Ailments / Situations Where Used

Any ailment involving excess histamine production can benefit from quercetin's antihistamine and antiallergenic properties. This includes environmental / seasonal / tree pollen allergies and hay fever.

Quercetin also has anti-inflammatory properties and is useful in treating asthma, bronchitis, chronic obstructive pulmonary disease, common colds, flu, and sinusitis.

Quercetin blocks an enzyme that leads to sorbitol accumulation. As a result, it may reduce problems associated with diabetes, including diabetic cataracts, neuropathy (nerve damage), retinopathy (eye damage), and kidney damage.

Its antioxidant properties help prevent cardiovascular disease by protecting against LDL ("bad") cholesterol.