Apple seeds have the potential to release 0.6 mg of hydrogen cyanide per gram. This means that a person would have to eat 83–500 apple seeds to develop acute cyanide poisoning. In other words, consuming cups of ground apple seeds might be fatal, or at least cause illness.
How many seeds of apple can cause death?
You would need to finely chew and eat about 200 apple seeds, or about 40 apple cores, to receive a fatal dose. The Agency for Toxic Substances & Disease Registry (ATSDR) says that exposure to even small amounts of cyanide can be dangerous. Cyanide can harm the heart and brain, and even lead to coma and death.
How many apple seeds will kill an animal?
In fact, a 10 kg dog (Cavoodle size) would need to eat around 1000 seeds to be poisoned. And with a standard apple containing about 10 seeds, that's around 100 apples. For a Labrador, that increases to around 300 apples in order to have problems.
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