TBHQ - Tertiary Butylhydroquinone

Tertiary butylhydroquinone (TBHQ) is a synthetic antioxidant. It is made from hydroquinone and isobutylene.

TBHQ is added to foods to prevent oxidation and extend shelf life. It is often found in high-fat foods like vegetable oils, animal fats, baked goods, and snack foods, such as popcorn and peanuts, to prevent them from becoming rancid.

TBHQ is permitted as a food additive by the FDA. It is generally recognized as safe (GRAS) when used within specified limits. JECFA has evaluated TBHQ and established an acceptable daily intake. Some studies in animals have shown potential health effects at very high doses, but these are not considered relevant at typical human consumption levels. Evidence regarding long-term effects in humans is limited.