Peanuts are rich in fatty oil, and the oil contains glycerides of various fatty acids. The unsaturated fatty acid accounts for more than 80%; it also contains rich protein and various essential amino acids; lecithin, purine, choline, carotene , Vitamins B1, B2, E, pantothenic acid, calcium, phosphorus, iron, sterols, triterpene saponins, cellulose. The seed coat contains lipids, sterols, tannins, etc.