Quercetin Complex
Scored by the Formulate Research Team · Last reviewed May 2026
Overview: Thorne Quercetin Complex
A combination of quercetin phytosome and bromelain that provides support for allergy sufferers, enhances immune function, and helps reduce bruising and swelling* Quercetin Complex combines bromelain, a compound of protein-digesting enzymes, with a highly absorbable form of quercetin. Quercetin stabilizes the body's mast cells, which store and release histamine.*
Score Breakdown
Formulate scores every product across six weighted dimensions. Each dimension is graded independently — hover or tap to see what drove each component.
Ingredients per Serving
| Ingredient | Amount |
|---|---|
| Bromelain | 300 mg |
| Quercetin PhytosomePhospholipid complex from Sunflower | 750 mg |
Certifications & Testing
Other Ingredients
Hypromellose (derived from cellulose) capsule, Leucine, Microcrystalline Cellulose, Silicon Dioxide
Recommended Use
Take 1 capsule three times daily or as recommended by your health-care practitioner.
Warnings
ALLERGY WARNING This product is contraindicated in an individual with a history of hypersensitivity to any of its ingredients. PREGNANCY If pregnant, consult your health-care practitioner before using this product. INTERACTIONS Because bromelain has fibrinolytic effects that may potentially inhibit blood clotting, Quercetin Complex should be used with caution or avoided in individuals on anticoagu
Frequently Asked Questions
What is Thorne Quercetin Complex's Formulate score?
Thorne Quercetin Complex scores 90 out of 100 (grade A) on Formulate's ingredient-level rubric, which weighs evidence quality, dose accuracy, bioavailability, transparency, safety, and manufacturing practices.
Is Thorne Quercetin Complex worth it?
Thorne Quercetin Complex scores 90/100 (grade A). That puts it in Formulate's top tier: its ingredient doses, forms, and label transparency hold up against the clinical evidence, and it carries credible third-party testing. Formulate grades every product with the same automated rubric, so the score reflects the formula — not marketing or sponsorships.
What's in Thorne Quercetin Complex?
Each serving contains Bromelain (300 mg), Quercetin Phytosome (750 mg). Serving size: 1 Capsule. 60 servings per container.
How do I take quercetin complex?
Take 1 capsule three times daily or as recommended by your health-care practitioner.
Who makes Quercetin Complex?
Quercetin Complex is made by Thorne. See Formulate's full grade and product lineup for Thorne on its brand page.
Is Thorne Quercetin Complex third-party tested?
Thorne lists the following certifications and testing for this product: NSF Certified, Gluten Free, Dairy Free, Soy Free, Thorne Verified, Natural Flavors, Natural Colors, GMP Certified.
Related Supplements
Track quercetin complex in your stack
Build a personalized supplement stack free in your browser — no install. Flag dose overlaps and interactions, and keep every product scored against the latest evidence.
Disclosure. Formulate may earn a commission from purchases made through links on this page. Commissions never influence scores — every product is graded by the same automated rubric. This page is for educational purposes only and does not replace advice from a qualified healthcare provider.