With caution — cats and cinnamon
Ground cinnamon in very small amounts (a pinch accidentally ingested) is not an emergency for most cats. The hazards scale with concentration and form: cinnamon essential oil is directly irritating and potentially hepatotoxic; cassia cinnamon (the common supermarket type) contains coumarin which affects blood clotting and liver function with repeated exposure; inhaled cinnamon powder irritates the respiratory mucosa. Not a deliberate treat — but not a call-the-helpline situation for trace accidental contact with ground powder.
🏆 Pet Care Community Safety Score™ — Cinnamon for Cats
"Cinnamon is not acutely dangerous from trace contact, but it sits in the 'not appropriate and potentially cumulative' category. The coumarin content in cassia cinnamon — which is the product sold in Australian supermarkets as 'cinnamon' — has documented hepatotoxic effects in rodent models and is associated with liver enzyme elevation in humans who consume very large amounts daily. For cats, whose liver glucuronidation capacity is already limited compared to other species, I am cautious about any repeated essential oil or coumarin exposure. Essential oil diffusers running cinnamon oil in a home with cats are a specific concern I raise regularly."
The straight answer
A trace amount of ground cinnamon — the amount a cat might lick off a baking tray or countertop — is not an emergency. Cinnamon is not in the same danger category as garlic, grapes, or xylitol. What changes the risk profile is the form and the amount: cinnamon essential oil is directly harmful to cats, powdered cinnamon in significant quantities causes oral and GI irritation, and the coumarin content of cassia cinnamon (what Australian supermarkets sell as "cinnamon") is a concern with repeated exposure.
Two types of cinnamon — and why it matters
When Australians buy "cinnamon" from Coles or Woolworths, they are almost always buying cassia cinnamon (Cinnamomum cassia), not true Ceylon cinnamon (Cinnamomum verum). The distinction matters because cassia cinnamon contains significantly higher levels of coumarin — a naturally occurring compound that is anticoagulant and hepatotoxic at meaningful doses.
| Type | Coumarin content | Availability in Australia |
|---|---|---|
| Cassia cinnamon | ~2,100–4,400mg/kg | Standard supermarket product |
| Ceylon cinnamon | ~17mg/kg | Health food stores; labelled "true cinnamon" |
For cats — with their reduced capacity for hepatic phase II metabolism — the coumarin concern is amplified. A cat repeatedly exposed to cassia cinnamon through food, treats, or a cinnamon-scented household environment is receiving cumulative coumarin exposure that warrants more caution than the "non-toxic" label suggests.
Cinnamon essential oil — the serious form
Cinnamon bark oil and cinnamon leaf oil are concentrated extracts with cinnamaldehyde and eugenol as primary components. These cause direct irritation to feline mucous membranes and, at higher exposures, liver stress through the same impaired glucuronidation pathway that makes many aromatic compounds problematic for cats.
The practical exposure routes in Australian homes: - Aromatherapy diffusers running cinnamon oil in a shared space with cats — inhalation and surface deposition on fur (then ingested through grooming) - Cinnamon oil-based cleaning products — applied to surfaces cats walk on - Cinnamon oil in craft or baking projects — open bottles accessible to curious cats - "Natural" flea repellent sprays containing cinnamon oil — do not use these on cats
If a cat was in a room with an active cinnamon oil diffuser for an extended period, or had direct skin contact with cinnamon oil, call the Animal Poisons Helpline on 1300 869 738.
Ground powder — the practical everyday exposure
Most cinnamon exposure for cats is from ground powder: a cat licking a cutting board where cinnamon was used, accessing a spice jar, or eating a piece of cinnamon-containing baked good.
The cinnamaldehyde in ground powder is a mucous membrane irritant at significant doses. A cat that licks a small amount from a surface may drool briefly and show oral discomfort. A cat that ate a meaningful amount of raw ground cinnamon (e.g., got into an open spice jar) will vomit. Both scenarios are unpleasant but typically self-limiting in healthy adult cats.
What to watch for: drooling, vomiting, coughing, pawing at the mouth. These are irritation responses and resolve without specific treatment in most cases. If symptoms persist beyond 1–2 hours or are severe, call your vet.
Cinnamon in baked goods — the context issue
Cats sometimes access cinnamon through baked goods: cinnamon scrolls, apple and cinnamon muffins, snickerdoodle biscuits. In these contexts, the cinnamon content per serving is low — typically 1–3g of cinnamon in a whole batch, tiny fraction in each serve. The cinnamon is usually not the primary concern; the butter, sugar, raisins (if present), and any xylitol sweetener are more immediately relevant.
Always check the full ingredient list of any baked good a cat accessed — the cinnamon is usually the least of your worries.
🚨 My Cat Ate Cinnamon — What Now?
If your cat was directly exposed to cinnamon essential oil (from a diffuser, topical product, or spill), call the Animal Poisons Helpline on 1300 869 738. Essential oil exposure in cats is more serious than powder exposure. For ground powder, monitor for drooling and respiratory irritation.
Signs that warrant a vet call:
- Respiratory irritation (coughing
- sneezing) if inhaled. Oral and GI mucosa irritation (drooling
- vomiting) from direct contact with cinnamon oil or large amounts of powder. With cinnamon essential oil exposure: more significant GI and possible liver effects
If your cat ate a large amount or is showing the signs above: Don't wait — call immediately.
📞 Animal Poisons Helpline: 1300 869 738Available 24/7 across Australia. Have your cat's weight, breed and approximate quantity consumed ready when you call.
Frequently Asked Questions
Cats generally dislike the smell of cinnamon, and some people use it as a deterrent on furniture or in garden beds. As a topical deterrent on surfaces the cat won't eat, trace amounts are not a health concern. Do not apply cinnamon oil directly to any surface a cat will walk on and then lick from its paws.
For a guide to household herbs and seasonings that are and aren't safe for cats, see our cat food safety hub and our basil guide for a contrasting non-toxic herb case study.
📚 Sources & Further Reading
- ASPCA Animal Poison Control — Cinnamon and Essential Oils. https://www.aspca.org/pet-care/animal-poison-control
- Gruenwald J, et al. Cinnamon and health. Critical Reviews in Food Science and Nutrition 2010.
- Cornell Feline Health Center — Essential Oil Toxicity. https://www.vet.cornell.edu
- Australian Veterinary Association — Household Toxins. https://www.ava.com.au
