May protect against certain allergic reactions

By inhibiting the activity of specific immune cells that cause allergic reactions, quinces may reduce the severity of a variety of allergy symptoms. Commercial allergy medication Gencydo mixes quince fruit extract and lemon juice. Its potential to prevent and treat mild allergic reactions, like runny nose and asthma, is supported by a few modest trials.

Quince fruit and seed extracts may also be used to treat and prevent experimentally generated allergic dermatitis, according to tests on mice. Whether they would have the same impact on humans is still up for debate. More research is required, despite some experts' speculation that quince products would be a secure substitute for conventional allergy drugs.