1. Enhances Brain Function. Yup, it’s true - a small dose of dark chocolate may help you think better. Dark chocolate is naturally rich in the stimulants caffeine and theobromine, two compounds that can add a short term boost to overall brain function. Theobromine has been found to improve focus, concentration and visual processing of information. Dark chocolate may also improve blood flow to the brain. 2. Rich in Antioxidants including Polyphenols, Flavanols, and Catechins.