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Quick answer: Xanthan Gum carries the heavier risk profile. Sodium Aluminum Phosphate is — in the EU and — in the US; Xanthan Gum is allowed in the EU and allowed in the US.
| Property | Sodium Aluminum Phosphate | Xanthan Gum |
|---|---|---|
| EU status | — | Allowed |
| US status | — | Allowed |
| Risk level | — | low |
| Banned in | — | — |
| Restricted in | European Union (restricted in baby food and specific food categories), Australia (restricted levels) | — |
| Category | additive | additive |
| Where it hides | — | Bob's Red Mill Gluten-Free Flour, Hidden Valley Ranch Dressing, Breyers Ice Cream |
Sodium aluminum phosphate (SALP) is a leavening acid and food additive used in baked goods, particularly self-rising flour and baking powder. It provides a slow, sustained leavening action during baking. SALP is also used as an emulsifying salt in processed cheese products.
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.
Sodium Aluminum Phosphate: The primary health concern with SALP is aluminum exposure. Dietary aluminum intake has been studied in relation to neurotoxicity, and there is ongoing scientific debate about whether chronic dietary aluminum exposure contributes to Alzheimer's disease risk. EFSA's 2008 review of dietary aluminum exposure concluded that the tolerable weekly intake (TWI) was being exceeded by some European populations based on total dietary aluminum sources, raising concern. A 2011 EFSA risk assessment noted that certain high-aluminum sources (including baked goods from SALP-containing leavening agents) contributed meaningfully to total dietary aluminum. The WHO has set a PTWI (provisional tolerable weekly intake) of 2 mg/kg body weight/week for total aluminum. However, the causal link between dietary aluminum from food-grade SALP and Alzheimer's disease has not been definitively established in human studies.
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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