Research library / Glycine and GlyNAC

Subjective effects of glycine ingestion before bedtime on sleep quality

K Inagawa, T Hiraoka, T Kohda, W Yamadera, M Takahashi. Sleep and Biological Rhythms. 2006.

Published 2026-10-15Sources checked 2026-10-151 sourceEverstack research teamHow we work

In plain language

3 g of glycine before bed improved next-morning fatigue, liveliness and clear-headedness versus placebo in women with sleep complaints.

Limits

Small, short crossover; Ajinomoto-affiliated authors.

Source

doi.org/10.1111/j.1479-8425.2006.00193.x

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