Cinnamon Toxic?

Updated 2026-03-06| 3 min read| 1,552 found this helpful

Cinnamomum zeylanicum

Cinnamon is classified as non-toxic to cats, dogs, and horses per official plant toxicology data

Only extremely large, non-typical volumes of cinnamon may cause mild, transient gastrointestinal upset in all species

No severe, life-threatening toxic reactions are linked to incidental exposure to this plant

FAQ

Is Cinnamon toxic to Humans?

Small culinary intake is safe; very large doses may cause mild mouth irritation, stomach cramps, or loose stools (Non-toxic)

Is Cinnamon toxic to Cats?

No toxic symptoms expected from normal exposure; excessive intake may cause mild vomiting or diarrhea (Non-toxic)

Is Cinnamon toxic to Dogs?

No toxic symptoms expected from normal exposure; excessive intake may cause mild digestive discomfort or loose stools (Non-toxic)

Is Cinnamon toxic to Horses?

No documented toxic effects from standard dietary exposure; very large doses may lead to transient loose manure (Non-toxic)

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Toxicity Details

Humans

Non-toxic

Small culinary intake is safe; very large doses may cause mild mouth irritation, stomach cramps, or loose stools

Cats

Non-toxic

No toxic symptoms expected from normal exposure; excessive intake may cause mild vomiting or diarrhea

Dogs

Non-toxic

No toxic symptoms expected from normal exposure; excessive intake may cause mild digestive discomfort or loose stools

Horses

Non-toxic

No documented toxic effects from standard dietary exposure; very large doses may lead to transient loose manure

Toxicity Snapshot

Toxic PartsNo toxic parts identified for typical consumption; the commonly harvested inner bark is non-toxic in small amounts

Exposure RouteOral ingestion is the primary exposure route; dermal contact has no documented toxic effects

Toxic CompoundsCinnamaldehyde; Eugenol; Low-concentration coumarin; Cinnamic acid

First Aid & Prevention

First 30 Minutes

• Rinse the mouth of the exposed animal with clean water if they show signs of mouth or throat irritation
• Offer small sips of fresh water to dilute any ingested cinnamon in the digestive tract
• Monitor the animal for 2 to 4 hours for signs of mild gastrointestinal discomfort

Contact Vet Immediately

• If the animal experiences persistent vomiting or diarrhea lasting more than 6 hours post-exposure
• If the animal shows rare signs of allergic reaction including facial swelling, hives, or breathing difficulty
• If the ingested amount exceeds 1 tablespoon per 10 pounds of body weight for small companion animals

Prevention

• Store large quantities of cinnamon powder or sticks out of reach of pets and young children
• Avoid intentionally feeding large amounts of cinnamon to companion animals or livestock
• Check treat and food ingredient lists if your animal has known sensitivities to spice compounds

Treatment & Prognosis

• Administer supportive care including fluid therapy to address dehydration from GI upset if needed
• Prescribe antiemetics to control persistent vomiting in sensitive individuals under veterinary guidance
• Administer antihistamines for rare allergic reactions per a veterinarian’s recommendation

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Professional Toxicology

Scientific NameCinnamomum zeylanicum

AliasesCeylon Cinnamon、True Cinnamon

Toxicity Grade

HumansNon-toxic

CatsNon-toxic

DogsNon-toxic

HorsesNon-toxic

Target Organs

No target organ damage expected with normal exposure; gastrointestinal mucosa may be irritated by extremely high doses

Mechanism of Action

• No toxic mechanism is activated at typical exposure levels

• Very high concentrations of cinnamaldehyde may cause mild irritation to mucous membranes in the digestive tract

Other Species Risk (CliniTox)

Information from CliniTox veterinary text.

Cattle: Non-toxic in incidental small doses; very large intake may cause mild rumen discomfort

Sheep: Non-toxic in small amounts; excessive consumption may lead to transient digestive upset

Small companion mammals (rabbits, guinea pigs): Non-toxic in tiny culinary amounts; large doses may trigger gastrointestinal stasis in sensitive individuals

Confusion Risk

The following plants look similar and may be confused:

Cassia Cinnamon Cinnamomum cassia

Often sold interchangeably with Ceylon cinnamon as generic 'cinnamon'; Cassia has much higher coumarin content, which carries higher adverse effect risk with regular large dose intake

Bay Laurel Laurus nobilis

Belongs to the same Lauraceae family, has a similar aromatic scent; dried bay laurel leaves are used in cooking, and are also low-risk unless consumed in very large quantities

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Related Toxic Plants

Camphor Tree

Cinnamomum camphora

Highly toxic, ingestion of camphor extracts may cause seizures and organ damage

Sassafras

Sassafras albidum

Moderately toxic, contains carcinogenic safrole that causes adverse effects at high doses

California Bay Laurel

Umbellularia californica

Low to moderate toxicity, large doses cause digestive upset and mild neurological symptoms

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Data Sources

1. ASPCA Animal Poison Control

This information is for reference only and does not constitute medical advice. If ingestion or poisoning is suspected, seek medical or veterinary attention immediately.

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