Quince  is a tree with a hard yellow fruit. The fruit is eaten in jams and baked goods. The fruit and leaves have been used as medicine.

Some chemicals in quince might change how the immune system responds to substances that cause allergic reactions.

Quince is used for persistent heartburn in children. Quince is also used for morning sickness, hay fever, stomach ulcers, and many other conditions, but there is no good scientific evidence to support these other uses.