Is Ginkgo Poisonous? – Seed and Fruit Toxicity for Pets and People

Ginkgo is toxic in specific parts. The seeds and the fleshy outer pulp of the female tree’s fruit can cause serious poisoning in dogs, cats, and people. The rest of the tree, including the leaves used in commercial supplements, is a different story. Knowing which part of the plant is dangerous makes all the difference.

A Note on the Two Very Different Uses of Ginkgo

There is widespread confusion about ginkgo because the plant has two completely separate identities. The ginkgo leaf extract sold in supplement form has been studied extensively and is broadly considered safe at typical doses. The raw seed (called ginkgo nut, used in East Asian cooking) and the fleshy fruit pulp that coats the seed are a different matter: both contain compounds that are toxic to animals and humans, and the fruit pulp is also a potent contact irritant.

This page covers the whole plant. If your concern is a pet or child who has eaten seeds or come into contact with the fleshy fruit, act now.

What Parts of Ginkgo Are Toxic?

The fleshy outer fruit coat (mesocarp): The pulp surrounding ginkgo seeds contains ginkgolic acids, compounds chemically similar to urushiol (the substance that makes poison ivy cause rashes). Handling this pulp can cause skin irritation, blistering, and allergic reactions. Ingestion causes burning in the mouth and GI tract.

Raw seeds (ginkgo nuts): The seeds contain 4-methoxypyridoxine (also called MPN or ginkgotoxin), which antagonizes vitamin B6 in the body. High enough exposure disrupts nerve function and can trigger seizures. This compound is reduced but not eliminated by cooking; raw seeds are the highest-risk form.

The leaves: Fresh leaves contain low levels of ginkgolic acids. The standardized extracts used in supplements remove most of these. Casual contact with a fallen leaf is not a significant risk.

Symptoms of Ginkgo Poisoning

Dogs and cats: Vomiting, irritability, and in more serious cases, seizures. Dogs are particularly susceptible to ginkgotoxin from seeds. The fleshy fruit pulp can cause skin irritation around the mouth and paws if a dog walks through fallen fruit and licks its paws.

Humans and children: Contact with the fruit pulp can cause a rash or blistering similar to poison ivy, especially in people with nut allergies. Eating large quantities of raw seeds can cause nausea, vomiting, and in severe cases seizures. Children are at higher risk than adults because their smaller body mass means a given dose hits harder. In traditional use, ginkgo nuts are eaten cooked and in small quantities; raw or in large amounts they are a genuine risk.

What to Do If a Pet or Person Is Exposed

1. If skin or paw contact with fruit pulp occurred, wash the affected area thoroughly with soap and water.
2. If seeds or fruit pulp were eaten, remove any remaining plant material from the mouth.
3. Rinse the mouth with water.
4. Call poison control at 1-800-222-1222 (US) or your vet immediately. Do not wait for symptoms to develop.
5. If seizures occur, call 911 or go to the emergency room immediately.
6. Do not induce vomiting unless a medical professional directs you to.

Safe Handling Around a Ginkgo Tree

Ginkgo trees are common street and park trees. Male trees produce no fruit and are essentially safe. Female trees drop fleshy seeds in autumn that smell strongly of rancid butter (butyric acid). This is the period of highest risk for pets and children.

Practical steps:

• Keep dogs on a leash near female ginkgo trees in autumn when fruit is falling.
• Wash your dog’s paws after walks near ginkgo trees during seed-drop season.
• Wear disposable gloves if you handle fallen ginkgo fruit.
• Do not let children pick up or eat ginkgo seeds from the ground.
• Wash hands after touching any part of the fleshy fruit.

Ginkgo Supplements and Pets

The ginkgo leaf extract in over-the-counter supplements has been investigated as a feed additive for dogs, cats, and horses. European food safety panels have raised concerns about potential carcinogenicity at high doses from some extract preparations. This is a separate question from acute seed poisoning, but it means ginkgo supplements should only be given to animals under veterinary guidance, not as a home remedy.

Frequently Asked Questions

Are all ginkgo trees dangerous? Only female trees produce the fruit. Male trees, which are more commonly planted as street trees, do not produce seeds or fruit and pose no significant risk.

Can my dog eat ginkgo nuts? No. Raw ginkgo seeds can cause vomiting, irritability, and seizures in dogs. Cooked seeds are safer for humans in small amounts but should not be given to pets.

I touched a ginkgo fruit and my hands are itching. What should I do? Wash your hands thoroughly with soap and water. The ginkgolic acids in the fruit pulp act like urushiol from poison ivy and can cause contact dermatitis. If the rash is severe or spreading, contact a doctor.

Are ginkgo supplements safe for my pet? Do not give ginkgo supplements to pets without veterinary guidance. The regulatory status and safety profile of these products for animals is still being evaluated.

What does ginkgo fruit smell like? Fallen ginkgo fruit smells strongly of vomit or rancid cheese (butyric acid). If you notice this smell near a ginkgo tree in autumn, be aware that fruit is on the ground and keep pets away.