Can dogs eat xylitol?

No — xylitol is extremely toxic

No. Xylitol causes a rapid, life-threatening drop in blood sugar in dogs and, in higher doses, liver failure. Even a few pieces of sugar-free gum can be fatal to a small dog.

For a detailed calorie breakdown, see 247CalorieCheck.

✓ Reviewed against PDSA, Blue Cross & Animal PoisonLine guidance · Last updated: 2026-06-17

How we keep this site free. Some links on this page take you to Amazon or other online retailers (including vet pharmacy partners Best Vet Care and Canada Pet Care via CJ Affiliate, and treat/supplement partners via AWIN). As an Amazon Associate, CJ publisher, and AWIN publisher we may earn a commission at no extra cost to you. Full disclosure.

The full picture

Xylitol is an artificial sweetener that's among the most dangerous substances a dog can ingest. In humans it has no effect on insulin; in dogs, it triggers a massive insulin release, causing blood sugar to crash within 15–60 minutes of ingestion (hypoglycaemia). Higher doses damage the liver. It's now in far more UK products than most owners realise: sugar-free chewing gum, many 'low-sugar' peanut butters, mints, some baked goods, sugar-free candy, some medicines, toothpaste, mouthwash, and increasingly in 'healthy' snack bars and low-sugar yogurts. Xylitol is sometimes listed as 'birch sugar' on ingredient labels — a name dog owners should memorise. As little as 0.1 g per kg of body weight causes hypoglycaemia; 0.5 g per kg can cause liver failure. A single piece of xylitol-sweetened gum can contain 0.3–1 g of xylitol — potentially lethal to a small dog.

Check individual ingredient safety at 247IngredientsCheck.

If your dog has already eaten xylitol

  • This is a medical emergency — call your vet immediately, even if only a small amount was eaten and your dog seems fine
  • If your vet is closed, call the ASPCA Animal Poison Control Center on (888) 426-4435 or Pet Poison Helpline on (855) 764-7661 or the nearest 24/7 emergency vet
  • Bring the packaging with you — the vet needs to know exact xylitol content
  • Do NOT induce vomiting yourself unless instructed — hypoglycaemia can crash fast and vomiting makes it worse
  • Do not give sugar or honey at home unless your vet specifically tells you to
  • Get to a vet within 30 minutes if at all possible

Risks to watch for

  • Rapid, severe hypoglycaemia (low blood sugar) within 15–60 minutes
  • Vomiting (often the first sign)
  • Weakness, staggering, collapse
  • Seizures
  • Liver failure at higher doses (may appear 12–72 hours after ingestion)
  • Death if untreated

Safe portion size

None — zero. There is no safe amount.

Safer alternatives

  • Dog-safe peanut butter (xylitol-free, check label)
  • Blueberries
  • Plain cooked chicken pieces for training

Does size or breed matter?

Xylitol toxicity is severely dose-dependent on body weight — small and toy breeds reach a life-threatening dose from a tiny fraction of what a large dog would need to consume. This is one of the few genuinely time-critical toxins on this site regardless of the dog's size; always treat suspected xylitol ingestion as an emergency.

Common questions

My peanut butter says 'no added sugar' — is it safe?
Not automatically. 'No added sugar' peanut butters sometimes use xylitol as a sweetener. Always check the ingredients. The safest peanut butters list only 'peanuts' or 'peanuts and salt'.
My dog licked my toothpaste — is that a problem?
A single lick probably isn't enough to cause serious harm in most dogs, but xylitol content varies between brands. Check the tube. If in doubt, call your vet, especially for smaller dogs.
What's 'birch sugar'? Is it the same thing?
Yes. 'Birch sugar' is a marketing-friendly name for xylitol. Products often use this name on front-of-pack claims while still listing xylitol in the full ingredients. Treat them as the same thing.
How much xylitol is dangerous?
Roughly 0.1 g per kg of body weight causes hypoglycaemia, and 0.5 g per kg can cause liver failure. For context, a single piece of sugar-free gum can contain 0.3–1 g of xylitol. Small dogs are at risk from very small amounts.
My dog seems fine hours after eating xylitol — are they OK?
Possibly, but liver damage can appear 12–72 hours later even if the initial hypoglycaemia was mild or avoided. If there's any chance they ate a meaningful amount, your vet may recommend monitoring bloodwork.
Is stevia or aspartame also dangerous?
No. Stevia, aspartame, sucralose, erythritol, and monk fruit are not toxic to dogs the way xylitol is. Xylitol is uniquely dangerous. That said, sugar-free products can still cause digestive upset and aren't 'dog treats.'

Related foods

Peanut butter caution Chocolate no Sugar caution
Important: This page is general information, not veterinary advice. Every dog is different, and individual factors (age, breed, health conditions, medications) can change what's safe. If in doubt, always contact your vet — or the ASPCA Animal Poison Control Center on (888) 426-4435 or Pet Poison Helpline on (855) 764-7661 in the UK.