Is Butylated Hydroxytoluene Banned? EU vs US Status, Risks & Where It Hides
TL;DR: Butylated Hydroxytoluene is banned in the EU but allowed in the US (food additives).
Also called BHT. (E321)
Other names: BHT, E321, 2,6-di-tert-butyl-4-methylphenol, Dibutylhydroxytoluene
Is Butylated Hydroxytoluene banned in the EU?
| EU status | Banned |
|---|---|
| US status | Allowed |
| Risk level | — |
| Where it shows up | Kellogg's cereals (certain US formulations), Post cereals, Some potato chips, Vegetable oils and shortenings, Some chewing gum, Various packaged snacks |
What is Butylated Hydroxytoluene?
Butylated hydroxytoluene (BHT) is a synthetic lipophilic phenolic antioxidant preservative derived from petroleum. It is a white crystalline solid with chemical formula C15H24O. Like BHA, it prevents fat oxidation and is widely used in food, cosmetics, pharmaceuticals, jet fuel, and rubber.
Why is Butylated Hydroxytoluene used in food?
BHT prevents oxidative rancidity of fats, oils, and fat-containing foods, extending shelf life. It is heat-stable and effective at very low concentrations. Used in cereals, snack foods, oils, and cosmetics. Often used synergistically with BHA.
Is Butylated Hydroxytoluene dangerous? Documented risks
BHT's carcinogenicity profile is complex and bidirectional. Some NTP bioassays found liver tumors in female mice at high doses, while other studies suggested BHT might inhibit tumor initiation in certain contexts. A 1986 NTP bioassay found liver tumors in female mice but anti-carcinogenic effects in the rat forestomach — making BHT's net carcinogenicity uncertain. IARC has not formally classified BHT in a specific Group due to this conflicting evidence. The NTP notes that BHT's carcinogenicity data are complex. The 'Report on Carcinogens' does not currently list BHT, unlike BHA, but the NTP has noted inconclusive evidence. Potential endocrine disruption: a 2017 study in Environmental Science & Technology found BHT disrupted thyroid hormone levels in female rats. Multiple animal studies have demonstrated weak estrogenic effects. The American Academy of Pediatrics' 2018 policy statement on food additives mentioned BHT as a synthetic preservative warranting reduced childhood exposure. Kellogg's Frosted Flakes in the US contains BHT to preserve freshness; the European version uses mixed tocopherols (vitamin E) instead — a commercially meaningful difference demonstrating feasibility of substitution. Japan banned BHT for food use based on its precautionary approach. The EU restricts it with ADI-based maximum permitted levels.
Common US products containing Butylated Hydroxytoluene
How to avoid Butylated Hydroxytoluene: safer alternatives
Mixed tocopherols (vitamin E), rosemary extract, ascorbyl palmitate, and natural antioxidant blends replace BHT effectively. Kellogg's and Post reformulate European versions of the same cereals with mixed tocopherols instead of BHT. Modified atmosphere packaging reduces the need for chemical antioxidants.
Frequently asked questions about Butylated Hydroxytoluene
Is BHT safe?
FDA considers BHT GRAS at permitted food use levels. Japan banned it; EU restricts it. NTP studies show bidirectional carcinogenicity effects in animals. Thyroid and estrogenic effects documented in animal studies. Precautionary case for avoidance is reasonable, especially for children.
What foods contain BHT?
Some Kellogg's and Post cereals, potato chips, vegetable oils, shortenings, chewing gum, and various packaged snack foods. Check for 'BHT,' 'butylated hydroxytoluene,' or 'E321.' Note that the same cereals sold in Europe use vitamin E instead.
What is the difference between BHT and BHA?
Both are synthetic phenolic antioxidants. BHA is IARC Group 2B. BHT has more complex, bidirectional carcinogenicity data. Both restricted in Japan and EU but broadly permitted in US.
Is BHT in cereals harmful?
At food use levels, FDA considers it not acutely harmful. However, Japan's complete ban, EU restrictions, NTP carcinogenicity studies, and potential endocrine effects are concerns. The same cereals use vitamin E in Europe.
Is BHT a carcinogen?
Complex. Some NTP studies found liver tumors in female mice at high doses. Other studies suggest BHT may inhibit certain cancer initiation. IARC has not formally classified BHT. Japan banned it; EU restricts it — reflecting precautionary uncertainty.
Can BHT disrupt hormones?
Yes, potentially. Animal studies show BHT can interact with estrogen receptors and disrupt thyroid hormone levels (2017 study in Environmental Science & Technology). Human relevance at typical dietary exposures is uncertain.
How do I avoid BHT?
Check labels for 'BHT,' 'butylated hydroxytoluene,' or 'E321.' Choose organic-certified products or products labeled 'no artificial preservatives.' Look for mixed tocopherols or rosemary extract as preservatives.
Why is BHT legal in the US but banned in Japan?
Japan applies precautionary approach to synthetic food additives. The FDA requires more definitive evidence of harm at realistic human exposure levels. This fundamental regulatory philosophy difference explains many such discrepancies.
Scan any product's barcode and instantly see if it contains Butylated Hydroxytoluene or other ingredients banned overseas.
Scan a product free →Related food additives
Avoiding banned food additives? Check your beauty shelf, too.
Sources
- NTP Carcinogenesis Studies of BHT (Technical Report 150) — NTP/NIH
- EFSA Scientific Opinion on BHT (E 321) 2012 — EFSA
- AAP 2018 Policy Statement on Food Additives — AAP
- EWG on BHT in food and cosmetics — EWG
Our scores are never influenced by brands. Last updated 6/10/2026.