Its active ingredients are:

It contains plenty of vitamins (A, B1, B2, C, E, P) and more than 27 kinds of trace minerals, plus malic acid and tannic acid.
It has got the highest pectin content among fruits.
Its influences:
Digestion problems. Acid effect of quince apples mobilise the entire digestive system, helps stomach to get rid of its content in the most natural way possible.

–Colitis (cools intestines and mitigates pain).
–Diarrhoea
–Constipation
–Rheumatism. Quince apple juice might be efficient in case of inflammations, affects mitigating on pain.
–Regulates cholesterol levels of the blood.
–Promotes healing of scurvy and haemophylia.
–It is widely used as an antispasmodic medicine in case of menorrhalgia symptoms
It has got tranquillizing and cooling properties.