Research library / Sleep

Glycine ingestion improves subjective sleep quality in human volunteers, correlating with polysomnographic changes

W YAMADERA, K INAGAWA, S CHIBA, M BANNAI, M TAKAHASHI, K NAKAYAMA. Sleep and Biological Rhythms. 2007.

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

In plain language

3 g of glycine before bed improved subjective sleep quality, with supporting changes on sleep recordings.

Limits

Very small, short study.

Source

doi.org/10.1111/j.1479-8425.2007.00262.x

Summary written by Everstack from the published abstract. Verified against Crossref on 2026-10-15. The authors do not endorse Everstack.