Polysorbate 80 vs Butylated Hydroxytoluene: which is worse?
Quick answer: Butylated Hydroxytoluene carries the heavier risk profile. Polysorbate 80 is — in the EU and — in the US; Butylated Hydroxytoluene is — in the EU and — in the US.
| Property | Polysorbate 80 | Butylated Hydroxytoluene |
|---|---|---|
| EU status | — | — |
| US status | — | — |
| Risk level | — | — |
| Banned in | — | Japan (banned for food use) |
| Restricted in | European Union (ADI 25 mg/kg body weight per day), Australia | European Union (ADI-based restrictions), United Kingdom, Australia |
| Category | additive | additive |
| Where it hides | — | — |
What is Polysorbate 80?
Polysorbate 80 (Tween 80) is a synthetic nonionic surfactant and emulsifier derived from sorbitol and oleic acid (from vegetable oils) through ethoxylation. It is widely used in food to keep water-based and oil-based ingredients uniformly mixed. Chemical formula: polyoxyethylene (20) sorbitan monooleate.
What is Butylated Hydroxytoluene?
Butylated hydroxytoluene (BHT) is a synthetic phenolic antioxidant preservative derived from petroleum. A white crystalline solid with formula C15H24O, it prevents fat oxidation in processed foods, cosmetics, and industrial applications. Often used synergistically with BHA.
Documented risks
Polysorbate 80: Emerging research has raised concerns about polysorbate 80's effects on the gut. A landmark 2015 study in Nature (Chassaing et al.) found that dietary polysorbate 80 and polysorbate 60 at concentrations approaching food use levels promoted colitis and metabolic syndrome in genetically susceptible mice by disrupting the intestinal mucus layer and altering gut microbiome composition. The emulsifiers thinned the protective mucus layer, allowing bacteria to come into closer contact with gut epithelial cells and triggering inflammation. This study was a seminal contribution to gut health research, though it was conducted in mice and requires confirmation in humans. A 2020 follow-up study found that dietary emulsifiers including polysorbate 80 promoted gut inflammation and altered gut microbiome in human participants with Crohn's disease. People with inflammatory bowel disease may be most vulnerable to polysorbate 80's potential gut effects.
Butylated Hydroxytoluene: BHT has complex, bidirectional carcinogenicity data — some NTP bioassays found liver tumors in female mice at high doses, while other studies suggested BHT might inhibit cancer initiation. IARC has not formally classified BHT due to conflicting evidence. A 2017 study linked BHT to thyroid hormone disruption in female rats. The American Academy of Pediatrics (2018) recommended reducing synthetic preservative exposure including BHT in children. Kellogg's uses vitamin E in European versions of cereals that contain BHT in US versions — a commercially meaningful substitution.
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