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People with copper allergies should avoid GHK-Cu entirely
For peptides, temperature is arguably the most significant antagonist
This one is gentle enough but effective (it's the only new product in my routine and I can already see its effects)
Topical GHK-Cu at 1 to 3% concentration is effective for localized skin and hair benefits
Based on its ability to cross the BBB, N-acetylcysteine amide (NACA) has been evaluated for its neuroprotective effect using cell lines and animal models of neurological diseases/disorders
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