health
Xylitol toxicity
Why it is dangerous
In humans, xylitol has almost no insulin effect. In dogs, the pancreas mistakes it for glucose and releases a large bolus of insulin. Blood sugar can crash within 10–60 minutes of ingestion. Doses above roughly 0.5 g/kg body weight are associated with hepatic necrosis, which can be delayed 12–72 hours.
Cats appear less sensitive but the ASPCA still recommends avoiding exposure. There is no safe threshold to feed on purpose.
Common household sources
- Sugar-free chewing gum and mints (highest risk, dose per piece can be enough for a small dog)
- 'No-sugar-added' peanut butter and nut butters — always read the label before using on a lick mat or pill
- Sugar-free baked goods, protein bars, and yogurt
- Some children's chewable vitamins and prescription medications
- Nasal sprays and mouthwashes
If your dog ate xylitol
Treat as an emergency. Call your veterinarian or ASPCA Animal Poison Control (888-426-4435) immediately with the product name, listed xylitol content, estimated amount, and your dog's weight. Do not wait for symptoms; hypoglycemia can appear before you notice anything is wrong.
Why it matters
Xylitol is one of the few human foods that can kill a healthy dog from a single accidental serving. Screening the peanut butter jar and the gum on your nightstand costs nothing and prevents an ICU visit.
Frequently asked questions
- How much xylitol is toxic?
- Hypoglycemia can occur at doses above ~0.1 g/kg; liver injury above ~0.5 g/kg. A single stick of some sugar-free gums contains 0.3–1.0 g. Treat any ingestion as urgent.
- Is xylitol in all peanut butter?
- No — most traditional peanut butters do not contain xylitol. Some 'no-sugar-added' or 'keto' brands do. Read every jar before feeding.