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The second is a little bit more complex
Mild soreness or fatigue may occur
For anterior and lateral sites, keep the leg extended or slightly bent
Some users find they respond well to lower doses and never need to reach the peak phase amounts
For skin, it means microneedling or laser protocols where GHK-Cu shortens recovery and amplifies collagen response
In isolated rat aorta preparations, the peptide produced concentration-dependent vasodilation that was endothelium-dependent and abolished by L-NAME, and co-immunoprecipitation work traced the response to phosphorylation of Src, caveolin-1, and endothelial nitric oxide synthase, with reduced binding between caveolin-1 and eNOS [1]
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