Loading…
Quick answer: Mercury compounds carries the heavier risk profile. Mercury compounds is banned in the EU and allowed in the US; Tertiary Butylhydroquinone is — in the EU and — in the US.
| Property | Mercury compounds | Tertiary Butylhydroquinone |
|---|---|---|
| EU status | Banned | — |
| US status | Allowed | — |
| Risk level | high | — |
| Banned in | European Union | Japan (banned for food use) |
| Restricted in | — | European Union (banned in baby foods; restricted in fats/oils to 100-200 mg/kg), United Kingdom, Australia |
| Category | heavy metal | additive |
| Where it hides | skin-lightening cream, mascara | — |
Mercury compounds is mercury and mercury salts used as preservatives and skin lighteners.
Tertiary butylhydroquinone (TBHQ) is a synthetic phenolic antioxidant preservative derived from butane. It is one of the most potent antioxidants for polyunsaturated fats and oils and is commonly used in fast-food frying oils. Its chemical formula is C10H14O2.
Mercury compounds: Mercury is a potent neurotoxin. Banned in EU cosmetics; the US limits it to trace levels but enforcement gaps allow contaminated imports.
Tertiary Butylhydroquinone: At high doses in animal studies, TBHQ has been shown to cause precancerous stomach lesions (squamous cell hyperplasia) in female rats. A study in Food and Chemical Toxicology documented these dose-dependent precancerous changes. The FDA limits TBHQ to 0.02% of fat content, reflecting dose-dependent safety thresholds. Immune function concerns emerged from research published around 2019-2020. A study (Farouk Musa and colleagues) found that TBHQ impaired the adaptive immune response to influenza in mouse models, including reduced effectiveness of influenza vaccination. EWG highlighted this research in its analysis. These findings have not been confirmed in human clinical trials but raised new dimensions of concern beyond cancer. Neurotoxicity: animal studies have documented TBHQ can cause precursors to certain types of cell injury in neural tissue at high doses, though effects at typical dietary exposure are not established. Allergic reactions including urticaria and contact dermatitis from TBHQ-containing cosmetics and personal care products are documented in dermatology literature. Japan banned TBHQ for food use. The EU restricts it in baby food (completely banned) and in adult food categories with maximum permitted levels. Australia and the UK restrict it.
Scan a barcode and we'll flag both Mercury compounds and Tertiary Butylhydroquinone (plus 200+ other ingredients banned overseas).
Scan free →