glutathione gssg Oncology Letters Biosynthesis of GSH and GSH/GSSG

Yes, water retention can kill you

PMID 29318504

Using OPA allows glutathione to be measured along with amino acids (Noctor and Foyer, 1998), though one drawback compared to bimane derivatization is that cysteine is not readily detectable

Placebo -Skin and Antioxidant Outcomes A published double-blind RCT showed that oral glutathione supplementation at 500mg/day produced measurable improvements in skin luminosity, reduced melanin index, and increased plasma antioxidant capacity versus placebo at 12 weeks

You should be able to return to most normal activities straight away

Recovery time: Noting how quickly soreness resolves after activity