---
product_id: 63589915
title: "Quercetin Phytosome - Antioxidant Supplement for Immune Health, Respiratory Support & Seasonal Allergy Relief* - Third-Party Certified - Gluten, Dairy & Soy-Free - 60 Capsules"
brand: "thorne"
price: "2676621₫"
currency: VND
in_stock: true
reviews_count: 13
category: "Thorne"
url: https://www.desertcart.vn/products/63589915-quercetin-phytosome-antioxidant-supplement-for-immune-health-respiratory-support-seasonal
store_origin: VN
region: Vietnam
---

# Sophora japonica flavonoid power 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

**Brand:** thorne
**Price:** 2676621₫
**Availability:** ✅ In Stock

## Summary

> 🛡️ Elevate your immune 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 by thorne
- **How much does it cost?** 2676621₫ with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/63589915-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

- • **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

Review: Real phytosome, unlike other brands - I bought this brand because it has a license from Indena S.p.A for the phytosome technology whereas most quercetin phytosomes don't and do not have the same absorption. For normal colds, this is probably overkill, but I had a persistent cough from a cold, and I also had inflammation from a slipped rib that simply wouldn't go away after a couple months. I used this since quercetin is a powerful anti-inflammatory (besides being an ionophore), and the inflammation in my ribs was completely gone in two days. Even after the first day of trying it, the pain was about 70% gone. It might be a coincidence, but I was trying all forms of exercise that didn't help. I'm not sure it helped with the cough, which went away slowly.
Review: Great product - It’s a great product that keeps the inflammation in my sinuses down

## 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 | #7,047 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 2,346 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

![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)
![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)
![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)
![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)
![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: 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 manufacture. 100+ Thorne employees are dedicated to ensuring quality.

**Q: Are Thorne supplements clinically tested 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

### ⭐⭐⭐⭐⭐ Real phytosome, unlike other brands
*by K***R on March 23, 2026*

I bought this brand because it has a license from Indena S.p.A for the phytosome technology whereas most quercetin phytosomes don't and do not have the same absorption. For normal colds, this is probably overkill, but I had a persistent cough from a cold, and I also had inflammation from a slipped rib that simply wouldn't go away after a couple months. I used this since quercetin is a powerful anti-inflammatory (besides being an ionophore), and the inflammation in my ribs was completely gone in two days. Even after the first day of trying it, the pain was about 70% gone. It might be a coincidence, but I was trying all forms of exercise that didn't help. I'm not sure it helped with the cough, which went away slowly.

### ⭐⭐⭐⭐⭐ Great product
*by M***A on March 18, 2026*

It’s a great product that keeps the inflammation in my sinuses down

### ⭐⭐⭐⭐⭐ Absolute best!
*by J***A on May 15, 2026*

Love this manufacturer and this product works the best for me. I cannot afford it any longer though.

## 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

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*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-06-09*