glutathione skin whitening research PDF) for lightening: a regnant myth or evidence-based verity? Glutathione : Pigment International

Although glutathione is produced by the liver naturally, you can also take glutathione-based supplements to increase its levels in the body

When there is a deficiency in glutathione reductase, red blood cells become vulnerable to oxidative stress, leading to their premature breakdowna process known as hemolysis

159 This patients erythrocyte GSH-Px activity was 17% of control activity, while her hematologically normal parents had 51% to 66% control enzyme activity

A., & Fonseca Goulart, M

It's an ambiguity acknowledged by the review's authors, who state that more research is needed to clarify optimal amounts and to identify "sub-groups of individuals most likely to respond to particular nutrients or foods." Speaking with a doctor is your best first-line action to determine whether you could benefit from swapping dietary glutathione for a supplement, or vice versa