Write notes on vitamins.

Explanation

Vitamins are organic compounds which are required in small quantities in our diet for the maintenance of normal health. Their: deficiency causes specific diseases. Plants can synthesise almost all vitamins. Vitamins are designated by alphabets A, B, C, D, E, K. Some of them are further named as subgroups e.g `B_(1), B_(2), B_(6), B_(12)` . etc. Excess of vitamins is also harmful
Vitamins are classified into two groups depending upon their solubility in water or fat.
1) Fat soluble vitamins : These are soluble in fat and oils but insoluble in water. Vitamins A, D, E and Kare fat soluble vitamins.
2) Water soluble vitamins : B.group vitamins and vitamin C are soluble in water
Some vitamins, their sources and deficiency diseases :
Vitamin A:
Sources : Fish-liver oil, butter and milk
Deficiency diseases :Xerophthalmia, Night blindness.
Vitamin `B_(1)` (Thiamine)
Sources : Milk, green vegetables and cereals.
Deficiency diseases :Beri beri
Vitamin `B_(2)` (Riboflavin )
Sources: Milk, egg white, liver.
Deficiency diseases : Cheilosis
Vitamin C :
Sources : Citrus fruits amla and green leafy vegetables.
Deficiency diseases : Scurvy