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Why has GHK-Cu not been approved by the FDA

Wei JL, Wu SY, Yang YS, Xiao Y, Jin X, Xu XE, et al

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ProHealth extends this architecture by adding both a postbiotic (directly delivered butyrate via ButyroGen) and a peptide (BPC-157) that pre-clinical animal research suggests may support the gastrointestinal environment - a mechanism the brand describes based on its own published references, not as an established human clinical outcome