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This small molecule peptide functions as a selective nicotinamide N-methyltransferase (NNMT) inhibitor, targeting cellular metabolism at its source

The products are popular with a group of unlikely allies, including the "looksmaxxing" and fitness communities, longevity experts, dermatologists and medical spas, and companies that operate compounding pharmacies like Noom and Hims & Hers Health, both of which made a name selling GLP-1 medications, which are also peptides

Safety, Sensitivity and When to See a Professional GHK-Cu is generally considered well tolerated in cosmetic formulations

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