Polyol sweetener · Polyol · E967
Is xylitol low FODMAP?
The short answer
No — xylitol (E967) is not low FODMAP. It's a polyol sugar alcohol, and while it's tooth-friendly and as sweet as sugar, it's poorly absorbed and has a strong laxative effect. In sensitive guts it causes gas, bloating, and diarrhea, sometimes from a surprisingly small amount.
What xylitol is
Xylitol is a sugar alcohol with almost exactly the sweetness of table sugar and about 40% fewer calories. It's found in small amounts in many fruits and vegetables and is manufactured commercially from birch or corn fiber. It's best known for being "tooth-friendly" because oral bacteria can't ferment it.
Why it’s in your food
Xylitol's big selling point is a 1:1 sweetness with sugar, so it swaps in cleanly without the aftertaste of some sweeteners. It's used in "dental" and sugar-free gum and mints, sugar-free sweets, and increasingly in low-sugar baking products and some peanut butters. The dental-health angle drives most of its use.
The science, in plain language
Xylitol is absorbed slowly and incompletely in the small intestine, so a large share reaches the colon, where it draws in water osmotically and is fermented into gas. It's well documented for its laxative effect at higher intakes, and Monash University classifies it as high FODMAP. The same property that makes it non-cariogenic in the mouth — resistance to fermentation by oral bacteria — doesn't protect the gut, where colonic bacteria ferment it readily.
What it feels like
Bloating, gas, cramping, and diarrhea. Xylitol's laxative threshold is meaningful, so larger servings (or a habit of sugar-free gum through the day) can cause pronounced symptoms even in people without IBS.
What to look for on the label
The same ingredient shows up under several names. On an ingredient list, watch for:
Commonly hides in
- •"Tooth-friendly" and sugar-free gum and mints
- •Sugar-free sweets and chocolate
- •Low-sugar and keto baking sweeteners
- •Some "no added sugar" peanut butters and spreads
- •Sugar-free lozenges and dental products
Better-tolerated alternatives
Erythritol is the polyol to reach for instead: it's chemically similar but mostly absorbed and excreted before it reaches the colon, so it's far gentler and Monash rates it low FODMAP at moderate servings. Erythritol is often blended with stevia or monk fruit for a 1:1 sugar swap. For baking, glucose-based sugars avoid polyols entirely.
The bottom line
Tooth-friendly, but not gut-friendly. A high-FODMAP polyol with a real laxative effect — one of the sweeteners most worth swapping for erythritol.
Frequently asked questions
Is xylitol low FODMAP?
No. Xylitol is a polyol sugar alcohol that Monash University classifies as high FODMAP. It's poorly absorbed and ferments in the colon, with a notable laxative effect, so it's best limited during elimination and tested carefully during polyol reintroduction.
Is xylitol or erythritol better for a sensitive gut?
Erythritol is generally much better tolerated. Both are sugar alcohols, but the body absorbs around 90% of erythritol in the small intestine and excretes it unchanged, so little reaches the colon to ferment. Xylitol, by contrast, is poorly absorbed and high FODMAP. For most sensitive guts, erythritol is the gentler choice.
Is it true xylitol is dangerous for dogs?
Yes — this is a genuine safety point, though separate from FODMAPs. Xylitol is highly toxic to dogs even in small amounts and can cause dangerous drops in blood sugar. Keep xylitol-containing gum, sweets, and peanut butter well away from pets. In humans, the concern is digestive, not toxic.
Related hidden FODMAPs
This page is for informational purposes only and is not medical advice. Xylitol is safe for the general population; the FODMAP concerns described here apply to people with IBS or FODMAP sensitivity, and tolerance is individual. FODMAP classifications reflect Monash University testing and the published FODMAP literature. Always work with your doctor or a registered dietitian on dietary changes.