Pentapeptide-20

Pentapeptide-20 is a short chain peptide—a fragment of amino acids—designed primarily for hair care applications. Peptides are naturally occurring compounds found throughout the body, and those used in cosmetics are typically synthesised to target specific functions in hair and skin conditioning.In haircare formulations, pentapeptide-20 functions as a conditioning agent, working to improve the texture and manageability of hair fibres. It is used at relatively low concentrations within formulated products.

Peptides work by interacting with the protein structure of hair. Pentapeptide-20 is thought to adhere to the hair cuticle—the outer protective layer—where it deposits a conditioning film. This film can help seal the cuticle layer, reduce moisture loss, and improve the overall smoothness and appearance of the hair fibre.The mechanism relies on the peptide's affinity for keratin, the primary structural protein in hair, allowing it to support the integrity of the hair shaft itself.

Pentapeptide-20 is typically encountered in rinse-off products such as conditioners and hair masks rather than leave-on treatments, given its primary conditioning function. Apply to damp hair, leave for the time specified on the product, then rinse thoroughly. For best results, use consistently as part of your regular haircare routine.

Pentapeptide-20 is generally considered well-tolerated in cosmetic formulations. As with all haircare products, discontinue use if irritation develops and perform a patch test if you have known sensitivities to peptides or other ingredients.