Apple seeds can release cyanide—but how much is actually dangerous?

Apple seeds contain a compound that can release cyanide when digested. While eating a few by accident is unlikely to cause harm, consuming large amounts may lead to poisoning. Experts warn that children face higher risks due to their smaller size and lower tolerance.

The danger comes from amygdalin, a substance found in apple seeds. When chewed or crushed, it breaks down into hydrogen cyanide, a toxic chemical. Swallowing seeds whole reduces the risk, as they pass through the body mostly intact.

A child weighing 30 kg would need to eat around 150 to 300 whole seeds in a short time to reach a potentially lethal dose. For adults, toxic levels would require consuming seeds from roughly 50 apples at once. Symptoms of poisoning include abdominal pain, dizziness, nausea, vomiting, and headaches.

Regularly drinking pressed juice or smoothies with whole apples could also pose a risk over time, particularly for vulnerable individuals. Severe cases are rare but possible if large quantities are consumed quickly. Those worried about accidental ingestion can contact Poison Control on 800-222-1222 or seek medical help if symptoms appear.

While apple seeds are poisonous, eating a few is generally safe for most people. The real danger lies in consuming them in large amounts or over long periods. Parents and caregivers should be especially cautious with children, who are more at risk due to their size and behavior.