Decarboxy Carnosine Hcl

Decarboxy Carnosine HCl is a carnosine-related antioxidant/anti-glycation peptide derivative typically used at low percentages in leave-on products, and peptides of this class are generally well-tolerated with minimal stinging risk at functional concentrations. While robust human irritation datasets are limited and the HCl salt form can rarely cause mild transient sting in highly compromised barriers, it is not an exfoliating acid, surfactant, or fragrance allergen, so overall irritation potential is very low for most sensitive-skin users. Safety Notes: Decarboxy Carnosine HCl is a specialized anti-glycation/anti-oxidant peptide derivative typically used at very low levels in mass-market leave-on serums/creams (often around 0.01–0.1%) as part of multi-active complexes. In higher-performance consumer anti-aging products (leave-on), it is seen at roughly 0.5–1.0%, with a small number of high-strength OTC formulations reaching about 2% where solubility, cost, and formula stability (pH/ionic strength) become practical limiting factors. It is uncommon in rinse-off products, and when present is generally at the low end due to brief contact time.