Toxicity

Cautions and safety

Jackfruit is a widely eaten fruit tree, but its sticky latex, rare allergies, heavy fruit and large size call for a few precautions.

• Sticky latex. ICRAF notes that every living part oozes a large amount of white, gummy latex when cut. Oil your hands and knife before cutting the fruit, and keep the latex away from your eyes (practical guidance).
• Allergy. Severe allergic reactions after eating jackfruit are rare and have been reported mostly in people who are already allergic to latex (Dey and colleagues, 2023). If you have a latex allergy, ask your doctor before eating jackfruit, and get medical help at once if anyone has swelling of the lips or tongue or trouble breathing after eating it.
• Pets. We found no reliable data on jackfruit for dogs or cats, and no ASPCA entry. Keep pets from chewing leaves, bark or seeds, and ask a vet if they do.
• Heavy fruit. The fruit grows on the trunk and thick branches and can weigh 4.5–50 kg (ICRAF). Harvest it before it ripens fully and falls, and keep children from playing under heavy ripe fruit (practical guidance).
• A big tree. Its wide crown and long taproot need space, so plant it away from walls, pipes and overhead wires.
• Wet feet, drought and frost. Avoid waterlogged soil, water young trees through dry spells, and protect them in cold northern winters.