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Body Protection Compound-157 (BPC-157) earned the "healing peptide" label through its broad, multi-system reparative activity observed across preclinical models, covering muscle, tendon, ligament, bone, and gastrointestinal tissue repair

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In aged Wistar rats with documented age-related melatonin decline: Epitalon treatment restores AANAT mRNA and enzyme activity toward young-animal levels Nocturnal melatonin amplitude is increased (RIA/ELISA measurement in plasma and pineal tissue) Circadian locomotor rhythm amplitude is partially restored in aged rodent models (wheel running actograms) Core clock gene expression (BMAL1, CLOCK, PER1/2, CRY1/2) shows partial restoration in Epitalon-treated aged tissues GHK-Cu has no documented pineal or circadian mechanism