Peanuts are rich in energy (567 calories per 100 g) and contain health benefiting nutrients minerals antioxidants and vitamins that are essential for optimum health. They compose sufficient levels of monounsaturated fatty acids (MUFA) especially oleic acid. Consumption of peanuts can help prevent gallstones. According to studies eating an ounce of peanuts or peanut butter can lower the risk of developing gallstones by 25%.