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Nutrition for Life: The food we eat


Nutrition for Life: The food we eat What is Nutrition? Nutrition is the science or study of food & the way the body uses it Nutrients are substances in food that ... – PowerPoint PPT presentation

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Title: Nutrition for Life: The food we eat

Nutrition for Life The food we eat
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What is Nutrition?
  • Nutrition is the science or study of food the
    way the body uses it
  • Nutrients are substances in food that provide
    energy, help form and maintain body tissues and
    are essential for growth.
  • 6 classes of Nutrients
  • Carbohydrates Fats
  • Proteins Vitamins
  • Minerals Water

What is Nutrition continued
  • Metabolism is the sum of the chemical processes
    that take place in your body to keep you alive
    and active.
  • Metabolism requires energy from carbohydrates,
    fats, and proteins and is measured in calories.
  • Carbohydrates are energy-giving nutrients that
    include sugars, starches, and fiber.
  • Fats are the main form of energy storage in the
  • Proteins are made of amino acids, which build and
    repair structures and regulate processes in the

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Carbohydrates are the bodies main source of
energy-giving nutrients that include sugars,
starches, and fiber.
  • There are two kinds of Carbohydrates Simple and
  • Simple Carbohydrates are made up of single or
    double sugar molecules.
  • Sugars are the simplest form of carbohydrates.
    They include fruits, vegetables, and milk.
  • Complex Carbohydrates are many sugar molecules
    that are linked together such as starches,
    glycogen, and fiber.

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Fiber What is it?
  • Fiber is not an essential nutrient.
  • It is a complex carbohydrate that provides little
    energy and cannot be digested.
  • It helps push foods through the digestive system.
    (Helps cleanse the body.)
  • Examples include
  • Fruits, vegetables, whole grains, and beans

Fats are the bodys main form of long-term
energy storage.
  • Fats are important for your body to function
  • They dissolve certain vitamins, help make blood
    clots, aids in the formation of hormones, cushion
    bones and vital organs, and makes you feel
    satisfied after eating.
  • Fats are classified by the types of fatty acids
    they contain, either unsaturated or saturated.

The Good Fat Unsaturated
  • Unsaturated fats are usually liquid at room
  • They do not raise blood cholesterol levels.
  • They come mostly from plants.
  • They are classified as the following and believed
    to help lower the risk of heart disease
  • Monounsaturated fats consists of olive, peanut,
    and canola oils
  • Polyunsaturated fats are in safflower, soybean,
    and corn oils.
  • Omega-3 Fatty Acids come in the highly
    recommended fish, green leafy vegetables, nuts,
    tofu, and canola oil

The Bad Fat Saturated
  • Saturated fats are usually solid at room
  • They come from fats found in meat, lard, dairy
    products such as butter, cheese, ice cream, and
    milk, as well as palm and coconut oil.
  • Eating too many saturated fats can lead to
    obesity, high cholesterol levels, and increased
    risk of heart disease.

The Ugly Trans Fats
  • Create from vegetables oils during the
    hydrogenation process turning them from liquid to
    a more solid form.
  • Examples include margarine, shortening, cookies,
    cakes, TV dinners, candy bars, deep-fried french
    fries and crackers.
  • Trans fats are used in many processed foods to
    enhance shelf life and flavor.
  • They can cause heart disease if intake is not
    monitored. Since 2006, all food labels MUST
    include quantity of trans fats. (Look for
    hydrogenated or partially hydrogenated)

Cholesterol a lipid found in all human and
animal tissues
  • Your body makes cholesterol, as well as gets it
    from meat, eggs, and dairy products.
  • Cholesterol is necessary for certain essential
    functions in the body.
  • Needed to make Vitamin D, cell membranes,
    hormones, and bile
  • There are two types
  • HDL (Good cholesterol) carries cholesterol back
    to the liver where it is removed from the blood
  • LDL (Bad cholesterol) brings cholesterol to
    cells, when levels get too high in the blood,
    plaque forms on blood vessel walls which block
    blood flow to the heart, increase the risk of a
    heart attack

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Protein are made of amino acids, which are used
in building and repairing structures in the body.
  • Muscles, skin, hair, and nails are made up mostly
    of protein.
  • Proteins are also needed for hormones, enzymes,
    and other essential molecules.
  • 20 different amino acids make up body proteins.
    Nine cannot be made in our bodies. These are
    called essential amino acids and must be eaten un
    your diet to meet your bodys needs.

Proteins Continued
  • Protein from our diets come from both animal and
    plant foods.
  • Animal proteins such as meat, eggs, and dairy
    products contain all the essential amino acids
    and are called complete proteins.
  • Most plant proteins like legumes, whole grains,
    and vegetables dont have all the essential amino
    acids needed by our body are called incomplete
  • A healthy diet must include all the essential
    amino acids. A diet that contains both plant and
    animal food can easily meet all your amino acid

Vitamins are carbon-containing nutrients that
are needed in small amounts to maintain health
and allow growth.
  • Vitamins are classified by what they dissolve in
    fat or water.
  • Fat-soluble vitamins dissolve in fat. As a
    result, they can be stored in fat tissue and
    remain in the body for a long time. Examples
    include Vitamins A, D, E, and K.
  • Water-soluble vitamins dissolve in water. They
    are not stored in the body very well. Such
    vitamins are the 8 B vitamins and vitamin C.

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Minerals are chemical elements that are
essential in small amounts to maintain good
  • Nutrient deficiency is the state of not having
    enough of a nutrient to maintain good health.
  • A well-balanced diet can meet ALL vitamin and
    mineral needs.

Minerals continued
  • Three Important Minerals
  • Sodium
  • Most of us eat more sodium than is healthy.
  • Too much can lead to high blood pressure
    resulting in heart disease, stroke, or kidney
  • Calcium
  • Most teens do not eat enough calcium. Calcium is
    found in green, leafy vegetables (broccoli and
    spinach) and in calcium-fortified foods (bread
    and orange juice.
  • Mostly found in your bones, which form between 9
    and 17 years old.
  • Iron
  • Iron-deficiency is a worldwide problem that
    causes anemia. Red meats are rich in iron.
  • Anemia is when there are not enough red blood
    cells to carry oxygen around the body.

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Water it makes up 60 of your body and is
essential for almost every function to keep you
  • To be healthy, you should take in at least 2.5
    quarts of water each day (about 8 glasses). This
    makes up for water lost through excretion and
  • Dehydration is when the body loses more water
    then it takes in.
  • Mild dehydration can interfere with mental and
    physical performance.
  • Severe dehydration can have very serious
    consequences, including death.

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