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The dose is deliberately high compared to classical peptides (5-10 mg for GLP-1 analogues, 2-5 mg for short regeneratives) because documented GHK-Cu protocols use larger quantities in trichological and cutaneous research (1-3 mg per injection, concentrated topical applications)
Louis, MO, United States), 40 g/ml Proline (Sigma-Aldrich), 50 g/ml ascorbic acid (Sigma-Aldrich) and 10 ng/ml TGF-1 (Peprotech, Rocky Hill, NJ, United States)
Most cosmetic sources recommend rotating actives instead of layering them
Proteins such as SNAIL, Twist, and ZEB1 are known to trigger EMT and are linked to the regulation of P-glycoprotein and other ABC transporters [284,285,286]
This fully demonstrates the potent and stable effect of GHK-Cu in promoting the synthesis of skin structural proteins, laying a solid scientific foundation for its application in anti-aging skincare formulations
