Yes, quercetin is a natural antihistamine that stabilizes mast cells and reduces histamine release. It helps alleviate seasonal allergic rhinitis, eye itching, and sneezing. The best results are achieved by starting quercetin supplementation 2-4 weeks before allergy season at a dose of 500-1,000 mg per day.

Quercetin has antiviral and anti-inflammatory properties that support the immune system's resilience. It inhibits viral replication and modulates cytokine production. Quercetin also improves zinc absorption into cells (as an ionophore), which is why they are recommended together to maximize immune support.

A typical dose is 500-1,000 mg per day, divided into 2 doses. For allergies, 500 mg twice daily is effective. To improve quercetin's bioavailability, combine it with vitamin C or choose the quercetin phytosome form. Take with meals for better absorption.

Quercetin is generally well-tolerated at doses up to 1,000 mg per day. Higher doses may cause headaches, stomach pain, or tingling in the extremities. Quercetin can interact with certain medications, especially antibiotics and blood-thinning drugs. Pregnant and breastfeeding women should consult a doctor before use.