Tricaprylin

Tricaprylin is a glyceryl triester—a type of fat molecule formed from glycerin and caprylic acid, a naturally occurring fatty acid. In skincare, it functions as an occlusive and skin-conditioning agent, helping to soften and smooth the skin surface.This ingredient appears in a small proportion of skincare formulations (around 0.2%) and is often used in combination with other ingredients rather than as a standalone active. Its lipophilic nature—meaning it dissolves in oils—makes it useful in helping other water-soluble compounds penetrate the skin more effectively.

Tricaprylin works primarily as an occlusive, meaning it forms a light barrier on the skin surface that helps prevent moisture evaporation. Its oily nature allows it to dissolve in the lipid-rich outer layer of the skin (the stratum corneum).Research suggests that when incorporated into liposomal delivery systems—tiny vesicles designed to carry other ingredients—tricaprylin may enhance skin absorption of actives that are otherwise difficult to deliver topically, such as ascorbic acid (vitamin C). The mechanism appears to involve creating a more permeable pathway through the skin's barrier.

Tricaprylin is typically used as a supporting ingredient in formulations rather than a primary active, so there are no specific application instructions. Products containing it can be used as directed on the packaging. Its lightweight conditioning properties make it suitable for layering with other skincare products; allow each layer to absorb briefly before applying the next.

Tricaprylin is considered safe for topical use in cosmetics and is well-tolerated across skin types. No specific cautions or known sensitivities have been documented.