. "It is a source of both magnesium and calcium, and especially potassium.Parsley is high in vitamin A, beta-carotene and vitamin C. As a wholesome organic-food it is also a good choice for bone health with vitamin K (536 mg in an average serving).Traditionally. parsley has been used for congestion and inflammation of the kidneys and bladder, gravel, stones, and urine retention." . . .