Coffee is a major source of antioxidant polyphenols in the Japanese diet [27]. As shown in Table 1, coffee has the highest total polyphenol content in beverages, followed by green tea.
The bottom line Chocolate with over 70% cocoa packs the best punch for your health, but enjoy it in small amounts: 100 g of dark chocolate has 500 calories! Unsweetened chocolate is 100% cocoa.