Here's why:
* Aesculin: Conkers contain a compound called aesculin, which is toxic to humans.
* Symptoms: Ingestion of conkers can cause symptoms like nausea, vomiting, diarrhea, abdominal pain, and even coma in severe cases.
* Not for consumption: Conkers are not meant to be eaten.
Important Note: While the conkers themselves are poisonous, the horse chestnut tree is not. The leaves and flowers are generally considered safe. However, it's always best to err on the side of caution and keep children and pets away from all parts of the tree.
If you suspect someone has ingested a horse chestnut conker, it is crucial to seek immediate medical attention.