Dark Chocolate is jam packed with a ton of antioxidants like polyphenols, flavanols, & catechins. Flavanols are a special antioxidant that may improve brain function and verbal fluency via an increase of blood flow to the brain. 

To get the most health benefit from dark chocolate, aim for ones that are at least 70% dark. This ensures that you get more of the antioxidant properties of the flavanols.