Now before you go off collecting kindling to burn me for being a witch let’s have a look at how vitamin C can be considered brain food. The highest concentration of vitamin C in the body is found in the adrenal glands because it is required to make cortisol and adrenalin for conditions of stress. But the next highest concentration is found in the brain. Why would the brain require vitamin C? So the body may produce dopamine, serotonin and melatonin. Vitamin C helps to keep your sanity as well as your collagen intake.