January 14th, 2008
Introduction- What should I eat? It depends!
Vitamins: not always safe, we don
t always know what
s in them:
Consumer lab certiFcation
GMOs: 70% of processed foods contain GMOs
Global nutrition: micronutrient deFciencies, global food supplies, globalization
We have issues! Why?
fast food, convenient food, buffets, portion sizes, cars, elevators, segways, television, genetics, social
expectations, advertising, hormones, lifestyle.
sciences of food
nutrition, nutrients, their action, interaction, balance
health and disease
what humans ingest, digest, absorb and utilize
s a science, but it
s complicated; science studies what it knows
Chemicals in foods are critical to human growth and function
Purposes: energy, growth and development, maintenance of body functions
6 classes of nutrients:
What is a Calorie?
-the amount of energy (heat) required to raise the temperature of liter of water 1
-1 pound of body fat= 3500kcal
-the amount of energy (kcal) in a food compared to its overall weight
-carbohydrate = 4 kcal/gram
-fat = 9 kcal/gm
-protein = 4 kcal/gm
-alcohol= 7 kcal/gm
-the amount of vitamins and minerals in a food compared to its energy content