Discovery years of vitamins

Vitamin Name	Year of discovery
Vitamin A (Retinol)	1913
Vitamin B1 (Thiamine)	1910
Vitamin C (Ascorbic acid)	1920
Vitamin D (Calciferol)	1920
Vitamin B2 (Riboflavin)	1920
Vitamin E (Tocopherol)	1922
Vitamin B12 (Cobalamins)	1926
Vitamin K1 (Phylloquinone)	1929
Vitamin B5 (Pantothenic acid)	1931
Vitamin B7 (Biotin)	1931
Vitamin B6 (Pyridoxine)	1934
Vitamin B3 (Niacin)	1936
Vitamin B9 (Folic acid)	1941

Food Source of vitamin

Vitamin Name	Food source
Vitamin A (Retinol)	Cod liver oil
Vitamin B1 (Thiamine)	Rice bran
Vitamin C (Ascorbic acid)	Citrus, most fresh foods
Vitamin D (Calciferol)	Cod liver oil
Vitamin B2 (Riboflavin)	Meat, eggs
Vitamin E (Tocopherol)	Wheat germ oil, unrefined vegetable oils
Vitamin B12 (Cobalamins)	liver, eggs, animal products
Vitamin K1 (Phylloquinone)	Leafy green vegetables
Vitamin B5 (Pantothenic acid)	Meat, whole grains,
Vitamin B7 (Biotin)	Meat, dairy products, eggs
Vitamin B6 (Pyridoxine)	Meat, dairy products
Vitamin B3 (Niacin)	Meat, eggs, grains
Vitamin B9 (Folic acid)	Leafy green vegetables

Kinds of Vitamin

There are many kinds of vitamin named :

1. Vitamin A
2. Vitamin B1
3. Vitamin B2
4. Vitamin B3
5. Vitamin B5
6. Vitamin B6
7. Vitamin B7
8. Vitamin B9
9. Vitamin B12
10. Vitamin C
11. Vitamin D
12. Vitamin E
13. Vitamin K

What is Vitamin ?

Vitamin is a natural group of compounds which is very important for human growth and nutrition but it must be use in a scientific quantity.

There are many definition on the web just go to Google and type define:vitamin in the search box.As like the following picture:

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