Food consists of the following components.
1. Carbohydrates
2. Lipids
3. Proteins
4. Vitamins
5. Minerals
6. Water
Of these, the first three are essential items in food.
Carbohydrates are energy producers.
lipids are reserve materials.
Proteins are body builders.
Energy values of food
a. Calorific Fuel Value
It is th eenergy liberated by one gram of food in an apparatus called Bomb http://www.blogger.com/img/blank.gifCaloric Meter. The values are
1g Carbohydrates = 4.5 kCal
1g Lipids = 9.3 kCal
1g Proteins = 5.6 kCal
b. Physiological fuel value
It is the energy liberated by 1g of food in human body. They are
1g Carbohydrates = 4 kCal
1g Lipids = 9 kCal
1g Proteins = 5 kCal
continue with Nutrition, Human digestive system, Digestion of Carbohydrates, Digestion of lipids, Digestion of proteins
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