Potassium sorbate is a preservative used in cosmetics that has antimicrobial properties. It helps extend the shelf life of cosmetic products. The substance occurs naturally in berries, for example, but is usually produced synthetically for use in cosmetics. In rare cases, potassium sorbate can cause mild skin irritation.(1)
(1) Bährle-Rapp, M. (2012). Springer Encyclopedia of Cosmetics and Personal Care. 4th revised and expanded edition. Springer.
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