BHT (Butylated Hydroxytoluene)
Last reviewed October 18, 2026 · Evidence strength: Limited · How we grade evidence
In plain words: BHT is a preservative that keeps cereal, gum and snack fats fresh. European experts found it doesn't damage genes and set a safe daily limit, though some heavy-eating kids might go over it. FDA began a fresh review in 2026. It's less concerning than its cousin BHA, and many brands now skip it.
Also listed on labels as: BHT, Butylated hydroxytoluene, E321
What is it, and why is it in food?
BHT is a synthetic antioxidant that keeps fats from going rancid. It's in cereal (sometimes only in the bag liner), pizza, chewing gum and snack foods.
What does the science say?
| The popular claim | "Synthetic preservatives BHA and BHT should be avoided." (Dr. Eric Berg) |
| Our verdict on that claim | Partly supported |
| Evidence strength | Limited: animal and lab data; EU found no genetic-damage concern; no human outcome data. |
| Kinds of studies | Animal studies, regulatory reviews |
- Safety review: EFSA (2012) found BHT is not a genetic-damage concern and that any cancer effect has a threshold. It set a safe daily limit of 0.25 mg per kg of body weight and noted that some high-eating children may exceed it.1
- People: No human outcome data exist.
What do regulators say?
- FDA permits BHT within limits; it launched a reassessment in May 2026.2
- EU: permitted (E321) with a safe daily limit.1
Who should be careful?
- Kids who eat a lot of cereal and gum are the group most likely to exceed Europe's limit.
How common is it in US foods?
In our check of USDA's Branded Foods database, 8,810 of 438,129 US packaged foods with an ingredient list name BHT (about 2.0%, or roughly 1 in 50).3 It shows up most often in: cereal (1,428); pizza (1,179); chewing gum & mints (1,040); cakes, cupcakes, snack cakes (456); processed cereal products (275). These are label records companies sent to USDA, mostly in 2021 to 2023, so some products have changed since. Counts come from a text match of ingredient lists and are approximate.
Swaps and tips for families
- Many cereals have dropped BHT or use vitamin E (tocopherols) instead; compare boxes.
- Oatmeal, plain shredded wheat and similar simple cereals usually skip it.
Beyond the plate: related non-food exposures
BHT is also used in cosmetics, lip products, chewing gum and food-packaging liners.
Frequently asked questions
Is BHT bad for you?
Probably not at typical amounts. European experts found no genetic-damage concern and set a safe daily limit, but FDA is re-reviewing it.
Why is BHT in cereal?
To keep the fats in grains from going stale. Some brands put it in the bag liner rather than the cereal.
Is BHT the same as BHA?
No. They're related, but BHA has stronger animal cancer evidence.
Related guides
Sources
Every source below was checked against PubMed, the publisher or the official page by our research team in October 2026.
- Scientific Opinion on the re-evaluation of butylated hydroxytoluene BHT (E 321) as a food additive. EFSA J, 2012. PubMed 42111992 · doi:10.2903/j.efsa.2012.2588
- FDA post-market chemical assessment: FY2026 work plan. Link
- FoodData Central, Branded Foods dataset (release 2026-04-30). U.S. Department of Agriculture, Agricultural Research Service, 2026. Link
This guide is for general education. It is not medical advice and does not replace advice from your doctor, pediatrician, allergist or registered dietitian. If you think you or your child reacted to a food, talk to a health professional. Research changes; we review these pages when new evidence or rules come out. Last reviewed October 18, 2026. Spotted an error? Email [email protected].