Xanthan Gum

Last reviewed October 18, 2026 · Evidence strength: Moderate · How we grade evidence

In plain words: Xanthan gum is a thickener made by fermenting sugar with bacteria. It's in salad dressings, sauces and gluten-free baking. There's no good evidence it harms healthy kids or adults. The exception is premature babies: a xanthan-gum feed thickener was linked to a serious gut illness, so only thicken an infant's feeds if your doctor directs it.

Also listed on labels as: Xanthan gum, E415

What is it, and why is it in food?

Xanthan gum is made by bacteria fermenting sugar, then purified into a powder. A tiny amount makes liquids thick and stable. It's in salad dressings, sauces, ice cream, gluten-free bread and many snack cakes.

What does the science say?

• Gut harm in general: No human evidence of harm for the general population. The pesticide idea is speculative; xanthan gum is purified after fermentation.
• Premature infants: FDA scientists linked a xanthan-gum thickener (SimplyThick) to late-onset necrotizing enterocolitis, a serious gut condition, in infants.¹ Three premature babies developed it after thickened feeds.²
• Population study: NutriNet-Santé linked xanthan gum and other thickeners with slightly higher type 2 diabetes risk. That's a link, not proof.³

What do regulators say?

• EFSA (2023) found no safety concern for xanthan gum, including in special medical formulas for infants under 16 weeks at the highest exposure.⁴
• US: GRAS. FDA warned against using the SimplyThick thickener for premature infants.

Who should be careful?

• Premature and young infants: only use thickened feeds under medical supervision.
• Everyone else can enjoy it without worry.

How common is it in US foods?

In our check of USDA's Branded Foods database, 49,068 of 438,129 US packaged foods with an ingredient list name xanthan gum (about 11.2%, or roughly 1 in 9).⁵ It shows up most often in: cakes, cupcakes, snack cakes (4,549); salad dressing & mayonnaise (3,862); ice cream & frozen yogurt (3,094); ketchup, mustard, bbq & cheese sauce (2,332); cheese (1,934). It's one of the most common thickeners in our data, especially in snack cakes, dressings and ice cream. These are label records companies sent to USDA, mostly in 2021 to 2023, so some products have changed since. Counts come from a text match of ingredient lists and are approximate.

Swaps and tips for families

• No swap needed for most families.
• Gluten-free bakers can use psyllium husk or ground flax as alternatives if preferred.

Beyond the plate: related non-food exposures

Xanthan gum is also used in toothpaste and cosmetics. No concern identified.

Frequently asked questions

Is xanthan gum bad for you?

No, not for most people. Europe's safety review found no concern, and there's no human evidence of harm in healthy people.

Is xanthan gum safe for babies?

Never thicken a premature or young baby's feeds without medical advice. A xanthan-gum thickener was linked to a serious gut illness in premature infants.

Is xanthan gum gluten-free?

Yes. It's widely used in gluten-free baking to replace gluten's stretch.

Related guides

• Guar Gum
• Carrageenan
• Emulsifiers and thickeners

Sources

Every source below was checked against PubMed, the publisher or the official page by our research team in October 2026.

1. Late onset necrotizing enterocolitis in infants following use of a xanthan gum-containing thickening agent. The Journal of pediatrics, 2012. PubMed 22575248 · doi:10.1016/j.jpeds.2012.03.054
2. Development of necrotizing enterocolitis in premature infants receiving thickened feeds using SimplyThick®. Journal of perinatology : official journal of the California Perinatal Association, 2012. PubMed 22289705 · doi:10.1038/jp.2011.105
3. Food additive emulsifiers and the risk of type 2 diabetes: NutriNet-Santé. Lancet Diabetes Endocrinol, 2024. PubMed 38663950 · doi:10.1016/S2213-8587(24)00086-X
4. Re-evaluation of xanthan gum (E 415) as a food additive in foods for infants below 16 weeks of age and follow-up of its re-evaluation as a food additive for uses in foods for all population groups. EFSA journal. European Food Safety Authority, 2023. PubMed 37151988 · doi:10.2903/j.efsa.2023.7951
5. FoodData Central, Branded Foods dataset (release 2026-04-30). U.S. Department of Agriculture, Agricultural Research Service, 2026. Link

This guide is for general education. It is not medical advice and does not replace advice from your doctor, pediatrician, allergist or registered dietitian. If you think you or your child reacted to a food, talk to a health professional. Research changes; we review these pages when new evidence or rules come out. Last reviewed October 18, 2026. Spotted an error? Email [email protected].