Fruits are stocked with A and C vitamins, some B's and E's as well as minerals like calcium, magnesium, copper and trace minerals. All needed for proper brain function and health. Oranges are also high in potassium and contain most vitamins and minerals in moderate amounts, they are high in C and A and can help fight infection in the body. Apricots are very nutritious and is one of the longevity foods consumed in high amounts by the long living Hunzas people. Vegetables are building.
Greens help build the blood and keeps the blood alkaline for more oxygen.
Protein will give you longer lasting energy. It may be wise to have a protein shakes during race day which do not require as much energy to burn. If you choose to eat your protein, eat smaller amounts a few times during the day rather than big portions which can drag you down for a while. Eating healthy has all the benefits, feeling good, alert, strong, energetic and balanced. You may need to introduce these foods in slowly if your body in not used to them.