Nutrition
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Nutrition. What is Nutrition?. The study of food & the way in which the body uses it 6 classes of Essential Nutrients: Carbohydrates Fats Proteins Vitamins Minerals Water Carbs, fats, proteins provides energy => calories. What is a Nutrient?.

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Nutrition

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Nutrition

Nutrition


What is nutrition

What is Nutrition?

  • The study of food & the way in which the body uses it

  • 6 classes of Essential Nutrients:

    • Carbohydrates

    • Fats

    • Proteins

    • Vitamins

    • Minerals

    • Water

  • Carbs, fats, proteins provides energy => calories


What is a nutrient

What is a Nutrient?

  • A chemical substance in food that helps maintain the body.

  • Some provide energy.

  • All help build cells & tissues, regulate bodily processes such as breathing.

  • No single food supplies all the nutrients the body needs to function.


Carbohydrates

Carbohydrates

  • main source of food energy

  • 2 types

    • Simple

    • Complex


Nutrition

Fats

  • most concentrated form of food energy

  • 3 types

    • Saturated fats

      • Leads to obesity, increased cholesterol levels & higher risk of heart attacks

    • Unsaturated fats (lower risk of heart disease)

      • Monounsaturated fats

      • Omega-3

    • Cholesterol

      • Low-density lipoproteins (LDL) – brings it to cells = plaque, “bad cholesterol”

      • High-density lipoproteins (HDL) – carries it back to liver, “good cholesterol”


Proteins

Proteins

  • Needed to build & repair body tissues (muscles, skin, hair, nails)

  • Made up of amino acids, 20 total

    • 9 essential amino acids (comes from food)

    • 11 nonessential amino acids (body makes)

  • 2 types of proteins

    • complete: contain all 9 AA (animal)

    • incomplete: contains only some essential AA (plants)


Vitamins

Vitamins

  • Needed to maintain health, regulate certain chemical reactions & allow growth

  • no energy

  • 2 types

    • Fat-soluble

      • A, D, E, K (dissolves & stored in fat)

    • Water-soluble

      • B group, biotin & vitamin C


Minerals

Minerals

  • Chemical elements that are needed for certain process

  • Some Types:

    • Sodium

      • No more than 2,400 milligrams (1 ¼ tsp)

      • acts as electrolytes, helps control fluid levels in body, muscle movements, nerve singles, transportation of nutrients

    • Calcium

      • 1,300 milligrams (1 cup milk = 300 milligrams)

      • for normal growth of bone & teeth

    • Iron

      • Girls = 18 mlg, boys = 12 mlg

      • helps create red blood cells

      • Lacking = anemia (not enough red blood cells to carry oxygen around body)


Water

Water

  • ~60% of your body is water

  • Need at least 8 glasses a day

  • functions: chemical reactions; maintains acidity of body; helps supply energy, transport gas, nutrients & waste, control body temp

  • Dehydration: Lose more than taken in

  • How do you know if your drinking enough?

    • Urine should be clear & odorless


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