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glutathione injection skin benefits Are Injections Effective for Hyperpigmentation? Glutathione Injections For Skin Whitening:
Description
Glutathione enhances the function of citrulline as part of the nitric oxide cycle

The skin melanin index was significantly lowered when 2% (w/w) GSSG lotion was applied on the face for 10 weeks compared with treatment with a placebo [88]

Ann Surg Oncol 26(3):782-790, 2019
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Apart from being produced through the exchange of cystine and glutamate, it can also be obtained via the transsulfur pathway (TSP)

Processed meat intake and incidence of Type 2 diabetes in younger and middle-aged women

This is what supports once-weekly dosing