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Activity was tracked by absorbance at 340 nm

Explored as a possible aid for recovery and lean-mass preservation in frail or catabolic populations, though a Merck-sponsored Phase 2b trial in elderly hip-fracture patients (Adunsky et al., 2011, Archives of Gerontology and Geriatrics, PMID 21067829) was halted early over a cardiac safety signal rather than demonstrating a clear functional benefit

In lyophilized form, they are shelf-stable for many weeks

(Wiley Online Library) Yes topical glutathione, oral supplements, dermatologist-supervised topical agents, chemical peels, and laser therapies have clearer safety profiles and evidence when used appropriately