Can dogs eat xylitol?
Toxic. No. Xylitol triggers a massive insulin release in dogs and can cause life-threatening low blood sugar within under an hour.
Work out the dose for your dog
The amount matters as much as the food. The xylitol toxicity calculator for dogs takes your dog's weight and what it ate and returns the dose in mg/kg, with the severity band it falls into.
Open the xylitol toxicity calculator for dogs →If it has already been eaten
Your own vet, or the nearest 24-hour emergency animal hospital.
ASPCA Animal Poison Control Center: (888) 426-4435
Pet Poison Helpline: (855) 764-7661
Have ready: your dog's weight, the exact product and how much was eaten, and the time it happened.
How much is dangerous?
Merck and the FDA describe hypoglycemia from roughly 0.1 g/kg and a risk of acute liver failure from roughly 0.5 g/kg. A single piece of sugar-free gum can carry enough to affect a small dog.
Why it does harm
In dogs, xylitol is a potent stimulus for pancreatic insulin release — unlike in humans, where it is not. The resulting hypoglycemia can be profound. At higher doses xylitol also causes acute hepatic necrosis, by a mechanism that is not fully established.
Sources
What to look for
- Vomiting, often first
- Weakness, staggering and collapse
- Tremors and seizures from low blood sugar
- Later, jaundice and bleeding if the liver is affected
Timing. Hypoglycemia can begin within 30 minutes, though some products delay it for hours. Liver injury may take 24 to 72 hours to appear.
What to do
- Call a vet immediately. This is one of the fastest-acting common poisonings there is.
- Take the packaging — xylitol content is rarely printed, so the brand and product matter.
- Do not try to treat low blood sugar at home unless a vet tells you to.
How much xylitol is dangerous for your dog’s weight?
Merck links doses above about 0.1 g of xylitol per kg of body weight to low blood sugar, and above about 0.5 g per kg to liver failure. These are grams of xylitol itself, not of the product.
| Dog weight | Low blood sugar | Liver failure risk |
|---|---|---|
| 10 lb | 0.45 g | 2.3 g |
| 25 lb | 1.1 g | 5.7 g (0.2 oz) |
| 50 lb | 2.3 g | 11 g (0.4 oz) |
| 75 lb | 3.4 g (0.1 oz) | 17 g (0.6 oz) |
| 100 lb | 4.5 g (0.2 oz) | 23 g (0.8 oz) |
Labels rarely say how much xylitol a product holds. One piece of xylitol gum can carry anywhere from about 0.22 g to 1 g, so for a small dog a single piece can be enough. If you cannot tell how much was eaten, treat it as an emergency.
For your dog’s exact weight and the exact product, use the xylitol toxicity calculator for dogs.
Common questions
What products contain xylitol?
Sugar-free gum and candy are the classic sources. The FDA also lists breath mints, baked goods, cough syrup, chewable vitamins, mouthwash, toothpaste, some peanut and nut butters, and sugar-free desserts. Check the label for xylitol or birch sugar before sharing anything sugar-free.
Can a dog survive xylitol poisoning?
Most can with prompt treatment. Merck describes the outlook for uncomplicated low blood sugar as good when treatment starts promptly. Liver injury is far more serious: in one study Merck cites, 62.5% of dogs with clinical signs of liver injury died or were euthanized despite aggressive treatment.
What will the vet do for xylitol poisoning?
Check and support blood sugar. Merck advises hospitalizing dogs that ate more than about 100 mg/kg (45 mg/lb) to measure blood glucose, and checking liver values when the dose is above 500 mg/kg (227 mg/lb). Activated charcoal, the usual poison binder, does not bind xylitol well and is not recommended.