✓ Reviewed against PDSA, Blue Cross & Animal PoisonLine guidance · Last reviewed: 2026-04
Can dogs eat xylitol?
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 sweets, some medicines, toothpaste, mouthwash, and increasingly in 'healthy' snack bars and low-sugar yoghurts. 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.
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 Animal PoisonLine on 01202 509000 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
Information to have ready when you call:
- Exact product name and brand
- Whether xylitol is confirmed in the ingredients (or 'birch sugar')
- Amount eaten (count pieces of gum, weigh peanut butter, etc.)
- Xylitol content if listed on packaging
- Time of ingestion
- Your dog's weight
- Any symptoms already appearing
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
What to watch for — and when
[{'when': '15–60 minutes', 'signs': 'Vomiting, often the first visible sign'}, {'when': '30 minutes – 2 hours', 'signs': 'Hypoglycaemia — weakness, wobbling, collapse, seizures'}, {'when': '12–72 hours', 'signs': 'Liver damage at higher doses — jaundice, ongoing vomiting, lethargy'}]
Hidden sources to check
- Sugar-free chewing gum (Orbit, Extra, Trident, some Wrigley's)
- Some peanut butters — especially 'no sugar added' or 'keto' brands (always check label)
- Sugar-free mints and sweets
- Some sugar-free chocolate and protein bars
- Low-sugar jams and baked goods
- Sugar-free ice cream and yoghurt
- Toothpaste (human) and some mouthwashes
- Some children's and adult medicines (especially gummies)
- Chewable vitamins and supplements
- Listed as 'birch sugar' on some ingredient labels
Breed-specific notes
- Small breeds reach toxic doses on very small amounts — a single stick of sugar-free gum can cause hypoglycaemia in a 5 kg dog.
- Flat-faced breeds: never induce vomiting at home.
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
If xylitol has been ingested, call your vet immediately and see Pet First Aid UK for the emergency steps.
Common questions
My peanut butter says 'no added sugar' — is it safe?
My dog licked my toothpaste — is that a problem?
What's 'birch sugar'? Is it the same thing?
How much xylitol is dangerous?
My dog seems fine hours after eating xylitol — are they OK?
Is stevia or aspartame also dangerous?
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