Drinking two cups of hot chocolate a day may keep the brain healthy and prevent memory decline. Farzaneh A. Sorond and his team at of the American Academy of Neurology to investigate the effect of cocoa consumption on thinking and memory performance. In the study, 60 dementia-free older people of average age 73 to drink two cups of hot cocoa a day for 30 days. Half the participants drank hot cocoa high in antioxidant flavanol, while the other half drank flavanol-poor hot cocoa. Memory and thinking test conducted before and after using a set of standard tests , Using ultrasound measured neurovascular coupling. At the start of the study, 18 of the 60 participants had impaired neurovascular coupling. By the end of the study, it had improved by 8.3% and improved their scores on a working memory speed test. On the whole, There is a strong correlation between neurovascular coupling and cognitive function, and both can be improved by regular cocoa consumption in individuals with baseline impairments. Better neurovascular coupling is also associated with greater white matter structural integrity.