• Nutrients are substances the body needs for energy, building materials, and control of body processes.
  • There are six main classes of nutrients: carbohydrates, proteins, lipids, water, vitamins, and minerals.
  • The exact amount of each macronutrient that an individual needs depends on many factors, including gender and age.
  • People who do not eat enough of the right foods may need vitamin or mineral supplements.
  • Good sources of minerals include leafy vegetables, whole grains, milk, and eggs.
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