Nutrition fuels the body for daily living and peak performance. When a person refines their nutrient intake, the potential for peak performance is in most cases heightened dramatically. The concept of chemical synergism comes into play. You will get more energy from the input than the sum of the individual foods would offer.

Michael Colgan, M. D. presented the keynote speech on Nutrition at the 1984 Olympic Scientific Congress that showed proper personalized nutrient intake improved marathon times an average of 11 minutes as compared with the placebo groups 7 minutes (this placebo effect illustrates the effect a person's mind has on performance), strength increased up to fifty percent, and for those who had been anywhere malnourished, I.Q. was enhanced by over 20 points.

Nutrition can affect the mind in positive or negative ways. The neuroendocrinologist, R. Wurtman showed in a study that complex-carbohydrates can have the same effect on people as anti – depressant drugs –– they can improve mood, diminish sensitivity to negative stimuli, and ease the way to sleep.