Or TBHQ

TBHQ, or tert-Butylhydroquinone, is a synthetic antioxidant. It is manufactured from hydroquinone, a chemical derived from petroleum. TBHQ is a white or slightly colored crystalline powder.

TBHQ is added to foods to prevent fats and oils from spoiling, which extends shelf life. It works by inhibiting oxidation, a process that can cause rancidity and off-flavors. It is commonly found in processed foods containing fats and oils, such as fried snacks, baked goods, and processed meats.

TBHQ is permitted for use as a food additive by the FDA. It is generally recognized as safe (GRAS) in small amounts. Studies in animals have looked at high doses, but the FDA has determined that TBHQ is safe for consumption at the levels typically found in food. JECFA and EFSA have also evaluated TBHQ and established acceptable daily intakes. Some research has explored potential health effects, but the evidence at typical consumption levels is not considered a concern by regulatory bodies.