Can Cats Eat Cinnamon?
Conditional: small amounts of Ceylon cinnamon probably won’t harm most cats, but Cassia (high in coumarin), cinnamon essential oil, and inhaled powder can be dangerous—avoid and call ASPCA if concerned.
Quick Safety Summary
- Verdict: CONDITIONAL — a tiny sprinkle of Ceylon cinnamon is unlikely to cause harm, but Cassia cinnamon (the common supermarket type), cinnamon essential oil, and inhaled cinnamon powder pose potential risks—especially to cats with liver disease.
- Toxicity concerns: coumarin (in Cassia), cinnamon essential oil (concentrated), and respiratory irritation from powder.
- Emergency: if your cat is breathing poorly, drooling excessively, vomiting, showing lethargy, seizures, or signs of liver disease, call ASPCA Animal Poison Control at (888) 426-4435 or your veterinarian immediately.
Conditional answer (first sentence)
CONDITIONAL: very small amounts of Ceylon (“true”) cinnamon are unlikely to cause harm in most healthy cats, but Cassia cinnamon (higher in coumarin), cinnamon essential oil, and inhaled cinnamon powder can be hazardous — avoid feeding cinnamon intentionally and treat exposures cautiously.Why this matters for cats
Cats have important metabolic differences compared with humans and dogs. One key difference is reduced activity of certain hepatic glucuronidation enzymes (notably UDP‑glucuronosyltransferases such as UGT1A6). These enzymes help the liver conjugate and eliminate many plant compounds, drugs, and toxins. Because cats are relatively poor at glucuronidation, they can be more sensitive to compounds that rely on this pathway for safe clearance, including certain phenolic compounds and coumarin-related metabolites. (See Veterinary Toxicology references below.)What’s in cinnamon that could hurt a cat?
- Coumarin: a naturally occurring compound present in much higher amounts in Cassia cinnamon (often sold as “cinnamon” in supermarkets) than in Ceylon (Cinnamomum verum). Coumarin can cause liver damage in sensitive species and in high doses.
- Volatile essential oils: cinnamon bark and leaf oils (contain cinnamaldehyde, eugenol, and other terpenes) are highly concentrated and can cause gastrointestinal upset, central nervous system depression, or liver toxicity if ingested in sufficient quantities.
- Fine powder: inhaled spice can irritate mucous membranes and airways, potentially causing coughing, sneezing, or aspiration pneumonia in severe cases.
Nutritional snapshot (approximate, USDA-based)
- Ground cinnamon, 1 teaspoon (≈2.6 g): ~6–7 kcal; ~2.1 g carbohydrate (1.4 g dietary fiber); trace protein and fat; manganese ~0.5 mg.
- Nutritionally, cinnamon provides negligible calories for a carnivore and offers no essential nutrients cats require (they are obligate carnivores needing animal protein, taurine, etc.).
Coumarin sensitivity and liver concerns
- What is coumarin? It’s a plant-derived compound that in high doses can cause liver toxicity and bleeding disorders in some species. The European Food Safety Authority (EFSA) and other agencies have set a human tolerable daily intake (TDI) of 0.1 mg/kg body weight/day based on liver toxicity data.
- Why cats are different: Cats’ reduced glucuronidation capacity means they clear many substances more slowly. There is no established safe daily intake of coumarin for cats; they may be more susceptible to liver injury from the same exposure that humans tolerate.
- Cassia vs Ceylon: Cassia cinnamon can contain much higher coumarin concentrations (variable, but often orders of magnitude greater than Ceylon cinnamon). Because of this, even a very small amount of Cassia powder could deliver a coumarin dose that would exceed conservative limits used in humans—and cats may be even more sensitive.
- Human TDI: 0.1 mg coumarin/kg/day. For a 4 kg cat that human-based TDI would be 0.4 mg coumarin/day (but this is NOT a safe limit for cats — cats may be more sensitive).
- If Cassia averaged ~1% coumarin by weight (10 mg/g), then 0.4 mg coumarin corresponds to ~0.04 g cinnamon (<0.02 teaspoon). This shows how small an amount can exceed human-based reference values—again, with the caveat that this is illustrative and conservative. Because coumarin concentration varies and cat-specific thresholds are unknown, the safest option is to avoid Cassia cinnamon entirely.
Essential oil toxicity (cinnamon oil)
- Cinnamon essential oil is a concentrated extract containing high levels of cinnamaldehyde and eugenol. These compounds can cause severe gastrointestinal irritation, liver stress, and even central nervous system signs if ingested.
- Topical or inhaled essential oils have caused toxicity in cats in veterinary reports; small oral doses of essential oils can be far more dangerous than the same amount of the ground spice.
- Recommendation: never give cinnamon essential oil or products containing concentrated cinnamon oil to your cat; avoid diffusing oils around cats, and keep oil bottles locked away.
Inhalation and powder risks
- Cinnamon “challenge” stunts (inhaling a spoonful of cinnamon) are dangerous in people and can be catastrophic for cats: inhaled powder can obstruct airways, irritate lungs, cause coughing, choking, bronchospasm, or aspiration pneumonia.
- Even sprinkling powder near a curious cat can trigger sneezing, gagging, or inhalation. Keep powdered spices away from pets’ faces.
Clinical signs of cinnamon-related toxicity in cats
- Gastrointestinal: vomiting, diarrhea, drooling, abdominal pain, decreased appetite
- Respiratory: coughing, wheezing, trouble breathing, nasal discharge (from inhalation)
- Neurologic (rare, with large exposures): lethargy, ataxia, tremors, seizures
- Hepatic: signs of liver injury can be delayed and include jaundice, lethargy, anorexia, increased liver enzymes on bloodwork
What to do if your cat eats cinnamon
If the exposure is only a tiny lick of a cinnamon‑flavored treat or a small seasoning spill, your cat will most likely be fine but watch for vomiting and respiratory signs. For any significant ingestion (tea, a spoonful, baking amounts), essential oil exposure, or inhalation with breathing difficulty, act immediately.Emergency response (prominent):
Practical feeding guidance and serving-size examples
- Rule: Do not intentionally feed cinnamon to your cat. It is not a necessary or beneficial addition to a feline diet.
- If you want to give a very tiny taste (e.g., a microscopic sprinkle of Ceylon cinnamon on homemade food), make sure it is Ceylon (very low coumarin), offer an amount smaller than a pinch, and monitor for GI upset — but even then, there is no nutritional need.
- Worst-case quantitation (illustrative only): because coumarin concentrations are highly variable and cats lack robust glucuronidation, even amounts under 1/10 of a teaspoon of Cassia could be concerning for a small cat. Do not attempt to calculate a “safe” dose for Cassia—avoid it.
Special situations
- Cats with pre-existing liver disease: much higher risk. Avoid any exposure and consult your veterinarian immediately if accidental exposure occurs.
- Kittens and senior cats: more fragile; treat any exposure seriously.
- Multi-ingredient human foods (spiced baked goods): may contain other fats, sugar, xylitol (a critical toxin), or raisins/garlic/onion—all of which can be hazardous. If your cat eats human baked goods, treat according to the most dangerous ingredient and seek veterinary advice.
Sources and further reading
- ASPCA Animal Poison Control: https://www.aspca.org/pet-care/animal-poison-control — phone (888) 426-4435
- American Veterinary Medical Association (AVMA) — resources on essential oil safety for pets: https://www.avma.org/
- Merck Veterinary Manual — toxicology and species differences in drug metabolism: https://www.merckvetmanual.com/
- Pet Poison Helpline — Cinnamon: https://www.petpoisonhelpline.com/poison/cinnamon/ (general guidance on spice exposures)
- European Food Safety Authority (EFSA) review on coumarin and cinnamomum species (for reference on coumarin levels in cinnamon types)
Key Takeaways
- CONDITIONAL: tiny amounts of Ceylon cinnamon are unlikely to harm a healthy cat, but avoid Cassia cinnamon, cinnamon essential oils, and inhaled powder.
- Cats are more vulnerable to certain plant compounds because they lack some liver glucuronidation enzymes (UGTs), increasing risk of accumulation and liver injury.
- There is no established “safe” coumarin intake for cats — err on the side of avoidance.
- If your cat has significant exposure, especially to cinnamon oil or breath/respiratory distress, call ASPCA Animal Poison Control at (888) 426-4435 or your vet immediately.
FAQ
Q: Is cinnamon-flavored cat food safe? A: Most commercial cat foods labeled “flavored” use small, regulated amounts of natural or artificial flavors. If cinnamon is listed and you’re concerned, check with the manufacturer and your veterinarian. Homemade spiced foods are riskier.
Q: Can I use cinnamon for flea control or home remedies on my cat? A: No. Topical application of cinnamon or essential oils can cause skin irritation, systemic toxicity, and worsen inhalation exposure. Use veterinarian-recommended flea products.
Q: My cat licked cinnamon off a plate — what should I do? A: For a tiny lick from a baked good, monitor your cat for vomiting, drooling, or breathing changes. If exposure was to Cassia in a larger amount, or if symptoms develop, call ASPCA Animal Poison Control or your vet.
Q: Is Ceylon cinnamon safe? A: Ceylon has much lower coumarin content and is less likely to cause coumarin-related liver injury, but because cats have metabolic vulnerabilities and there’s no nutritional benefit, it’s best avoided.
Reading time minutes: 6
citationSource: ASPCA Animal Poison Control citationUrl: https://www.aspca.org/pet-care/animal-poison-control
Frequently Asked Questions
Is cinnamon-flavored cat food safe?
Most commercial cat foods that list a 'flavor' use very small, regulated amounts of flavoring. If cinnamon is listed, check with the manufacturer and your vet; homemade spiced foods are riskier.
Can I use cinnamon for flea control or home remedies on my cat?
No. Topical cinnamon or essential oils can irritate and be systemically toxic. Use vet-recommended flea products instead.
My cat licked cinnamon off a plate — what should I do?
For a tiny lick, monitor for vomiting, drooling, or breathing changes. For larger exposures, essential oil contact, or any worrying symptoms, call ASPCA Animal Poison Control at (888) 426-4435 or your vet.
Is Ceylon cinnamon safe?
Ceylon cinnamon contains far less coumarin than Cassia and is less likely to cause coumarin-related liver injury, but because cats metabolize many compounds poorly and cinnamon offers no nutritional need, it’s best avoided.
References & Citations
Parts of this article reference data from ASPCA Animal Poison Control.