Peanuts are a great source of many vitamins and minerals. They contain high amounts of biotin, which is especially important during pregnancy. Peanuts also provide copper, which many Western diets lack, and copper deficiencies can negatively impact heart health. Additionally, peanuts are a good source of niacin, folate, manganese, vitamin E, thiamin, phosphorus, and magnesium - all important nutrients that support various functions in the body from energy production to tissue growth and heart health protection.