Nutrients
        Substances the body needs to…
          regulate body functions
          repair body tissues
          promote growth                   d 
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                                       f      to
            obtain energy           k o     sy 
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        Most nutrients come from the food we 
          eat.
        Common Analogy
       The body is like a high-performance race 
         car.
       Food is like fuel. 
       The body (car) needs high quality food 
         (fuel) to keep it running its best.  
          Unfortunately, there are serious 
        problems with this overly-simplified 
                      analogy.
       Classes of Nutrients
                           MACRONUTRIENTS
    Carbohydrates
    Proteins
    Fats
    Water             PROVIDE 
                       ENERGY
    Vitamins
    Minerals                     MICRONUTRIENTS
                      DO NOT PROVIDE 
                      ENERGY
      Calorie
      Energy from food
      Equals the amount of 
       energy needed to raise a 
       liter of water by one degree 
       Celsius
      The chemical process by 
       which the body breaks down 
       food to release energy 
       (Calories) is called 
       metabolism.
     Energy Content
     Trick Question: How many calories per gram 
     are there in water, vitamins, and minerals?