Page 5 - exemple

D- Vitamins

Vitamins or functional foods are vital substances. When the food
diet lacks vitamins, many disorders may occur. Vitamins act in
small doses and are involved in the regulation of our body.
We classify them in two groups according to their solubility in fats
(liposoluble vitamins) or in water (hydrosoluble vitamins). The
liposoluble vitamins are A, D, E and K whereas the hydrosoluble
vitamins are B (B , B , PP, B , B , B ), vitamin C and vitamin P.
1 2 6 10 12
Certain vitamins are destroyed by heat.

Doc 13
♦ Main components of certain foods:
Complex foods are formed of simple molecules (organic or mineral).

Doc 8 :

Cow meat Cow milk Bread Egg
(in %) (in %) (in %) (in %)

Proteins 20 4 0,7 12
Lipids 10 4 1 10

Carbohydrates 0.7 5 56 0.25

Water 68 85 34.8 77
Mineral salts + vitamins 1.3 2 1.57 1,25

Doc 14- Composition in percentage of certain foodstuffs.

Probing of activity 1

1- Name the elements that compose organic foodstuffs.
2- Distinguish between mineral and organic substances.
3- Define the terms: “disaccharides and polysaccharides”.
4- What is the role of proteins in the food diet?
5- Name the molecule formed by two or many amino acids.
6- Name some foodstuffs rich in proteins.
7- Lipids and carbohydrates are energetic foodstuff whereas proteins are plastic foodstuffs. To
which classification do we refer to?

Food 9