Transcript Aim: Why is a healthy diet important?

Aim: Why is a healthy diet
important?
• How do we know
how much energy
is in a nutrient?
• Calories: energy
stored in food
• How many calories
should you eat a
day?
Active Teenagers:
Males – 2,500 Calories
Females- 2,200 Calories
Calorie
• A unit used to measure the energy content
of food (nutrients).
» More specifically, a calorie is defined as the
amount of heat required to raise the
temperature of 1 gram of water 1 degree
Celsius.
» The Calorie that is used on nutritional labels
is actually 1000 of these scientific calories.
• In general, the more calories a food
product contains, the more energy it can
release.
A: The size of a single serving
& the # of servings in the
container.
B: The total Calories in one
serving of food & how many
Calories from fat.
C: mg & g of nutrients as well as
the percentage of the Daily Value
in one serving.
D: Percentage Daily Value for
Vitamins & minerals.
E: Provides information on
recommended daily nutrient
intake for people who require
2,000 or 2,500 Calories per
day.
G: Lists the ingredients in the
food, from the most abundant
to the least.
Nutrients
• Substances in food that are needed for
energy, growth and repair.
–Carbohydrates ALL MUST BE
–Fats
PRESENT IN
YOUR DIET !
–Proteins
–Vitamins and Minerals
–Water
Food Pyramid
Fats, oils, and
sweets
Milk, yogurt,
and cheese
Vegetables
60%
10%
30%
Meat, poultry,
and fish
Fruits
Bread and
Grain
Carbohydrates
STORAGE
STORAGE
BLOOD
LIVER
• Main
source of energy
• Ex. Bread, pasta, potatoes, rice
• Digested Carbs = glucose
Fiber: found in fruits, vegetables and
grains is a good source of
ROUGHAGE. Fiber helps intestinal
muscles to keep food and wastes
moving along.
Fats (Lipids)
• Energy Source
FAT
• Provides the most energy per gram
• Needed for cell membranes,
nervous system, insulation, and
cushions organs.
• Types: Saturated & Unsaturated.
Proteins
• Digested into amino acids.
• Used to make hormones and enzymes.
Proteins can also be used build and repair
body parts.
• Ex. Meat, eggs, beans, nuts.
Vitamins and Minerals
• Nutrients the body needs in SMALL
amounts.
Vitamin D
Vitamins
Coenzymes
• Organic molecules that aid in chemical
reactions
• Ex: Vitamin A and Vitamin D
hemoglobin
• Inorganic
substances
required for the
body to function
normally. Ex:
Iron and calcium
Minerals
Water
• The most important of all nutrients
• Why is water the most important nutrient
when it has NO nutritional value and
provides NO energy?
»Because all of the body
processes and chemical
reactions take place in water.
Over half of your body weight is water.
Women 50%
Men 60%