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Intro to Nutrition (1)

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by

craig botnen

on 23 August 2016

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Transcript of Intro to Nutrition (1)

Intro to Nutrition
Why you eat what you eat
Science that links foods to health and Disease. Includes the process by which we ingest, absorb, transport, and excrete food
Provides:
Energy & Nutrients
Calories
Substances obtained from food that are vital for growth and maintenance of a healthy body throughout life
Essential Nutrients
Body needs them to survive!
Includes:
vitamins, dietary minerals, essential fatty acids, and essential amino acids
Cannot be synthesized by the body at all, or cannot be synthesized in amounts adequate for good health (
e.g. niacin, choline
)
is
Good Health?

Generally separated into 6 classes:

Carbs
Lipids
Proteins
Vitamins
Minerals
Water
Also set into 3 categories:
Provide Energy
Help with growth, development, and maintenance
keep body functions running smoothly
But we mean Kilocalorie*
*But nobody seems to care...
the approximate amount of energy needed to raise the temperature of one gram of water by one degree Celsius
We'll just use
Calories
We tend to associate calories with food, but they apply to anything containing energy. For example, a gallon (about 4 liters) of gasoline contains about 31,000,000 calories.
Just a unit of energy.
Where do they come from?
Carbs
Fats
Proteins
Alcohol
Energy is released from broken chemical bonds to:
Build new compounds
Perform muscular movements
Promote nerve transmissions
maintain ion balance within cells
4 cal per gram
9 cal per gram
4 cal per gram
7 cal per gram
Nutrition is a lifestyle factor that is a key to developing and maintaining an optimal state of health.
Poor diet and sedentary lifestyle are known to be risk factors for:
heart disease
hypertension
diabetes
cancer
Obesity is the 2nd leading cause of
preventable
death in North America
Knowledge of nutrition is the best prevention method
North Americans
The good:
We consume a wide variety (generally)
Not the most obese country
The Bad:
Poor balance of calories in vs out
2nd most obese country
The problem:
Use multivitamin as a band aid
"good" vs "bad" food
Need to look at total diet
Why am I Hungry?
Hunger vs Appetite
physical biological drive to eat
*Controlled by internal body mechanisms
psychological drive to eat
*affected by external choice
Satiety
a feeling of satisfaction that temporarily halts our desire to continue eating
effected by:
Food
Hormones
Appetite
Google this:
Nutrition
Hunger vs Appetite
Essential Nutrients
Calories
Full transcript