Additive guide
Is BHT bad? What the science actually says
By the HealthierCart team ·
What is BHT?
BHT (butylated hydroxytoluene) is a synthetic antioxidant preservative used alongside or instead of BHA to stop fats and oils from oxidizing, keeping cereals, snacks, and packaged foods fresh longer.
| Also known as | Butylated hydroxytoluene, E321 |
|---|---|
| E-number | E321 |
| U.S. status | Approved / permitted by the U.S. FDA |
| EU status | Permitted in the EU |
| HealthierCart view | Limit intake |
| Commonly found in | Breakfast cereals, chips and crackers, chewing gum, packaged baked goods, and fats and oils — often listed together with BHA. |
So, is BHT bad for you?
Generally considered lower concern than BHA. Animal studies are genuinely mixed — some show tumor-promoting effects, others protective — and EFSA's 2012 review set an acceptable daily intake without classifying it as genotoxic. It is worth limiting as an ultra-processing marker, but it is not a proven hazard at food doses.
What regulators actually say
EFSA's 2012 re-evaluation set an acceptable daily intake for BHT and did not classify it as genotoxic. The FDA permits it as generally recognized as safe within limits. Animal studies show mixed tumor-promoting and protective effects, so several consumer authorities flag it despite the favorable regulatory review.
Where you'll find it
Breakfast cereals, chips and crackers, chewing gum, packaged baked goods, and fats and oils — often listed together with BHA.
BHT: frequently asked questions
- Is BHT safe to eat?
- EFSA and the FDA permit it within set limits, and EFSA's 2012 review did not find it genotoxic. Animal data are mixed, so it is often flagged as an ultra-processing marker rather than a proven hazard.
- Is BHT worse than BHA?
- Generally the reverse — BHT is usually considered lower concern than BHA, which carries stronger carcinogenicity hazard classifications. Both are synthetic preservatives found in similar processed foods.
- Why is BHT in my cereal?
- It prevents the fats and oils in cereal from going rancid, preserving flavor and shelf life. Some brands preserve with vitamin E (tocopherols) instead.