Dark chocolate and red wine contain beneficial flavonoids like catechins, epicatechins, and procyanidins that can improve heart health and reduce cancer risk. Catechins are powerful antioxidants found in high amounts in cocoa and act to improve blood flow and reduce body fat, while epicatechins help heart health. Quercetin, a flavonol found in wine, helps reduce allergies, asthma, and hypertension and maintains blood vessel health through its antioxidant effects. Drinking 196ml of red wine per day can significantly reduce atherosclerosis risk in adults.