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Because of its broad regenerative research profile, GHK-Cu is frequently investigated in skin-integrity, connective-tissue, and recovery-focused experimental models
Studies report improved collagen organization, enhanced fibroblast activity, and increased biomechanical strength, suggesting interaction with natural repair pathways in experimental systems
Epitalon-only protocols fall in this range
one study had several flaws (unmatched controls, unclear cancer stage classification), while the best-designed one had negative results [68, 69, 64, 66, 67]
pairing it with activity, protein, and resistance training tends to compound
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