Parsley is considered an herb, vegetable and spice. Used as a seasoning and garnish for everything edible. Parsley is rich in many vital vitamins, including Vitamin C, B 12, K and A. This means parsley keeps your immune system strong, tones your bones and heals the nervous system, too. It helps flush out excess fluid from the body, thus supporting kidney function. Regular use of parsley can help control your blood pressure.