"Every choice you make from sleep patterns, to nutrition, to training, has an effect on the runner you are. Eat a lot of nutrient rich foods and notice how your body will start to give you all the energy you are asking of it."
-Deena Kastor, American Record Holder for the Marathon
Proper nutrition is an essential component for marathon training. Your training may be all for nothing if you don't get to the start line healthy because you haven't fueled your body properly in the weeks and months leading up to the race.
Note: This is a general plan. Individualized needs are based on resting metabolic rate, duration of running, intensity, body weight, and special requirements.