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Quick answer: Propyl Gallate carries the heavier risk profile. Propyl Gallate is — in the EU and — in the US; Xanthan Gum is allowed in the EU and allowed in the US.
| Property | Propyl Gallate | Xanthan Gum |
|---|---|---|
| EU status | — | Allowed |
| US status | — | Allowed |
| Risk level | — | low |
| Banned in | Japan (banned for food use) | — |
| Restricted in | European Union (restricted to 200 mg/kg in specific fat/oil applications), United Kingdom, Australia | — |
| Category | additive | additive |
| Where it hides | — | Bob's Red Mill Gluten-Free Flour, Hidden Valley Ranch Dressing, Breyers Ice Cream |
Propyl gallate is a synthetic antioxidant preservative derived from gallic acid and propanol. It prevents oxidation of fats and oils, extending shelf life of fat-containing foods. It is often used in combination with BHA and BHT for synergistic antioxidant effect. Chemical formula: C10H12O5.
Xanthan gum is a polysaccharide produced by fermentation of sugars by the bacterium Xanthomonas campestris. It is a white to off-white powder that dissolves in cold or hot water to form a viscous gel. It is widely used as a thickener and stabilizer and is a key ingredient in gluten-free baking.
Propyl Gallate: Animal studies have shown propyl gallate may cause liver damage at high doses. Concerns about estrogenic activity have been raised — some studies suggest propyl gallate may weakly mimic estrogen. Contact dermatitis and allergic reactions are documented in both food and cosmetic applications. Japan banned propyl gallate for food use as part of its precautionary approach to synthetic food preservatives. NTP bioassays found dose-dependent liver effects. EFSA's re-evaluation set an ADI of 0.1 mg/kg body weight — one of the lowest ADIs for food additives, reflecting toxicological concern.
Xanthan Gum: Generally recognized as safe by both FDA and EFSA. At high doses, xanthan gum can have laxative effects due to its fermentable fiber content, producing gas and bloating in some individuals. A 2011 case report in the journal Pediatrics raised concerns about xanthan gum in infant formula (as 'Simply Thick') being associated with necrotizing enterocolitis; the FDA subsequently advised against its use in premature infants. For healthy adults consuming normal food amounts, it poses no significant health risk.
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