Groundnut is also known as peanut, earthnut, monkey nut and Manila nut. Among the oilseed crops, groundnut has first Groundnut oil is primarily used in the manufacture of vegetable oil . Groundnut seed contains about 45 per cent oil and 26 per cent protein about as concentrated a food as money can buy; one gram supplies 5.8 food calories. This compares with 4.0 calories per gram for sugars, 3.5 calories for whole wheat, 2.6 calories for bread. The biological value of groundnut protein is among the highest of the vegetable proteins, and equals that of casein. Groundnuts are a good source of all B vitamins except B12. They are a rich source of thiamin, riboflavin, nicotinic acid and vitamin E. However, they lack in vitamin A. With regard to minerals, phosphorus, calcium and iron are present in significant amount.