
The six classes of nutrients are water, vitamins, minerals, proteins, fats, and carbohydrates. We derive energy (fuel) from foods that contain carbohydrates, proteins, and fats. While vitamins and minerals are not a source of energy, they are needed to derive energy from the fuel foods. Water is a nutrient that literally ties everything together. Water circulates the other nutrients to the tissues where they are used and removes the by-products of this tissue utilization.
-Dan Benardot
"Nutrition for Serious Athletes"
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