Parsley is very high in the green pigment chlorophyll which is a detoxifier/chelator of heavy metals, and a deodoriser, masking the odour of other foods. Chewing on parsley after a pungent dish such as with garlic helps to freshen breath. It is also rich in the Vitamin A rich, yellow, carotene pigments such as zeathanthin is necessary for macular health in the eye.
Parsley is an excellent source of Vit A, K and C. It also contains Vit B1, B2, B3, B5, B6, Folic acid, Iron, Potassium, Zinc, Manganese, Magnesium and Calcium! The combination of high Vit C and Iron makes parsley an excellent source of non-haem iron for vegetarians, given Vit C increases the uptake of iron in the body.