Is xanthan gum gluten-free?
Xanthan gum is gluten-free. It's produced by fermenting sugar (usually from corn, soy, or dairy) with the bacterium Xanthomonas campestris. While the fermentation substrate could theoretically include wheat, major commercial producers use corn or soy, and gluten-free certification is standard for baking-grade xanthan gum.
When it's safe
- The product is from a major baking brand (Bob's Red Mill, Anthony's, NOW Foods) — all certified GF
- The product label specifies gluten-free or the source is corn, soy, or dairy
When to avoid it
- The xanthan gum is in a premixed flour blend that also contains wheat (check the whole ingredient list)
Not sure about a specific product?
GF Scanner is an iOS app that scans barcodes and ingredient labels to detect gluten in seconds. It's free to download, includes 1 free barcode scan and forever-free offline ingredient-label text scanning, and offers a free trial for Pro barcode scanning and AI analysis. It works on packaged foods worldwide and supports 33 languages.
Download FreeFrequently asked questions
Why is xanthan gum in gluten-free baking?
Gluten-free flours lack the elasticity that gluten provides in wheat-based baking. Xanthan gum mimics that elasticity, helping GF breads, pizzas, and cakes hold structure.
Is xanthan gum made from wheat?
Very rarely. Commercial xanthan gum is usually fermented on corn or soy substrate. Even wheat-derived xanthan gum tests below 20 ppm after processing, but if you're avoiding wheat entirely, look for certified GF brands.