Glycine has a tremendous number of benefits, and we can't discuss them all here.
The one incredible use of glycine that we've been interested in is how it's so great for sleep improvements. Notably, the way it makes users feel great the day after they take glycine![1,2,3]
However, it's terrible for keto dieters and possibly even diabetics. Reason being, it is highly glucogenic, and spikes blood sugar. In Mike's keto supplement experiment, he showed how BPI Sports Keto Aminos had negative impact on his state of ketosis, and one of the factors was due to the massive amounts of glycine inside:
- Inagawa, K; Subjective effects of glycine ingestion before bedtime on sleep quality; Sleep and Biological Rhythms, 4: 75–77; 2006; Retrieved from http://onlinelibrary.wiley.com/doi/10.1111/j.1479-8425.2006.00193.x/abstract
- Yamadera, W; Glycine ingestion improves subjective sleep quality in human volunteers, correlating with polysomnographic changes; Sleep and Biological Rhythms, 5: 126–131; 2007; Retrieved from http://onlinelibrary.wiley.com/doi/10.1111/j.1479-8425.2007.00262.x/abstract
- Bannai, Makoto et al. "The Effects of Glycine on Subjective Daytime Performance in Partially Sleep-Restricted Healthy Volunteers." Frontiers in Neurology 3 (2012): 61; Retrieved from http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3328957/