glutathione synthetase gene Glutathione: Master Antioxidant, Reducing Oxidative Stress, and Detoxification Glutathione synthetase - Wikipedia
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Kettunen, P
Mov Disord 31:250256 Agarwal S, Gilbert R (2019) Progressive supranuclear palsy, 2018/09/26 edn

And you need blood flow for healing

doi: 10.1038/nm911

Because the real science happens when you work with quality ingredients to begin with

Yes glutathione reduces melanin production by blocking the tyrosinase enzyme