Quince jam is a favorite jam among households. Quince is full of antioxidant properties that may reduce the risk of cancer.
Quince jam is rich of fiber but since it's tasteless to bite on just like an apple, including it in recipes such as jam is a work around it that people prefer.
Quince has various anti-viral properties as well.

3.5 ounces (100 grams) of quince jam has 267 calories. It has no saturated fat and cholesterol and it is also very low in sodium.
It is high in sugar, and to compare with a 1 liter bottle of coke, quince jam is winning by half.