Acetyl Decapeptide-3

Acetyl Decapeptide-3 is a synthetic peptide — a chain of ten amino acids — designed to function as a skin conditioning agent. Peptides are small proteins that can penetrate the outer layers of skin and communicate with cells to influence their behaviour and function.

This ingredient works by signalling to skin cells, potentially supporting natural repair processes and maintaining the structural integrity of the skin. It is typically incorporated into serums, moisturisers and treatment products at concentrations that allow it to be absorbed effectively.

Acetyl Decapeptide-3 works through cellular communication. When applied topically, it penetrates the stratum corneum and interacts with skin cells, signalling them to maintain or enhance their natural functions. This can include supporting collagen maintenance and optimising barrier function.

The peptide's small molecular weight allows it to reach viable skin layers where it can influence fibroblast activity — the cells responsible for maintaining skin structure and elasticity. This signalling mechanism is gentler than active ingredients that directly alter cellular processes, making peptides suitable for most skin types.

Peptide-containing products work best when used consistently over several weeks. Apply to clean, damp skin before heavier creams to allow absorption. Peptides pair well with hydrating ingredients and antioxidants; they do not typically interact negatively with other skincare actives, though layering should follow a light-to-heavy routine. Store products in cool conditions, as peptides can degrade if exposed to prolonged heat or sunlight.