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Undark, 2026) The gold standard of medical evidence large, multicenter, double-blind RCTs does not exist for BPC-157

That does not make every glutathione claim legitimate

The pharmacokinetic answer: GHK-Cu has a plasma half-life of approximately 30-60 minutes in circulation, meaning it clears your bloodstream within hours of injection or topical application

A full blood count and serum B12 measurement are straightforward investigations that can help differentiate causes

The ability to recover from muscle injuries also diminishes with age
