Cherry seeds do contain a compound that converts to cyanide in your body, but the risk depends almost entirely on whether the pit is crushed or swallowed whole. An intact cherry pit will pass straight through your digestive system without releasing any toxins. Crushed or chewed pits are a different story, though accidental poisoning from cherries is still rare.
What’s Inside a Cherry Pit
The kernel inside a cherry pit contains a compound called amygdalin. When that kernel is crushed, chewed, or otherwise broken open, your body converts amygdalin into hydrogen cyanide. This conversion happens in the small intestine, where enzymes and gut bacteria break amygdalin down into several byproducts, including cyanide gas.
The amount of amygdalin varies by cherry type. Red cherry seeds contain roughly 3.9 mg of amygdalin per gram of seed, while black cherry seeds contain about 2.7 mg per gram. These concentrations are meaningful: the average fatal dose of ingested cyanide for an adult is estimated at 1.52 mg per kilogram of body weight, with doses as low as 0.52 mg/kg potentially being lethal in some cases. For a 70 kg (154 lb) adult, that puts the lower end of a fatal cyanide dose around 36 mg.
That said, amygdalin doesn’t convert to cyanide on a 1:1 basis. Only a fraction of the amygdalin’s weight ends up as hydrogen cyanide after digestion. Still, enough crushed cherry pits eaten at once could theoretically deliver a dangerous dose, particularly for children, who weigh less and are more vulnerable.
Whole Pits vs. Crushed Pits
This distinction is the most important thing to understand. Cherry pits have a hard outer shell that your teeth can barely crack, and your stomach acid won’t dissolve it either. If you accidentally swallow a whole cherry pit, it travels through your digestive tract intact and comes out the other end. No amygdalin is released, and no cyanide is produced. Cherry pit ingestions are one of the most common reasons people call poison control centers, and the answer is almost always the same: you’ll be fine.
The danger only exists when the hard shell is broken and the soft kernel inside is exposed. Crushing, grinding, or thoroughly chewing a pit before swallowing it allows the amygdalin to come into contact with digestive enzymes and gut bacteria that produce cyanide. Even then, swallowing a small amount of crushed pit material from a single cherry is unlikely to cause serious harm in an adult. The concern grows with quantity.
Symptoms of Cyanide Exposure
At low doses, cyanide from crushed cherry pits causes headache, dizziness, mild confusion, nausea, vomiting, and abdominal cramps. These symptoms can appear within 30 minutes to a few hours after ingestion, depending on how much was consumed and whether food was also in the stomach.
At higher doses, the situation becomes serious. Large exposures can cause difficulty breathing, dangerously low blood pressure, irregular heartbeat, seizures, and loss of consciousness. Cyanide works by blocking cells from using oxygen, so the body essentially suffocates at a cellular level even though the lungs are still taking in air. Fatal outcomes from cherry pits specifically are extremely uncommon, but they are biologically possible if someone were to deliberately consume a large quantity of crushed kernels.
Other Stone Fruits Carry the Same Risk
Cherries aren’t unique here. Apricots, peaches, plums, and nectarines all belong to the same plant family, and their pits all contain amygdalin. Apricot kernels tend to get the most attention because they’re sometimes sold as a food product or marketed as a health supplement (often under the name “vitamin B17,” which is not a real vitamin). Of the common stone fruits, apricot kernels generally contain the highest concentrations of amygdalin. Apple seeds also contain it, though in smaller amounts per seed.
The same rule applies across all these fruits: the intact pit is harmless. The crushed kernel is where the risk lives.
Does Cooking Destroy the Toxin?
Heat can reduce amygdalin content to some degree, but the process is not straightforward. Boiling or roasting may partially break down the compound or deactivate the enzymes within the seed that help release cyanide. However, your body produces its own enzymes and harbors gut bacteria capable of completing the conversion independently. So even if the plant’s own enzymes are destroyed by heat, your digestive system can still process any remaining amygdalin into cyanide. Cooking should not be treated as a reliable way to make crushed cherry pits safe to eat.
What to Do If You Swallow a Pit
If you swallowed a whole, intact cherry pit, no action is needed. It will pass naturally, usually within a day or two. This is true for adults and children alike, though very young children who swallow multiple pits could theoretically face a choking or obstruction risk unrelated to cyanide.
If someone has chewed or crushed multiple cherry pits and swallowed the fragments, watch for symptoms like nausea, headache, or dizziness. Contact your local poison control center (in the U.S., the number is 1-800-222-1222) for guidance specific to the amount consumed and the person’s size. For children, even small amounts of crushed kernels warrant a call, since their lower body weight means a smaller dose can be significant.