Potassium Sorbate Bon Conservateur No known benefits Potassium Sorbate at a glance Used as a preservative in cosmetics Also used in food to prohibit the growth of yeast and mold Found to be safe in amounts of up to 10% Generally used in cosmetics in amount of 1% or lower Potassium Sorbate description Potassium sorbate is the potassium salt of sorbic acid that is used as a preservative in cosmetics. While it can be naturally derived, most potassium sorbate is produced synthetically. It is almost always used in conjunction with other preservatives due to its weaker activity. Potassium sorbate’s effectiveness as a preservative is pH-dependent and should be used when the pH is below 5. It is commonly used in combination with sodium benzoate to offer more broad spectrum antimicrobial activity. The independent Cosmetic Ingredient Review panel found that potassium sorbate is safe in amounts up to 10%; it is most used in skin care products in amounts of 1% or lower. Potassium sorbate is also used as a food preservative, where it helps prohibit the development of yeast and mold in wine, cheeses, yogurt, and dried meats. Related ingredients: Sorbic Acid