Xanthan Gum vs Sorbic Acid: which is worse?

What is Xanthan Gum?

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.

What is Sorbic Acid?

Sorbic acid is an unsaturated fatty acid naturally occurring in the berries of the rowan tree (Sorbus aucuparia). Commercially, it is produced synthetically and used as a broad-spectrum antimicrobial preservative, effective primarily against molds and yeasts, and to a lesser extent bacteria, at acidic to neutral pH.

Documented risks

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.

Sorbic Acid: One of the safest preservatives in use. Sorbic acid is metabolized normally as a short-chain fatty acid and poses no identified carcinogenic, mutagenic, or reproductive risks. The ADI (Acceptable Daily Intake) is 25 mg/kg body weight/day, and typical dietary exposure is well below this threshold. Rare skin sensitization has been reported in cosmetic contexts but is not relevant to food consumption. EFSA and FDA both classify it as safe.