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doi: 10.1007/s40265-021-01660-5

The scientific literature says little about KPVs safety profile, but there are concerns that it carries significant potential risks

Exp Ther Med 5: 89-94

Houten, S
I must admit that I was unsure if this would work but i am so happy with the results so far

It provides cysteine, the rate-limiting substrate for endogenous glutathione synthesis, and consistently raises intracellular GSH in clinical trials
