The foods we eat contain thousands of different chemicals. However, only a few dozen of these chemicals are absolutely essential to keep us healthy. These few dozen are the nutrients--the substances we must obtain from the foods we consume.Nutritionists classify nutrients into six main groups:
(1) water,
(2) carbohydrates,
(3) fats,
(4) proteins,
(5) minerals, and
(6) vitamins.
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