ghk cu safe GHK-CU – Research Peptide GHK-Cu (Copper Peptide) Deep Dive:

At 8 mg and 12 mg, the results were dramatic, with the highest dose producing an average 24.2% body weight reduction over 48 weeks

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The primary molecular actions relevant to skin are: modulation of TGF- signaling (upregulating TGF-1 for collagen I/III synthesis while suppressing TGF-2 to prevent scarring), decorin upregulation for orderly collagen fibril assembly, MMP suppression paired with TIMP upregulation to preserve ECM integrity, and copper-dependent lysyl oxidase activation for collagen crosslinking

References: Goulian, A