In food emulsions such as salad dressings, fat spreads, and butter, sorbate is often combined with benzoate for better effect. Aside from preserving the food, other benefits of this combination is reduced oxidation, free fatty acid, and thiobacbituric acid. The level of sorbate in emulsions range between 0.05-0.10%.
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Findings in a January 2019 review in the journal Acta Biomedica show that potassium sorbate can potentially trigger an allergic reaction, though these reactions are rare. The ingredient also has the potential to irritate the skin when it's used in personal care products, but these kinds of reactions are also uncommon, according to the Environmental Working Group (EWG).