SEIKATSU EISEI (Journal of Urban Living and Health Association)
Online ISSN : 1883-6631
Print ISSN : 0582-4176
Reports
Assessment of Acute Adverse Events of Glycine Ingestion at a High Dose in Human Volunteers
Kentaro INAGAWANobuhiro KAWAIKaori ONOEiji SUKEGAWAShoji TSUBUKUMichio TAKAHASHI
Author information
JOURNALS FREE ACCESS

2006 Volume 50 Issue 1 Pages 27-32

Details
Abstract

We found in our previous study that glycine ingestion (3 g) before bedtime significantly produced subjective sleep effects in volunteers who had been continuously experiencing unsatisfactory sleep. Further, a series of published reports has shown that the safety of glycine is relatively high. The present study was conducted to assess acute adverse events or a daytime sleepiness effect after using a 3-fold higher dose (9 g) than the previous study. The results indicated that 9 g doses of glycine produced changes in several clinical test parameters, which were however within the range of physiological normal variation, and changes in blood level of some amino acids, which also were considered to be within or very close to the range of physiological normal variation. Digestive symptoms occurring only after the bedtime ingestion were observed; though these possibly were adverse events, they were not serious. Further, glycine did not produce daytime sleepiness. It could be concluded that 9 g of glycine produced neither acute serious adverse events nor a daytime sleepiness carry-over effect.

Information related to the author
© 2006 by Osaka Urban Living and Health Association
Previous article Next article
feedback
Top