who needs glutathione Is the Master Antioxidant? Here’s What Science Says All About Glutathione: Benefits and
Description
Glutathione: Powerful antioxidant that brightens and evens skin tone

Enhancing GSH, mainly through NAC, GSH precursors rich in cysteine (whey protein, whey protein isolate rich in cysteine) or pro-GSH compound administration, becomes a potential treatment option for inflammatory diseases by reducing oxidative stress and cytokine expression especially in diabetic patients that also are at risk of more severe COVID-19 disease (299)

10.1038/srep16205 Sci
Possible Side Effects Due to a lack of research, little is known about the side effects of using glutathione supplements

"Recent developments in age-related macular degeneration: a review"

The glutathione group reported 58% lower hangover severity scores the following morning compared to placebo, with the most pronounced differences in nausea (72%) and headache intensity (64%)