Can dogs eat xylitol (birch sugar)?
No — xylitol is one of the most dangerous substances a dog can ingest. Even a small amount triggers a massive insulin release, causing life-threatening hypoglycemia (low blood sugar) within minutes. Higher doses cause acute liver failure and death. Xylitol is found in sugar-free gum, some peanut butters, toothpaste, candy, and baked goods.
Other · 240 kcal per 100 g
Benefits and risks
Benefits
Risks
- Triggers massive insulin release → severe hypoglycemia within 10-60 minutes
- Higher doses cause acute hepatic necrosis (liver cell death) within 12-72 hours
- As little as 0.1 g/kg body weight can cause hypoglycemia
- 0.5 g/kg can cause liver failure
- Found in: sugar-free gum, peanut butter, toothpaste, mints, candy, baked goods
- A single piece of sugar-free gum can kill a small dog
⚠ Toxic threshold
Hypoglycemia: 0.1 g/kg body weight. Liver failure: 0.5 g/kg body weight. A single piece of sugar-free gum contains 0.3-1.0 g xylitol. For a 10-pound (4.5 kg) dog: as little as 0.45 g (less than one piece of gum) can cause hypoglycemia.
Recommended serving size
Adjust portions based on your dog's weight, age, and activity level. Treats and snacks should make up no more than 10% of daily calories.
| Dog size | Weight range | Serving |
|---|---|---|
| Small dog | Under 20 lbs (9 kg) | TOXIC — do not feed any amount |
| Medium dog | 20–50 lbs (9–23 kg) | TOXIC — do not feed any amount |
| Large dog | Over 50 lbs (23 kg) | TOXIC — do not feed any amount |
How to prepare and serve
Preparation
Never allow dogs access to any product containing xylitol. Check labels on: peanut butter (look for 'xylitol,' 'birch sugar,' or 'wood sugar'), sugar-free gum and mints, sugar-free candy, toothpaste (human), some medications and supplements, sugar-free baked goods, protein bars, and some yogurts. Keep all xylitol-containing products in sealed, dog-proof containers. If ingestion is suspected, call your veterinarian or ASPCA Poison Control (888-426-4435) IMMEDIATELY — minutes matter.
Frequency
Never — fatally toxic to dogs.
Frequently Asked Questions
- Xylitol is found in a surprisingly wide range of products: sugar-free chewing gum (the most common source of dog poisonings), some peanut butter brands, sugar-free candy and mints, human toothpaste and mouthwash, some medications and vitamin supplements (especially chewable or liquid forms), sugar-free baked goods, sugar-free jams and jellies, some protein bars and diet foods, nasal sprays, and some skincare products. On ingredient labels, xylitol may also appear as 'birch sugar,' 'birch sweetener,' 'wood sugar,' or simply as part of 'sugar alcohols.' Always read labels on any product your dog might access.
- Xylitol acts extremely fast in dogs. Hypoglycemia (dangerously low blood sugar) can develop within 10-60 minutes of ingestion, though some xylitol products release more slowly and symptoms may take up to 12 hours. Symptoms of hypoglycemia include vomiting, weakness, staggering, lack of coordination, tremors, collapse, and seizures. Liver failure, if it occurs, typically develops 12-72 hours after ingestion and may happen even if the initial hypoglycemia was treated successfully. This is why immediate veterinary care is critical — even if a dog initially seems fine after eating xylitol, liver damage may be developing silently.
- Xylitol poisoning requires immediate emergency veterinary care — there is no safe home treatment. At the veterinary hospital, treatment typically includes: induced vomiting if ingestion was very recent (within 30 minutes) and the dog is fully conscious; IV dextrose (sugar) infusion to counteract hypoglycemia; blood glucose monitoring every 1-2 hours; liver protectant medications (SAMe, silymarin); liver enzyme monitoring for 72+ hours; and supportive care including IV fluids. Prognosis depends on the amount ingested and speed of treatment. Dogs treated before symptoms develop have the best outcomes. Delayed treatment for liver-damaging doses carries a guarded to poor prognosis.
Related other
Caffeine
ToxicToxic to dogs — found in coffee, tea, energy drinks, soda, and caffeine pills. Can cause seizures, cardiac arrest, and death.
Chocolate
ToxicContains theobromine and caffeine — both toxic to dogs. Dark and baker's chocolate are the most dangerous. Can be fatal.
Cinnamon
CautionSmall amounts won't harm dogs, but cinnamon powder can irritate the mouth, and cinnamon oil is toxic. No real benefit for dogs.
Honey
CautionSmall amounts are safe for healthy adult dogs and may soothe sore throats, but high sugar content means strict portion control. Not for puppies or diabetic dogs.
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