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correlational
mixed effect
Taking 3 grams of glycine before bed doesn't change sleep stages like sleeping pills do
Scientific Claim
Glycine ingestion (3 g) before bedtime is associated with no significant changes in sleep architecture in individuals with poor sleep, unlike traditional hypnotic drugs such as benzodiazepines which typically alter sleep architecture
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. Thus, a bolus ingestion of glycine before bedtime seems to produce subjective and objective improvement of the sleep quality in a different way than traditional hypnotic drugs such as benzodiazepines.”