glutathione composition tripeptide cysteine glycine glutamic acid What Is Made Of? The Master Antioxidant Unveiled – Route2Health glutathione
Description
Arch Dis Child

Wang X, Tang T, Zhai M, Ge R, Wang L, Huang J, et al

The transsulfuration pathway is particularly active in hepatocytes but outside of the liver, it is either absent or present at very low levels [56]

Probably fragments of degraded material. Cohen is now the dean of the gerontology school at the University of Southern California, and his lab has identified many more peptides