glutathione is a thiole Thiols Molecular structures of LMW thiols:
Description
Foyer et al., 1991, 1995

When ingested, a large amount of the amino acids is lost during digestion and therefore cant be absorbed by the body

While the body can make enough glutamic acid to meet our needs in most situations, major trauma, sepsis, chemotherapy and radiotherapy can all deplete glutamic acid, meaning that supplementation is required

, Professor Akiko Iwasaki has a different theory
