Is xanthan gum vegetarian-compatible?

Watch for

Graded borderline for SIBO fermentation. Xanthan gum is a soluble fibre, so the quarter teaspoon in a loaf is a non-event while a heaped tablespoon stirred into a smoothie can produce real gas, bloating and looseness. / The fermentation substrate never appears on the label. Corn is the most common feedstock, but wheat, soy and dairy sugars are all used commercially, and people with severe corn, soy or wheat allergy sometimes need to ask the manufacturer directly. / Certified gluten-free products use a non-wheat substrate and processing removes protein residues, but plain bulk xanthan gum sold without a gluten-free claim is worth verifying if you have coeliac disease. / Xanthan gum thickeners are not for premature infants. The FDA warned in 2011 after cases of necrotising enterocolitis in preterm babies given a xanthan gum based feed thickener. / Graded low FODMAP with no gluten, lactose or dairy protein. If a gluten-free baked good upset you, the flour blend (often chickpea, lupin, inulin or sorghum) is a far more likely culprit than the gum holding it together.