Final answer:
The active components that favorably affect cardiovascular health in both black tea and green tea are flavonoids, not quercetins, resverotrols, or sulforphones. Flavonoids improve heart health by enhancing endothelial function and reducing the risks of cardiovascular diseases.
Step-by-step explanation:
The active components in black tea and green tea associated with favorable effects on the cardiovascular system are flavonoids. The literature supports that diets rich in dietary fiber and plant polyphenols, which include flavonoids, can promote better coronary health. Flavonoids are a diverse group of plant compounds found in many fruits, vegetables, and beverages like tea, and they have been associated with lower risks of cardiovascular diseases. These compounds impact heart health by improving endothelial function, reducing inflammation, and lowering blood pressure and cholesterol levels.
Methyxanthines, such as caffeine, theophylline, and theobromine, are also present in teas but are not primarily responsible for the cardiovascular benefits. Caffeine, for example, is a stimulant which can have various pharmacological actions such as diuresis and stimulation of the central nervous system. However, its influence on cardiovascular health is not as significant as the effects of flavonoids on promoting heart health.
Overall, the consumption of black and green tea may contribute to stronger cardiovascular health due to their rich flavonoid content which is supportive of better coronary health, as recommended by the National Heart, Lung, and Blood Institute and the American Heart Association.