Sr-Dog Polypeptide-3

Sr-Dog Polypeptide-3 is a peptide—a short chain of amino acids—designed to work in skincare formulations. Peptides are naturally occurring compounds found in the skin, and synthetic versions are included in cosmetics to support skin function and appearance.This ingredient is classified as an antioxidant and skin protectant, meaning it may help defend against environmental stressors and support the skin's natural defences. It also has hair-conditioning properties, making it useful in both skincare and haircare products.

As a peptide, Sr-Dog Polypeptide-3 works by signalling to skin cells and providing antioxidant activity. Antioxidants function by neutralising free radicals—unstable molecules generated by UV exposure, pollution, and other environmental factors that can damage skin cells.The peptide structure also allows it to condition and soften the skin surface, improving the feel and appearance of the skin when incorporated into creams, serums, or other products.

This ingredient is typically found in serums, creams, and conditioning treatments. It works well alongside other antioxidants and peptides in a routine. No special application method is required; use according to the product instructions. There is no evidence that higher concentrations deliver proportionally better results, so follow the manufacturer's guidance.

Sr-Dog Polypeptide-3 is generally well-tolerated in cosmetic formulations. Peptides are low risk for sensitivity, though individual reactions are always possible.