---
product_id: 63589915
title: "Quercetin Phytosome - Exclusive Phytosome Complex for Immune Health, Respiratory Support & Seasonal Allergy Relief* - 60 Servings"
brand: "thorne"
price: "€ 87.16"
currency: EUR
in_stock: true
reviews_count: 8
category: "Thorne"
url: https://www.desertcart.sk/products/63589915-quercetin-phytosome-exclusive-phytosome-complex-for-immune-health-respiratory-support
store_origin: SK
region: Slovakia
---

# Sophora japonica flavonoid power Third-party tested purity 20x bioavailability boost Quercetin Phytosome - Exclusive Phytosome Complex for Immune Health, Respiratory Support & Seasonal Allergy Relief* - 60 Servings

**Brand:** thorne
**Price:** € 87.16
**Availability:** ✅ In Stock

## Summary

> 🛡️ Elevate your immune game with nature’s most bioavailable defense!

## Quick Answers

- **What is this?** Quercetin Phytosome - Exclusive Phytosome Complex for Immune Health, Respiratory Support & Seasonal Allergy Relief* - 60 Servings by thorne
- **How much does it cost?** € 87.16 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/63589915-quercetin-phytosome-exclusive-phytosome-complex-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

- • **Immune Armor All Year:** Supports balanced immune response and regulates histamine for seasonal relief
- • **Clean & Pure Confidence:** Third-party certified, allergen-free, and free from contaminants for peace of mind
- • **Oxidative Stress Shield:** Neutralizes free radicals to protect cells and slow aging
- • **Plant-Powered Precision:** Exclusive phytosome complex delivers quercetin 20x more effectively than standard formulas
- • **Clinically Trusted Quality:** Chosen by 100+ pro sports teams and top healthcare practitioners worldwide

## Overview

THORNE Quercetin Phytosome is a premium antioxidant supplement featuring a unique phytosome complex that enhances quercetin absorption by 20 times. Designed for adults seeking robust immune support, respiratory health, and seasonal allergy relief, it harnesses potent flavonoids from Sophora japonica. Third-party tested and trusted by elite athletes and healthcare professionals, this clean, allergen-free formula helps regulate histamine, maintain normal inflammatory responses, and combat oxidative stress for overall wellness.

## Description

Buy THORNE - Quercetin Phytosome - Exclusive Phytosome Complex for Immune Health, Respiratory Support & Seasonal Allergy Relief* - 60 Servings on desertcart.com ✓ FREE SHIPPING on qualified orders

Review: These were exactly what I needed after 5 months of torture - My eustachian tubes have been full of velcro/rice krispie sounds for 5 months. It distorted sounds and the crackling noises every time I yawned or swallowed was so maddening. Learned there was an inflammation in the narsopharynx and now my eosinophils were chaotic and wouldn't calm and kept re-inflaming tissue on their own. I learned that quercetin inhibits the eosinophils so they can "realize" that there is nothing no longer wrong and go back to my normal range. After two weeks of use FINALLY the tube blockage dissipated and function nearly as they should since the eosinophils are finally chilling out and going back to normal numbers. I am nearly recovered and no longer hear crackling in my ears. BLESS THESE PILLS.
Review: Can’t go wrong with Thorne. - It’s hard to say, cause I’m taking so many supplements, but anything by Thorne is top quality.

## 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 | #6,902 in Health & Household ( See Top 100 in Health & Household ) #25 in Polyphenol Antioxidant Supplements |
| Brand | THORNE |
| Brand Name | THORNE |
| Container Type | Bottle |
| Customer Reviews | 4.7 out of 5 stars 2,290 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 | 2.08 ounces |
| Manufacturer | Thorne Research |
| Model Name | 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 |

## Images

![Quercetin Phytosome - Exclusive Phytosome Complex for Immune Health, Respiratory Support & Seasonal Allergy Relief* - 60 Servings - Image 1](https://m.media-amazon.com/images/I/71aVcjDhxaL.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

### ⭐⭐⭐⭐⭐ These were exactly what I needed after 5 months of torture
*by S***Y on November 20, 2025*

My eustachian tubes have been full of velcro/rice krispie sounds for 5 months. It distorted sounds and the crackling noises every time I yawned or swallowed was so maddening. Learned there was an inflammation in the narsopharynx and now my eosinophils were chaotic and wouldn't calm and kept re-inflaming tissue on their own. I learned that quercetin inhibits the eosinophils so they can "realize" that there is nothing no longer wrong and go back to my normal range. After two weeks of use FINALLY the tube blockage dissipated and function nearly as they should since the eosinophils are finally chilling out and going back to normal numbers. I am nearly recovered and no longer hear crackling in my ears. BLESS THESE PILLS.

### ⭐⭐⭐⭐⭐ Can’t go wrong with Thorne.
*by M***T on January 21, 2026*

It’s hard to say, cause I’m taking so many supplements, but anything by Thorne is top quality.

### ⭐⭐⭐⭐⭐ Been using since covid
*by R***K on December 21, 2025*

Works as advertised Reliable brand.

## 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 Slovakia*
*Store origin: SK*
*Last updated: 2026-02-01*