Palm Kernel Acid

Palm Kernel Acid is a mixture of fatty acids (notably lauric/myristic) used mainly to form soaps/surfactants or as an emollient-derived component; in leave-on products at low levels it’s usually tolerated, but in cleansing systems or when converted to salts it can contribute to barrier lipid stripping. Clinically, fatty-acid–rich surfactant systems are a common source of irritant contact dermatitis in eczema-prone and compromised skin, so I score it as mild due to realistic risk in reactive individuals and cumulative irritation in routines. Safety Notes: Palm Kernel Acid (a fatty acid mixture from palm kernel oil, typically lauric/myristic-rich) is most often encountered in rinse-off cleansing formats as part of the total fatty-acid/surfactant system; at the low end (~0.1–1%) it appears as a minor co-surfactant/structurant or as a trace component of blends. In high-oleo/soap-type bars, syndet bars, and fatty-acid thickened liquid cleansers marketed to consumers, it can be a major structuring fatty-acid input, with palm-kernel-derived fatty acids commonly reaching ~15–35% of the formula (especially in solid cleansers), while use at these levels is uncommon in leave-on products due to waxy feel and comedogenicity/irritancy potential.