We can't make our own vitamin C, so we need to imbibe enough of this essential nutrient through our diets . Through our bodies it flows, from the stomach, into the blood, and up to the brain. Past studies have hinted at how important vitamin C is to brain function. It concentrates in brain tissue , with the cerebrospinal fluid that bathes the brain containing twice as much vitamin C as blood. A decent vitamin C intake has also been linked to a lower risk of developing Alzheimer's disease. Now,