THORNE Quercetin Phytosome, Highly Bioavailable Quercetin, 60 Capsules

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Price: $46.00
(as of Nov 06, 2026 17:17:39 UTC – Details)

Product description

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Customer Reviews

4.7 out of 5 stars 2,422

4.7 out of 5 stars 19,081

4.8 out of 5 stars 4,218

4.4 out of 5 stars 66

4.6 out of 5 stars 3,378

4.8 out of 5 stars 9,655

4.5 out of 5 stars 6,765

Price

$46.00$46.00

$44.00$44.00

$26.00$26.00

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$41.00$41.00

$20.00$20.00

$44.00$44.00

Servings

60

90

90

30

90

60

30

Primary Benefits

Immune Support*

Sports Performance

Muscle & Sleep Support*

Foundational Health

Heart & Cognitive Health*

Foundational Health

Metabolism & Weight Management

Key Ingredients

Quercetin Phytosome

Creatine Monohydrate

Magnesium Glycinate

Multivitamin

Omega-3

Vitamin D3

Berberine HCI & Phytosome

Gluten & Dairy Free

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Trusted by 45K+ Health Pros

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NSF Certified for Sport

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NSF Contents Certified

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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.

Product Dimensions ‏ : ‎ 2.09 x 2.09 x 3.72 inches; 2.08 ounces
Item model number ‏ : ‎ SB335
Date First Available ‏ : ‎ June 5, 2014
Manufacturer ‏ : ‎ Thorne Research
ASIN ‏ : ‎ B0797DQTVZ
Best Sellers Rank: #7,967 in Health & Household (See Top 100 in Health & Household) #7 in Quercetin Antioxidant Supplements
Customer Reviews: 4.7 4.7 out of 5 stars (2,422) var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
Immune Function: Provides year-round support for a healthy immune function and support during seasonal changes, by helping to regulate histamine release; maintains a normal inflammatory response in the respiratory tract*
Botanical Benefits: Delivers a powerhouse plant flavonoid extracted from Sophora japonica flowers, in a well-absorbed phytosome format that is 20-times more bioavailable than quercetin alone*
Antioxidant Support: Helps seek out free radicals and neutralize the effects of oxidative stress, which is linked to cellular damage and accelerated aging*
Third-Party Certified: This product has been third-party tested and certified to verify what’s in the package matches what’s on the label and to confirm it contains no unsafe levels of contaminants
Trusted: Thorne is chosen by champions and trusted by 100+ professional sports teams, a proud partner of U.S. National Teams, and the #1 recommended clinical brand by health-care practitioners (2023 Health-Care Practitioner Seller Survey)
Customers find the supplement effective as a powerful anti-inflammatory and appreciate its brand reputation. Moreover, they report positive effects on sleep quality, with one customer specifically noting deeper sleep. However, experiences with allergic reactions are mixed, with some customers feeling good with their allergies while others experience nausea and headaches. Additionally, opinions on ingredients are divided.