Acetyl Hexapeptide-49

Acetyl hexapeptide-49 is a synthetic peptide—a short chain of amino acids—created in the laboratory for use in skincare formulations. Peptides are valued in cosmetics because they can interact with skin cells through multiple mechanisms whilst remaining effective at relatively low concentrations.

This ingredient functions primarily as a skin conditioning agent, helping to maintain skin texture and overall skin health. It is among a growing class of peptides now incorporated into sensitive skin products.

Peptides work by communicating with skin cells through receptor-like interactions. Acetyl hexapeptide-49 is designed to penetrate the outermost layer of skin (the stratum corneum) and engage with cellular processes that influence skin condition and appearance.

As a hexapeptide (six amino acids), it occupies a middle ground in terms of molecular size—small enough to have some penetrative capacity, yet structured enough to trigger specific cellular responses.

This ingredient is typically found in serums, moisturisers and targeted treatments formulated for sensitive skin. Use as directed by the product instructions; peptide products are generally suited to daily use. Layer with other hydrating or barrier-supporting ingredients for optimal effect.