vitamins and classification of vitamins | Fat soluble vitamins and water Soluble Vitamins

Vitamins :

Vitamins are the inorganic compounds present in food and are required for normal growth, maintaince and reproduction.Their absence in food may produce specific diseases.
Vitamins, fat soluble vitamins, water soluble vitamins

There are 2 types of vitamins -

(1) Fat soluble

 vitamins - vit A, D, E, and  K
(2)  Water soluble vitamins - vit B and C

Vitamin A :

It is a complex primary alcohol. It occurs in two form.
(1)  Vitamin A1
(2)  Vitamin A2
Vitamin A is derived from certain pigments are called carotinoids.

Sources : 

-  Fish liver oils like shark liver oil and cod liver oil.
-  Egg yolk, cheese, and vegetables.

Function :

1. Normal growth and reproduction.
2. Formation of bones and teeth.

Deficiency diseases :

1.  Night blindness
2.  Keratinisation of conjuctiva leading to xerophthalmia.

Vitamin D :

The important two forms of vitamin D are  -
-  Vitamin D2 or ergocalciferol .It is obtained by irradition of ergosterol present in yeast or ergot.
-   Vitamin D3 or cholechelciferol. It is produces in human skin by irridation.

Sources : 

Vitamin D is present in fish liver oil, and also in egg yolk.

Function :

-  Vitamin D absorbed calcium and phosphorous in the intestine.
-  It stimulates calcification of bones.
-  It can prevents or cure rickets.

Deficiency diseases :

Rickets in children and osteomalacia.

Vitamin E :

Vitamins E activity is presents in a grop of compounds called tocopherols.

Source :

Vegetables like cotton seed oil and sunflower oil and animal egg, meat, fish, liver etc.

Function :

-  Vitamin E prevents vitamins A and unsaturated fatty acid from oxidant dammage.
-  Vitamin E prevents sterility in both male and female .

Deficiency diseases :

-  Sterility and intrauterine death of foetuses has been shown in rats.
-  Weaknness of muscles.

Vitamin K :

The three importants form of vit K are 
-  Vitamin K1
-  Vitamin K2
-  Vitamin K3

Sources :

Green leafy vegetables, cabbage, and tomatoes.

Functions :

(1)  It is essential for the synthesis of prothrombin.
(2)  It can be used to stop anticoagulant action.

Deficiency disease :

Bleeding and hemorrhage.



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