glutathione is a tripeptide as the initial acceptor. Glutathione, small Glutathione - Wikipedia

When to take Glutathione

Free radicals are unstable molecules that can damage cells, including those in our hair follicles

Animal studies show that gadolinium can cause low glutathione levels.[ref] Mercury is another heavy metal that utilizes glutathione in the detoxification pathways.[ref] Arsenic exposure causes increased glutathione usage

Systematic and controlled studies are best at providing data on adverse effects, so the true adverse effects of the supplements discussed will only be based on the limited treatments that have been studied in such a fashion

USA 97 , 51015106 (2000)

Glutathione is a powerful antioxidant and detoxifying compound