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While muscle tissue adapts quickly to increased load, connective tissue does not
References Smit, D.L., Verdegaal, T
In a separate head-to-head comparison, GHK-Cu outperformed both retinol (vitamin A) and vitamin C in improving skin firmness and elasticity, and it did so without the irritation, photosensitivity, or adjustment period associated with retinoid use
[DOI] [PMC free article] [PubMed] [Google Scholar] 31.Zhang B., Cheng Z., Chen J., et al
Advances in Therapy, 31 (12), 1247
No research program is without constraints, and acknowledging these limitations helps set appropriate expectations
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