glutathione same as glutamine Movement of glutamate, glutamine, cystine, and xanthine by The pleomorphic functions of glutamine

Mishra B, Kumbhare LB, Jain VK, Priyadarsini KI (2008) Pulse radiolysis studies on reactions of hydroxyl radicals with selenocystine derivatives

Ullah S, Kolo Z, Egbichi I, Keyster M, Ludidi N (2016) Nitric oxide influences glycine betaine content and ascorbate peroxidase activity in maize

S-acetyl Glutathione: A stable form taken as tablets or capsules, though less effective than IV

I am no expert on any of this but read this forum every day

Piazza explains further why he recommends using these three supplements to all his surgical patients: Post-Surgery Supplement Protocol When to Resume Taking Supplements After Surgery While its important to follow your surgeons instructions on the day of your procedure, it's perfectly fine to pause these supplements for the day of surgery