basic objective of this lecture is to present on Vitamins. The story of vitamin dates back to 18th century. Sailors of this period knew that eating of liver cures a disease called night blindness and Eating of lemons cures another disease called scurvy. Also cod liver oil cures a disease called rickets. A vitamin is an organic compound and a vital nutrient that an organism requires in limited amounts. Vitamins are micronutrients, which are very much essential for growth and for metabolism.