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PMID 22365244

Skin-whitening and skin-condition-improving effects of topical oxidized glutathione: A double-blind and placebo-controlled clinical trial in healthy women

However, clinical research and wellness practitioners generally suggest the following ranges for oral supplementation

One study found some possible interactions among males who took glutathione as a skin treatment via an IV drip, including liver issues or infertility, which is why the FDA warned the public of the dangers of an injectable skin lightening agent

Glutathione is often referred to as the "master antioxidant" due to its ability to regenerate other antioxidants in the body