Posted by : Razib smile Monday, July 22, 2013

What is Vitamins ?

Vitamin may be defined as organic chemical substance, minute quantity of which is required and essential for the growth, development and maintenance of body . Only a few vitamins are synthesized in human body . As for example : vitamin K is synthesized in the body by intestinal symbiotic bacteria . Other than , vitamin D is synthesized  in the skin by ultraviolet  ray .  

Types of Vitamins :

According  to the solubility ,Vitamin may be classified into ; 

                    1.  Fat soluble vitamins
                    2.  Water soluble vitamins 

Fat soluble vitamins:    
    Fat soluble vitamins  are those which are soluble in fat soluble solvent .They are easily stored within the body  for a long time in  the  liver and subcutaneous tissue. They are  ----
                     a)  Vitamin  A or Retinol
                     b)  Vitamin  D  or Calciferol 
                     c)  Vitamin   E  or Tocopherol 
                     d)  Vitamin  K  or  Anti- haemorrhagic factor. 

Water soluble vitamin  : -
        Water soluble vitamins are those which are soluble in water . They cannot be stored in the body more than 48 to 72 hours . They are..

                   a)  Vitamin B  complex.
                   b)  Vitamin C or Ascorbic acid . 

 pic: Vitamins

Daily Requirements Of different Vitamins : 

Vitamin                                                            Normal                                pregnant  Mother 

Vitamin A                                                       5000 i.u                                  6000- 8000 i.u 

Vitamin  D                                                      400 i.u                                      500  -  800 i.u

Vitamin   E                                                       15 -20 i.u 
                                                                        8-10 mg daily   

Vitamin  K                                 It is  synthesized  within the body according to
                                                  the requirement . But incase of  hemorrhagic 
                                                 disease 5 mg is administered orally or in injection from .  

Vitamin  C                                                       45 mg. 

Vitamin B Complex
 B1   Thiamin                                                   1.2mg                                                      1.6 mg
 B2    Riboflavin                                               1.5mg                                                      1.8 mg
 B3    Pantathonic  acid                                     5-10 mg
 B5    Nicotinic  acid                                         12-18mg 
 B6    Pyridoxin                                                2 mg                                                        2-5 mg
 B12 Cyano cobalomin                                    3mg                                                         4-5 mg 
Niacin                                                             2mg
Biotin                                                             1.2 - 2.4mg
Folic acid                                                       0.4mg

Greater will be the person's size ,greater will be the requirement . In growing children requirement is greater.              

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