Parsley is a nutritional powerhouse with vitamins A, B, C and K and the minerals iron and potassium. It is a powerful anti-inflammatory and anti-oxident. It helps to eliminate excess fluid and balances blood sugar. Parsley contains high levels of a flavonoid called apigenin. There is some evidence apigenin has anti-cancer properties. Parsley helps balancing the immune system and has also shown to be beneficial for people with arthritis, as it helps reduce pain and swelling. It's also a good source of folic acid.