Potassium Sorbate And TBHQ

Potassium sorbate is the potassium salt of sorbic acid, a naturally occurring organic compound. It is manufactured industrially by neutralizing sorbic acid with potassium hydroxide. TBHQ (tertiary butylhydroquinone) is a synthetic antioxidant chemically related to BHA and BHT.

Potassium sorbate is used as a preservative to inhibit the growth of mold, yeast, and fungi in foods like cheeses, baked goods, and dried fruits. TBHQ is an antioxidant used to prevent oils and fats from becoming rancid in processed foods such as snack foods, fried foods, and baked goods.

Both potassium sorbate and TBHQ are approved food additives in the US. FDA considers potassium sorbate to be Generally Recognized As Safe (GRAS). TBHQ is also approved by the FDA for use as an antioxidant. JECFA and EFSA have evaluated both substances and established acceptable daily intakes. Some studies have raised questions about potential health effects of TBHQ at very high doses, but regulatory bodies consider it safe at permitted levels.