nano glutathione uses Drops – Antioxidant & Detox Support Glutathione: Benefits and Supplements
Description
[PubMed] Eliasof S, Jahr CE
But for I think for the most part in this where we are now in the current state of investigation, we dont have a lot of answers

Reduces hyperpigmentation: Hyperpigmentation, such as dark spots, age spots, or melasma, can be effectively treated with skin whitening tablets

This enzyme is required to maintain a cellular redox state by sustaining a balance between reduced Glutathione and AsA pool by regenerating the reduced form of GSH [194]