Basil is known as the king of herbs. Basil is an excellent source of a variety of key nutrients, including vitamin C, calcium, vitamin A, phosphorus, magnesium, potassium and iron. The chemical compounds present in basil leaves and flowers have disease preventing properties. They are not only delicious but offer the body a variety of health benefits, including the prevention of certain cancers and cholesterol problems. Basil can be used to strengthen your kidneys. In cases of stones in your kidney, the juice of basil leaves mixed with honey and taken daily for 6 months will expel them through the urinary tract.