Chocoholics are the smartest people around. Or at least they should be, thanks to the flavanol content of the snack. Teamed with reports that it also helps to improve blood flow to the brain, it appears that dark chocolate makes excellent brain food. So much so, that researchers have even put its properties to the test with Alzheimer's patients. In a trial published by Nature Neuroscience, it was discovered that “high-flavanol intervention was found to enhance dentate gyrus (DG) function” - DG being the region of the brain in which “function declines in association with human aging.” Although the study explains, while the flavanols have the potential to perhaps aid those with Alzheimer's, it can’t prevent the disease entirely.