Why does eucalyptus taste bad?

Eucalyptus leaves contain compounds like eucalyptol and tannins, which can produce a strong, medicinal flavor that many find unpalatable. These compounds are part of the plant's defense mechanism against herbivores, making it less appealing for consumption. Additionally, the high concentration of essential oils can create a pungent taste that overwhelms more delicate flavors. As a result, eucalyptus is often considered too intense or bitter for most people's tastes.