--- product_id: 253255844 title: "Quercetin Phytosome, Highly Bioavailable Quercetin, 60 Capsules | Supports Seasonal Immune Function, Respiratory Tract Health & Healthy Aging, Antioxidant Support, NSF Contents Certified" brand: "thorne" price: "€ 99.57" currency: EUR in_stock: true reviews_count: 8 url: https://www.desertcart.hr/products/253255844-quercetin-phytosome-highly-bioavailable-quercetin-60-capsules-supports-seasonal-immune store_origin: HR region: Croatia --- # 20x more bioavailable quercetin NSF third-party certified purity Supports immune & respiratory health Quercetin Phytosome, Highly Bioavailable Quercetin, 60 Capsules | Supports Seasonal Immune Function, Respiratory Tract Health & Healthy Aging, Antioxidant Support, NSF Contents Certified **Brand:** thorne **Price:** € 99.57 **Availability:** ✅ In Stock ## Summary > 🛡️ Elevate your immune game with science-backed, ultra-absorbable quercetin! ## Quick Answers - **What is this?** Quercetin Phytosome, Highly Bioavailable Quercetin, 60 Capsules | Supports Seasonal Immune Function, Respiratory Tract Health & Healthy Aging, Antioxidant Support, NSF Contents Certified by thorne - **How much does it cost?** € 99.57 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/253255844-quercetin-phytosome-highly-bioavailable-quercetin-60-capsules-supports-seasonal-immune) ## 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 - • **Pure & Transparent:** NSF certified and free from fillers, ensuring what’s on the label is exactly what you get. - • **Potent Plant Powerhouse:** Harnesses Sophora japonica flavonoids in a phytosome form for 20x better absorption than standard quercetin. - • **Year-Round Immune Shield:** Regulates histamine and supports a balanced inflammatory response to keep you resilient through seasonal shifts. - • **Antioxidant Defense Boost:** Neutralizes free radicals to protect cells from oxidative stress and promote healthy aging. - • **Clinically Trusted Quality:** Backed by rigorous testing and preferred by 100+ pro sports teams and healthcare practitioners nationwide. ## Overview THORNE Quercetin Phytosome delivers a highly bioavailable form of quercetin—20 times more absorbable than standard extracts—supporting immune function, respiratory health, and antioxidant defense. Manufactured in the USA with NSF third-party certification, it’s trusted by elite athletes and healthcare professionals for purity, potency, and clinical validation. ## Description Quercetin Phytosome Basic Nutrients Creatine Magnesium Glycinate Super EPA Berberine Magnesium Bisglycinate 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 produce. 100+ Thorne employees are dedicated to ensuring quality. Are Thorne supplements clinically Reviewed 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. ## 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 | | Country Of Origin | USA | | Item Model Number | SB335 | | Manufacturer | Thorne Research | | Product Dimensions | 5.31 x 5.31 x 9.45 cm; 58.97 g | ## Product Details - **Brand:** THORNE - **Diet type:** Gluten Free - **Flavour:** Unflavored - **Item dimensions L x W x H:** 5.3 x 5.3 x 9.4 centimeters - **Item form:** Capsule - **Item weight:** 59 g - **Primary supplement type:** Quercetin - **Product benefits:** Immune Support - **Special ingredients:** All Natural - **Unit count:** 60 Count ## Images ![Quercetin Phytosome, Highly Bioavailable Quercetin, 60 Capsules | Supports Seasonal Immune Function, Respiratory Tract Health & Healthy Aging, Antioxidant Support, NSF Contents Certified - Image 1](https://m.media-amazon.com/images/I/61GrxBw+PwL.jpg) ## Questions & Answers **Q: What makes Thorne supplements high quality?** A: 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. **Q: How does Thorne test its supplements for quality?** A: 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 produce. 100+ Thorne employees are dedicated to ensuring quality. **Q: Are Thorne supplements clinically Reviewed and safe?** A: 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. **Q: Why are Thorne products more expensive than other supplements?** A: 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. **Q: Where are Thorne supplements made and where are the ingredients sourced from?** A: 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. ## Customer Reviews ### ⭐⭐⭐⭐⭐ مميز *by on Reviewed in the United Arab Emirates 7 June 2026* ممتاز ### ⭐⭐⭐⭐⭐ Boosted immunity *by on Reviewed in the United Arab Emirates 27 August 2023* Great supplement. Allergies (nasal) vanished and no side effects. Helped me get over colds n coughs quicker. A super natural antihistamine and anti-inflammatory 🙌. ### ⭐⭐⭐ I don’t see the difference *by on Reviewed in the United Arab Emirates 18 May 2024* I was taking this for my allergies and I don’t see any difference… I got on to antibiotics to reduce my allergies. But maybe a continued use of this supplement before the allergy season might help. ## 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.hr/products/253255844-quercetin-phytosome-highly-bioavailable-quercetin-60-capsules-supports-seasonal-immune](https://www.desertcart.hr/products/253255844-quercetin-phytosome-highly-bioavailable-quercetin-60-capsules-supports-seasonal-immune) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-08-23*