The pyramid of health

Anglų referatai
Referatas
 5
Microsoft Word 32 KB
3 puslapiai

[pic]

[pic]

In this pyramid level are complex carbohydrates. Carbohydrates are
derived mainly from plants, including foods such as fruits, vegetables,
pasta, rice, legumes (beans), and other grains fall in this category.
Carbohydrates are very important to the body since they are the primary
source of energy. Some body tissues, such as red blood cells and most parts
of the brain, can only use carbohydrate (glucose) for energy. You should
eat 6-11 servings of carbohydrates each day, comprising 55-65% of your
diet.
Carbohydrates are broken down by the body into glucose, which is a
form of sugar that is carried in the blood and transferred to cells for
energy. Some carbohydrates, such as pasta and bread, have been labeled
fattening. This, however, can be said of all foods, no matter their
nutritional makeup. When a person consumes too many calories, the excess
will be stored as body fat, whether the foods were carbohydrates, proteins,
or fats.
Complex carbohydrates are long chains of glucose molecules. They are
usually comprised of starches, which is the product of carbohydrate storage
in plants. The major source of complex carbohydrates are whole grain
products, such as whole wheat bread, brown rice, pasta, and beans.

[pic]

In fruits and vegetables are a lot of vitamins. The chemical
structures of the vitamins are all known, and all of them have been
synthesized; the vitamins in foods are identical to the synthetic ones. A
well-balanced diet usually satisfies the minimum vitamin requirements of
human beings. The Recommended Dietary Allowance (RDA) of each vitamin is
the standard guideline put forward by the Food and Nutrition Board,
National Academy of Sciences-National Research Council. It is based on the
nutritional needs of an average, healthy person. Different amounts may be
recommended for children, older people, lactating mothers, or people
dealing with an ongoing disease process.
   Vitamins were originally classified according to their solubility in
water or fats, and as more and more were discovered they were also
classified alphabetically. The fat-soluble vitamins are A, D, E, and K; the
B complex and C...