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  • How to Make a Peptide Serum: DIY Peptide Formulation Guide

    How to Make a Peptide Serum: DIY Peptide Formulation Guide

    A formulator's guide to adding cosmetic peptides to a homemade serum, with sourced usage rates, pH windows and process temperatures for ten peptides, pairing rules for copper peptide, preservation, and a worked 1 oz formula.