This document discusses the six major classes of nutrients: carbohydrates, fats, proteins, vitamins, minerals, and water. It provides details on the functions and food sources of carbohydrates, fats, and proteins. Carbohydrates include sugars and starches and provide the body with energy. Fats provide long-term energy storage and are obtained from foods like meat and dairy. Proteins are used to build and repair tissues and are found in foods like meat and eggs. The document also defines what a calorie is and explains that a calorie deficit or surplus of 3,500 calories corresponds to losing or gaining a pound of weight.

1. AYIDA MERIN AJU
B.Ed PHYSICAL SCIENCE
MOUNT TABOR TRAINING COLLEGE,
PATHANAPURAM

2. Objectives
 Name the six classes of nutrients.
 Identify the functions and food
sources of carbohydrates, proteins,
and fats.
 Explain calories and uses

3. What Is Nutrition?
 Nutrients are the substances in food that
provide energy or help form body
tissues and are necessary for life and
growth.
 Along with exercise, a proper diet is
essential for weight control and physical
fitness.

5. Six Classes of Nutrients
 • Carbohydrates
 • Fats
 • Proteins
 • Vitamins
 • Minerals
 • Water
 •A Balanced Diet To be healthy, you
need the right amount of nutrients from
each class.

6. Carbohydrates

7.  Carbohydrates are energy-giving
nutrients that include sugars, starches,
and fiber.
 Carbohydrates are the sugars, starches
and fibers found in fruits, grains,
vegetables and milk products.
 Sugars are the simplest form of
carbohydrates.
 Starches are more complex
carbohydrates that can be broken down
into sugars.

10. Simple Sugars
 Glucose is a single sugar
 Fructose, lactose and sucrose are
 double sugars and are linked with
glucose
 Glycogen: quick energy stores
 If you eat more than your body needs it
is stored as fat

11. Fats
 Fats are the body’s main form of
long-term energy storage.
 Fats are large molecules made up of
fatty acids and glycerol.
 Fatty acids are long chains of carbon
atoms attached to hydrogen atoms.
 Fats are classified by the types of fatty
acids they contain.

12. Cholesterol
 Cholesterol is necessary for certain
essential functions in the body.
 Low-density lipoprotein: brings
cholesterol to the body cells.
 When your LDL is too high plaque is
deposited on the walls of blood vessels.
 LDL= bad cholesterol.
 HDL=good cholesterol

13. Protein
 Proteins are made of amino acids,
which are used in building and repairing
structures in the body.
 Proteins are also needed for hormones,
enzymes, and other essential
molecules.

15. Uses for Proteins
 Body building nutrient
 Build & repair tissue
 Hormones, enzymes, antibodies
 Energy
 Americans get too much protein
 Excess stores as fat
 1 gram of protein = 4 calories

16. What Is a Calorie?
 A calorie is the amount of heat needed
to raise the temperature of a liter of
water 1 degree.
 Relax. It is just a scientific way to
measure energy.

17. What Do You Need to Know
About Calories?
 Think about what you regularly eat,
 What your calorie needs are,
 It takes approximately 3,500 calories
below your calorie needs to lose a
pound of body fat.
 It takes approximately 3,500 calories
above your calorie needs to gain a
pound