Back to Ingredient Dictionary

UNDECANOIC ACID

Description

Undecanoic acid, also known as hendecanoic acid, is a medium-chain fatty acid with the chemical formula C11H22O2. This saturated carboxylic acid is naturally found in small quantities in coconut oil and castor oil. In skincare formulations, undecanoic acid serves multiple purposes, primarily as an antimicrobial and antifungal agent.

The compound exhibits potent activity against various fungal species, including those responsible for common skin infections like athlete's foot and ringworm. Its mechanism of action involves disrupting the cell membranes of microorganisms, leading to their destruction. Undecanoic acid also demonstrates effectiveness against certain bacteria, contributing to its role in maintaining skin hygiene.

In addition to its antimicrobial properties, undecanoic acid functions as an emollient, helping to soften and smooth the skin. It can also act as a penetration enhancer, potentially improving the efficacy of other active ingredients in a formulation. Due to its fatty acid nature, it may assist in supporting the skin's natural barrier function.

Undecanoic acid is generally well-tolerated in topical applications, making it suitable for incorporation into various skincare products, including antifungal creams, lotions, and cleansers. Its versatility and efficacy make it a valuable ingredient in addressing multiple skin concerns simultaneously.