Oleoyl Tetrapeptide-31

Oleoyl Tetrapeptide-31 is a synthetic peptide—a short chain of amino acids—combined with oleic acid, a naturally occurring fatty acid found in skin. This hybrid molecule is designed to mimic and support the skin's own lipid metabolism and protective functions.In formulations, it serves dual roles: as an antioxidant to help neutralise free radicals, and as a skin conditioning agent that supports the structural integrity of the skin barrier. The oleic acid component is particularly relevant, since it's a key monounsaturated fatty acid in the skin's natural lipid profile.

Oleoyl Tetrapeptide-31 appears to work through multiple mechanisms. The peptide portion may interact with cellular signalling pathways involved in skin health and stress response, whilst the oleic acid moiety integrates with the skin's lipid matrix—the layer of fats that hold skin cells together and seal in moisture.By combining these two elements, the ingredient potentially supports both immediate antioxidant defence and longer-term structural resilience. Research suggests oleic acid-based compounds can influence how skin cells organise and function, though the precise mechanisms in living…

This ingredient is typically incorporated into serums, moisturisers, and treatment products. It works well alongside other antioxidants and barrier-supporting ingredients such as ceramides, niacinamide, or vitamin E. Apply to clean skin as part of your regular routine; there is no need for special timing or sequencing, though using it consistently will yield better results than sporadic application.

Oleoyl Tetrapeptide-31 is generally well-tolerated in cosmetic formulations. As with any skincare ingredient, patch testing is sensible if you have very sensitive skin or a known sensitivity to peptides or fatty acids.