Methyl Undecylenoyl Dipeptide-16

Methyl Undecylenoyl Dipeptide-16 is a synthetic peptide—a short chain of amino acids—combined with an undecylenic acid derivative. It functions primarily as a skin conditioning agent in cosmetic formulations.This ingredient works at the surface level to help maintain skin's moisture and improve its feel and appearance. Peptides in skincare are used because they can interact with skin cells in ways that support natural maintenance functions, though the specific mechanisms vary depending on the peptide structure.

This peptide is thought to interact with the skin's outer layers, where it may help regulate moisture loss and support the skin's natural conditioning processes. The addition of the undecylenic acid chain may enhance penetration or stability within a formula.Because peptides are relatively large molecules, most activity occurs at or near the skin surface rather than deeper within the epidermis, making this ingredient particularly suited to conditioning and texture-enhancing roles.

This ingredient is typically incorporated into serums, moisturisers, and targeted treatments at low to moderate concentrations. It works well alongside hydrating and nourishing ingredients, and poses no known compatibility issues with common skincare actives. Use as directed by the product formulation.

Generally well-tolerated. Peptides have a low sensitising potential. Those with known sensitivities to amino acids or undecylenic acid derivatives should patch test first.