What makes Thorne supplements high quality?

Thorne produces high-quality supplements through rigorous testing, well-researched ingredient sourcing, and strict manufacturing standards. We avoid unnecessary additives, binders, and fillers that may interfere with nutrient absorption.

How does Thorne test its supplements for quality?

To confirm the purity of our ingredients, the potency of our formulas, and the absence of all contaminants, we carry out a minimum of four rounds of testing on every product we manufacture. 100+ Thorne employees are dedicated to ensuring quality.

Are Thorne supplements clinically tested and safe?

Thorne partners with researchers and conducts clinical trials to support the efficacy of our products. Our team of doctors and medical experts substantiate each ingredient in every formula based on extensive clinical research and medical literature.

Why are Thorne products more expensive than other supplements?

When it comes to the health of our customers, we never settle. Thorne products may be priced higher than some others because of our commitment to quality at every step. We don’t simply meet the standard in dietary supplements — we set the standard.

Where are Thorne supplements made and where are the ingredients sourced from?

Located in South Carolina, Thorne manufactures supplements in the USA using globally sourced ingredients. When it comes to ingredient sourcing, we seek out only the highest-quality ingredients, selecting each one for its purity and effectiveness.

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Quercetin Phytosome - Antioxidant Supplement for Immune Health, Respiratory Support & Seasonal Allergy Relief* - Third-Party Certified - Gluten, Dairy & Soy-Free - 60 Capsules

Product ID: 63589915

Details

Age Range (Description)
Adult
Brand
THORNE
Diet Type
Gluten Free
Flavor
Unflavored
Item Form
Capsule
Item Weight
2.08 ounces

🌿Sophora japonica flavonoid power

🔬Third-party certified purity

🛡️20x bioavailability boost

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Description

🛡️ Elevate your defense with nature’s most bioavailable antioxidant!

CLEAN PURE FORMULA - Gluten, dairy, soy-free, and rigorously third-party tested to ensure safety and transparency.
PLANT POWERED POTENCY - Harnesses a potent flavonoid from Sophora japonica, delivered in a phytosome form 20x more absorbable than standard quercetin.
IMMUNE ARMOR ACTIVATED - Supports year-round immune resilience and balanced histamine regulation for seasonal peace of mind.
OXIDATIVE STRESS SHIELD - Neutralizes free radicals to protect cells from aging and environmental damage.
CLINICALLY TRUSTED EXCELLENCE - Chosen by 100+ pro sports teams and top healthcare practitioners for unmatched quality and efficacy.

THORNE Quercetin Phytosome is a premium antioxidant supplement designed to enhance immune function, support respiratory health, and ease seasonal allergies. Featuring a highly bioavailable flavonoid extract from Sophora japonica, it offers 20 times greater absorption than standard quercetin. Third-party certified and free from common allergens, this trusted formula is favored by elite athletes and healthcare professionals alike.

Specifications

ASIN	B0797DQTVZ
ASIN	B0797DQTVZ
Age Range Description	Adult
Allergen Information	Dairy Free, Egg Free, Fish Free, Peanut Free, Shellfish Free, Soy Free, Tree Nut Free
Best Sellers Rank	#8,344 in Health & Household ( See Top 100 in Health & Household ) #26 in Polyphenol Antioxidant Supplements
Brand Name	THORNE
Container Type	Bottle
Customer Reviews	4.7 4.7 out of 5 stars (2,358)
Date First Available	June 5, 2014
Diet Type	Gluten Free
Dosage Form	Capsule
Flavor	Unflavored
Item Dimensions	2.09 x 2.09 x 3.72 inches
Item Form	Capsule
Item Weight	2.08 ounces
Item model number	SB335
Manufacturer	Thorne Research
Manufacturer	Thorne Research
Manufacturer Part Number	SB335
Model Name	SB335
Model Number	SB335
Number of Items	1
Primary Supplement Type	antioxidant supplement
Product Benefits	Immune Support
Product Dimensions	2.09 x 2.09 x 3.72 inches; 2.08 ounces
Specific Uses For Product	Immune & Allergy Support
UPC	693749004356
Unit Count	60 Count

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Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

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Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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The delivery time was excellent, and the packaging was secure.

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$106.81

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In stock

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