ingestible · for seasonal allergies
Quercetin Supplement
Reviewed by the Nimbera editorial team · Last updated May 2026
How to use
Take 500mg quercetin daily 4-6 weeks before your typical allergy season begins. Take with food.
How it works
Quercetin is a flavonoid that stabilizes mast cells and reduces histamine release - the same process targeted by antihistamine drugs. Human clinical trial data is still limited.
Where to buy
Health food stores and supplement retailers. Look for quercetin phytosome or quercetin paired with bromelain for better absorption.
Typical cost: $15-35
Safety notes
Limited human trial evidence - set expectations accordingly. Can interact with antibiotics, blood thinners, and cyclosporine. Not for use in pregnancy.
Drug & supplement interactions
- Always tell your doctor or pharmacist about any supplements you take.
- Interactions can occur with prescription medications, blood thinners, and immunosuppressants.
- Herbal remedies can affect how the body absorbs or metabolises drugs.
- Check drugs.com interactions checker before starting.
Clinical source
NCCIH; Journal of Allergy (in vitro data)This information is compiled from primary clinical literature and is for informational purposes only. It is not a substitute for professional medical advice. Read our full disclaimer.