---
product_id: 253255844
title: "Quercetin Phytosome - Antioxidant Supplement for Immune Health, Respiratory Support & Seasonal Allergy Relief - Third-Party Certified - Gluten, Dairy & Soy-Free - 60 Capsules - 60 Servings"
brand: "thorne"
price: "$102.13"
currency: USD
in_stock: true
reviews_count: 8
category: "Thorne"
url: https://www.desertcart.us/products/253255844-quercetin-phytosome-antioxidant-supplement-for-immune-health-respiratory-support-seasonal
store_origin: US
region: United States of America
---

# Pure Sophora japonica extract Third-party certified purity 20x bioavailability boost Quercetin Phytosome - Antioxidant Supplement for Immune Health, Respiratory Support & Seasonal Allergy Relief - Third-Party Certified - Gluten, Dairy & Soy-Free - 60 Capsules - 60 Servings

**Brand:** thorne
**Price:** $102.13
**Availability:** ✅ In Stock

## Summary

> 🛡️ Elevate your immunity game with nature’s most bioavailable antioxidant!

## Quick Answers

- **What is this?** Quercetin Phytosome - Antioxidant Supplement for Immune Health, Respiratory Support & Seasonal Allergy Relief - Third-Party Certified - Gluten, Dairy & Soy-Free - 60 Capsules - 60 Servings by thorne
- **How much does it cost?** $102.13 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/253255844-quercetin-phytosome-antioxidant-supplement-for-immune-health-respiratory-support-seasonal)

## 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

- • **Trusted by Champions:** Endorsed by 100+ pro sports teams and top healthcare practitioners for elite wellness.
- • **Immune Armor All Year:** Supports balanced histamine release for resilient immunity through every season.
- • **Plant-Powered Potency:** Harnesses a 20x more absorbable quercetin phytosome for maximum antioxidant impact.
- • **Respiratory Relief Ready:** Maintains normal inflammatory response to keep your breathing smooth and clear.
- • **Clean & Certified Confidence:** Third-party tested to guarantee purity, potency, and zero contaminants.

## Overview

THORNE Quercetin Phytosome delivers a clinically advanced, 20-times more bioavailable form of quercetin extracted from Sophora japonica flowers. Designed to support immune health, respiratory function, and seasonal allergy relief, this third-party certified supplement is free from gluten, dairy, and soy. Trusted by professional athletes and healthcare experts alike, it offers 60 potent capsules for daily antioxidant and inflammation management.

## Description

Best Sellers Visit the store Best Sellers Visit the store Sports Performance Visit the store Sports Performance Women's Health Visit the store Women's Health

Review: مميز - ممتاز
Review: Boosted immunity - Great supplement. Allergies (nasal) vanished and no side effects. Helped me get over colds n coughs quicker. A super natural antihistamine and anti-inflammatory 🙌.

## 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 | #6,668 in Health ( See Top 100 in Health ) #56 in Antioxidant Supplements |
| Brand | THORNE |
| Brand Name | THORNE |
| Color | red |
| Container Type | Bottle |
| Country of Publication | USA |
| Customer Reviews | 4.7 out of 5 stars 2,243 Reviews |
| Diet Type | Gluten Free |
| Dosage Form | Capsules |
| Flavor | Unflavored |
| Flavour | Unflavored |
| Item Dimensions | 5.3 x 5.3 x 9.4 centimeters |
| Item Form | Capsule |
| Item Weight | 0.13 Pounds |
| Item form | Capsule |
| Item weight | 0.13 Pounds |
| Manufacturer | Thorne Research |
| Manufacturer Part Number | SB335 |
| Material Features | Gluten Free, Soy Free |
| Material Type Free | en_AE |
| Model Name | SB335 |
| Model Number | SB335 |
| Number of Items | 1 |
| Primary Supplement Type | Quercetin |
| Primary supplement type | Quercetin |
| Product Benefits | Antioxidant, Immune Support, Inflammation Management, Respiratory Health Support |
| Special Ingredients | All Natural |
| Specific Uses For Product | Laboratory |
| UPC | 693749004356 |
| Unit Count | 60 Count |
| Unit count | 60 Count |

## 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 - Antioxidant Supplement for Immune Health, Respiratory Support & Seasonal Allergy Relief - Third-Party Certified - Gluten, Dairy & Soy-Free - 60 Capsules - 60 Servings - 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 A***D on 7 June 2026*

ممتاز

### ⭐⭐⭐⭐⭐ Boosted immunity
*by A***! on 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 P***Y on 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.us/products/253255844-quercetin-phytosome-antioxidant-supplement-for-immune-health-respiratory-support-seasonal](https://www.desertcart.us/products/253255844-quercetin-phytosome-antioxidant-supplement-for-immune-health-respiratory-support-seasonal)

---

*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-07-12*