Hexapeptide-18

Hexapeptide-18 is a short chain peptide—a fragment of amino acids—designed to improve the condition and appearance of skin and hair. Peptides are increasingly used in skincare because they can interact with skin cells to support structural integrity and resilience.This ingredient functions primarily as a conditioning agent, meaning it works to soften, smooth, and improve the overall texture of the skin barrier and hair fibre. It is typically included in formulations at modest concentrations to enhance product performance.

Peptides like hexapeptide-18 are thought to work by signalling to skin cells or by forming a protective conditioning layer on the skin surface. The exact mechanism depends on the peptide's structure and the formulation in which it appears.In the context of aging skin, where the dermis naturally loses collagen and structural proteins over time, peptides may help support the skin's existing protein networks—though they do not replace lost collagen directly. Their conditioning properties help improve how skin feels and looks in the short term.

Hexapeptide-18 is most effective when used as part of a consistent skincare routine. It works well in moisturisers, serums, and conditioning treatments applied daily or as directed by the product instructions. Layer it with other hydrating or supportive ingredients for optimal results, and allow time for the product to absorb before applying additional layers.

Hexapeptide-18 is generally considered well-tolerated in skincare products. As with any new ingredient, patch test first if you have sensitive skin or a history of reactivity.