--- product_id: 63589915 title: "THORNE - Quercetin Phytosome - Antioxidant Supplement for Immune Health, Respiratory Support & Seasonal Allergy Relief* - Third-Party Certified - Gluten, Dairy & Soy-Free - 60 Capsules" brand: "thorne" price: "VT17987" currency: VUV in_stock: true reviews_count: 13 category: "Thorne" url: https://www.desertcart.vu/products/63589915-thorne-quercetin-phytosome-antioxidant-supplement-for-immune-health-respiratory-support store_origin: VU region: Vanuatu --- # Sophora japonica flavonoid power Third-party certified purity 20x bioavailability boost THORNE - Quercetin Phytosome - Antioxidant Supplement for Immune Health, Respiratory Support & Seasonal Allergy Relief* - Third-Party Certified - Gluten, Dairy & Soy-Free - 60 Capsules **Brand:** thorne **Price:** VT17987 **Availability:** ✅ In Stock ## Summary > 🛡️ Elevate your immune game with nature’s most bioavailable antioxidant! ## Quick Answers - **What is this?** THORNE - Quercetin Phytosome - Antioxidant Supplement for Immune Health, Respiratory Support & Seasonal Allergy Relief* - Third-Party Certified - Gluten, Dairy & Soy-Free - 60 Capsules by thorne - **How much does it cost?** VT17987 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/63589915-thorne-quercetin-phytosome-antioxidant-supplement-for-immune-health-respiratory-support) ## Best For - thorne enthusiasts ## Why This Product - Trusted thorne brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Clean & Pure Formula:** Gluten, dairy, soy-free with third-party certification ensuring label accuracy - • **Immune Armor All Year:** Supports balanced histamine release & respiratory health through seasonal shifts - • **Plant-Powered Potency:** Harnesses a 20x more absorbable quercetin phytosome from Sophora japonica flowers - • **Oxidative Stress Shield:** Neutralizes free radicals to protect cells and slow aging - • **Clinically Trusted Brand:** Chosen by 100+ pro sports teams & top healthcare practitioners in 2023 ## Overview THORNE Quercetin Phytosome delivers a clinically trusted, third-party certified antioxidant supplement featuring a 20x more bioavailable plant flavonoid complex. Designed for year-round immune support, respiratory health, and seasonal allergy relief, it’s free from gluten, dairy, and soy—perfect for health-conscious professionals seeking clean, effective wellness solutions. ## Description Foundational Wellness Visit the Store Foundational Wellness Visit the Store Sports Nutrition Visit the Store Sports Nutrition ## Features - 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) ## Technical Specifications | Specification | Value | |---------------|-------| | 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 | #6,411 in Health & Household ( See Top 100 in Health & Household ) #22 in Polyphenol Antioxidant Supplements | | Brand | THORNE | | Brand Name | THORNE | | Container Type | Bottle | | Customer Reviews | 4.7 out of 5 stars 2,337 Reviews | | 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 | 0.13 Pounds | | 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 | | Specific Uses For Product | Immune & Allergy Support | | UPC | 693749004356 | | Unit Count | 60 Count | ## Product Details - **Brand:** THORNE - **Diet Type:** Gluten Free - **Flavor:** Unflavored - **Item Form:** Capsule - **Primary Supplement Type:** antioxidant supplement ## Images ![THORNE - Quercetin Phytosome - Antioxidant Supplement for Immune Health, Respiratory Support & Seasonal Allergy Relief* - Third-Party Certified - Gluten, Dairy & Soy-Free - 60 Capsules - Image 1](https://m.media-amazon.com/images/I/71aVcjDhxaL.jpg) ![THORNE - Quercetin Phytosome - Antioxidant Supplement for Immune Health, Respiratory Support & Seasonal Allergy Relief* - Third-Party Certified - Gluten, Dairy & Soy-Free - 60 Capsules - Image 2](https://m.media-amazon.com/images/I/71mNwjRsPKL.jpg) ![THORNE - Quercetin Phytosome - Antioxidant Supplement for Immune Health, Respiratory Support & Seasonal Allergy Relief* - Third-Party Certified - Gluten, Dairy & Soy-Free - 60 Capsules - Image 3](https://m.media-amazon.com/images/I/81F+5J9N04L.jpg) ![THORNE - Quercetin Phytosome - Antioxidant Supplement for Immune Health, Respiratory Support & Seasonal Allergy Relief* - Third-Party Certified - Gluten, Dairy & Soy-Free - 60 Capsules - Image 4](https://m.media-amazon.com/images/I/81D+ZcIXj7L.jpg) ![THORNE - Quercetin Phytosome - Antioxidant Supplement for Immune Health, Respiratory Support & Seasonal Allergy Relief* - Third-Party Certified - Gluten, Dairy & Soy-Free - 60 Capsules - Image 5](https://m.media-amazon.com/images/I/81kwqw8xLQL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: How is this different then general quercetin?** A: Thorne's Quercetin Phytosome utilizes the advanced technology of phytosome complexes. Phytosome complexes are created by a patented process that binds a designated botanical extract to a phospholipid. Phospholipids are readily absorbed key components of cell membranes, and when complexed with a botanical, the phospholipid increases the absorbability of the botanical to which it is combined. In Thorne’s Quercetin Phytosome, quercetin is combined with plant-based phospholipids to create a phytosome complex that significantly enhances the absorption of the quercetin through the cell membrane, compared to quercetin by itself. **Q: What is the standardized quercetin phytosome content of thorne quercetin phytosome from flower extract?** A: I emailed Thorne and this was their reply: It is approximately 40% quercetin, so the product contains approximately 100mg of quercetin. Quercetin phytosome demonstrates 20x absorption vs standard quercetin in clinical studies. **Q: Is the L-leucine derived from corn? Is this product free of corn?** A: The leucine is derived from duck feathers, which are not pulled from the ducks but collected as they fall out. None of Thorne’s finished products contain corn, however, occasionally a product might contain an ingredient derived from corn. These are purified and considered non-allergenic. The quercetin in Thorne's Quercetin Phytosome supplement is derived from Saphora japonica, which is a plant. The phospholipid complex is derived from sunflower. **Q: What Color is the powder suppose to be?** A: The powder in the capsules of Thorne’s Quercetin Phytosome can vary in color from pale yellow to orange, and can sometimes have a speckled or slightly mottled appearance. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by K***R on March 23, 2026* ### ⭐⭐⭐⭐⭐ Review *by M***A on March 18, 2026* ### ⭐⭐⭐⭐⭐ Review *by B***Z on April 28, 2026* ## Frequently Bought Together - THORNE Quercetin Phytosome - Exclusive Phytosome Complex for Immune Health, Respiratory Support, and Seasonal Allergy Relief* - 60 Capsules - THORNE NAC - N-Acetylcysteine - 500mg - Supports Respiratory Health and Immune Function*; Promotes Liver and Kidney Detox - 90 Capsules - THORNE Vitamin D-5000 - Vitamin D3 Supplement - Support Healthy Bones, Teeth, Muscles, Cardiovascular, and Immune Function* - NSF Certified for Sport - Dairy-Free, Soy-Free - 60 Capsules --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.vu/products/63589915-thorne-quercetin-phytosome-antioxidant-supplement-for-immune-health-respiratory-support](https://www.desertcart.vu/products/63589915-thorne-quercetin-phytosome-antioxidant-supplement-for-immune-health-respiratory-support) --- *Product available on Desertcart Vanuatu* *Store origin: VU* *Last updated: 2026-05-07*