---
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: "$96.13"
currency: USD
in_stock: true
category: "Thorne"
url: https://www.desertcart.us/products/63589915-thorne-quercetin-phytosome-antioxidant-supplement-for-immune-health-respiratory-support
store_origin: US
region: United States of America
---

# Regulates seasonal allergies Supports respiratory health Year-round immune defense 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:** $96.13
**Availability:** ✅ In Stock

## Summary

> 🛡️ Elevate your immunity, breathe freely, and own every season!

## 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?** $96.13 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/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

- • **Allergy Ally:** Smart histamine regulation helps you breeze through allergy season without missing a beat.
- • **Age Gracefully:** Powerful antioxidant action combats oxidative stress for vibrant cellular health.
- • **Elite Immune Boost:** Harnesses advanced phytosome tech to supercharge your immune cells for all-season protection.
- • **Breathe Easy Support:** Clinically backed to soothe respiratory inflammation and keep your airways clear.
- • **Clinician & Pro Team Trusted:** Endorsed by 100+ pro sports teams and top healthcare practitioners for unmatched quality.

## Overview

THORNE Quercetin Phytosome is a third-party certified antioxidant supplement designed to support immune function, respiratory health, and seasonal allergy relief. Free from gluten, dairy, and soy, it leverages advanced phytosome technology to enhance absorption and efficacy. Trusted by healthcare professionals and elite sports teams, this 60-capsule formula promotes healthy aging by mitigating oxidative stress and regulating histamine release for comprehensive wellness.

## Description

Buy THORNE - Quercetin Phytosome - Antioxidant Supplement for Immune Health, Respiratory Support & Seasonal Allergy Relief* - Third-Party Certified - Gluten, Dairy & Soy-Free - 60 Capsules on desertcart.com ✓ FREE SHIPPING on qualified orders

## Features

- Immune Function: Provides year-round immune support by promoting various types of immune cells that are necessary for an optimized immune response*
- Respiratory Support: Supports a healthy inflammatory response in the respiratory tract*
- Healthy Aging: Mitigates oxidative stress and supports cellular health*
- Seasonal Allergies: Benefits allergy sufferers by helping to regulate histamine release*
- Trusted: Thorne is trusted by 100+ professional sports teams and the #1 most recommended clinical brand by consumers and health-care practitioners (Based on a 2026 independent survey of US supplement consumers and health-care practitioners)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0797DQTVZ |
| 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 | #7,750 in Health & Household ( See Top 100 in Health & Household ) #26 in Polyphenol Antioxidant Supplements |
| Brand Name | THORNE |
| Container Type | Bottle |
| Customer Reviews | 4.7 4.7 out of 5 stars (2,368) |
| Date First Available  | June 5, 2014 |
| 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 |
| Item model number  | SB335 |
| Manufacturer | Thorne Research |
| 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 |
| Product Dimensions  | 2.09 x 2.09 x 3.72 inches; 2.08 ounces |
| Specific Uses For Product | Immune & Allergy Support |
| UPC | 693749004356 |
| Unit Count | 60 Count |

## Product Details

- **Age Range (Description):** Adult
- **Brand:** THORNE
- **Diet Type:** Gluten Free
- **Flavor:** Unflavored
- **Item Form:** Capsule
- **Item Weight:** 0.13 Pounds
- **Item dimensions L x W x H:** 2.09 x 2.09 x 3.72 inches
- **Primary Supplement Type:** antioxidant supplement
- **Product Benefits:** Immune Support
- **Unit Count:** 60 Count

## 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)

## 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.

## 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 United States of America*
*Store origin: US*
*Last updated: 2026-07-18*