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Topical GHK-Cu is widely available in skincare products and cosmeceuticals
Long-term safety data exists primarily for topical formulations, with 40+ years of use supporting favorable outcomes
A typical transitional protocol might involve four weeks at 0.25 mg daily, followed by two weeks at 0.15 mg daily, then maintenance at 0.1 mg daily for extended periods
Naunyn Schmiedeb
Full collagen remodeling takes longer, typically 12 to 16 weeks
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