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.”