Chocolate's high caffeine content stimulates your circulation, allowing your blood to naturally rejuvenate and heal your skin. Antioxidants also give your skin a plumper, firmer feel and help your cells build collagen and elastin.
It is great for your heart and circulatory system as it contains flavonoids, which are beneficial chemicals found in plants. Flavonoids help platelets stay away from the walls of blood vessels, reducing the risk of artery clogs and therefore making you less prone to a heart attack or stroke. The flavonoids found in chocolate also help blood vessels relax, thus regulating blood pressure.