Epicatechin is a monomeric flavanol and a key member of the flavonoid class of polyphenols abundant in cocoa, green tea, apples, and grapes. It exhibits potent antioxidant activity by scavenging free radicals and chelating metal ions, contributing to reduced oxidative stress. In food science, epicatechin influences flavor, color stability, and health-promoting properties including improved endothelial function, blood pressure regulation, and anti-inflammatory effects. It is absorbed in the small intestine and metabolized into various conjugates. Research from peer-reviewed studies links dietary intake to cardiovascular benefits and potential neuroprotective roles. As a natural food constituent, it is stable under typical processing conditions but can undergo oxidation or polymerization during heating or storage.