Tbho

TBHQ, or tertiary butylhydroquinone, is a synthetic antioxidant. It is made from hydroquinone and isobutylene. TBHQ is a white or slightly colored crystalline powder.

TBHQ is added to foods to prevent oils and fats from going rancid, which helps extend shelf life. It is commonly found in foods with high fat content, such as vegetable oils, shortening, and processed snacks like chips and crackers.

In the US, TBHQ is approved as a food additive and is generally recognized as safe (GRAS) by the FDA when used within specified limits. Regulatory bodies like JECFA and EFSA have evaluated TBHQ. Some studies in animals have raised concerns about potential health effects at very high doses, but evidence at typical human consumption levels is mixed. The FDA continues to permit its use in foods.