glycine or glutathione The structure of glutathione,-glutamylcysteinyl glycine. The What is Glutathione? – GoldBio

Because it is given by injection, glutathione reaches the body faster than oral forms

(PubMed) Traber MG, Leonard SW, Bobe G, et al

However, under certain conditions, in the presence of free (unbound) redox metals, such as iron or copper, resulting from metal dyshomeostasis, vitamin C may exhibit prooxidant properties Prooxidant properties of vitamin C in the presence of redox-active metal ions and oxygen have been confirmed predominantly under in vitro conditions, occurrence under in vivo conditions has not been convincingly documented (Halliwell 1996)

They have to be used in a therapeutic manner with attention to the indications, effects, and side effects. As soon as the FDA eases restrictions on peptides, Hone will offer them

Ballica R, Valentijn K, Khachatryan A, Guerder S, Kapadia S, Gundberg C, et al

Zhu CW, Cosentino S, Ornstein K, et al