Flavan-3-ol

Flavan-3-ols (sometimes referred to as flavanols) are a subgroup of flavonoids. They are derivatives of flavans, are structurally diverse, and include compounds such as catechins (e.g. epigallocatechin gallate), epicatechin gallate, proanthocyanidins, theaflavins, and thearubigins.

Present in tea leaves, berries, apples, cocoa beans, and grapes, they participate in diverse plant functions, including regulation of cell growth, attraction of pollinating insects, and defense against environmental stress.