BHT Preservative

Butylated hydroxytoluene (BHT) is a synthetic antioxidant. It is made from petroleum-based chemicals through a process called alkylation. BHT is a yellowish crystalline solid.

Manufacturers add BHT to foods to prevent fats and oils from going rancid, which helps extend shelf life. It is commonly found in cereals, baked goods, snack foods, and processed meats.

In the U.S., BHT is generally recognized as safe (GRAS) by the FDA for use as a food preservative. Studies have looked into its potential health effects, with some animal studies suggesting possible links to certain health issues at very high doses, while others show no adverse effects. Regulatory bodies like JECFA and EFSA have evaluated BHT, and it is permitted for use in many countries. Evidence on its long-term effects in humans at typical dietary levels is mixed and continues to be studied.