








🛡️ Elevate your immune game with nature’s most bioavailable defense!
THORNE Quercetin Phytosome is a premium antioxidant supplement featuring a patented phytosome complex that enhances quercetin absorption by 20 times. Designed for year-round immune support, respiratory health, and seasonal allergy relief, it harnesses potent flavonoids from Sophora japonica flowers. Third-party tested and trusted by elite athletes and healthcare pros, this clean, allergen-free formula helps regulate histamine and oxidative stress, promoting balanced inflammation and cellular protection.















| 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 | #7,118 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 (2,307) |
| 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 | 2.08 ounces |
| Item model number | SB335 |
| Manufacturer | Thorne Research |
| Manufacturer | Thorne Research |
| Model Name | 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 |
S**Y
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.
B**E
It is a high-quality product.
High quality product. It's having an effect on me. After finishing one bottle, I bought a second one.
R**K
Been using since covid
Works as advertised Reliable brand.
G**P
Great quality
Thorne makes a great product.
S**M
Great product
Really like this brand.
@**H
good product
good product
M**T
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.
T**8
Works!
No more nightly hives!! I just hate I have to take another supplement until I figure out what is going on when I don’t take it.
J**Y
Excellent product
J**Y
I'm a long-perm consumer of anti-depressant and anti-enxiety meds. This Thorne product appears to have have given me the boost that prescription meds cannot match. Such has been the positive change in the six weeks since I began taking it, I am reluctant to put it all down to Quercetin, but I haven't had a single bad day since starting them. Before this, I rarely had a good day. I will update in a few months.
A**!
Great supplement. Allergies (nasal) vanished and no side effects. Helped me get over colds n coughs quicker. A super natural antihistamine and anti-inflammatory 🙌.
A**R
This is Thorne's version of liposomal quercetin and it does work if you take two capsules four times a day for your MCAS, but I can't afford it. Other products called "liposomal" do the same thing.
P**Y
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.
Trustpilot
1 week ago
3 weeks ago