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🛡️ Elevate your defense with nature’s most bioavailable antioxidant!
THORNE Quercetin Phytosome is a premium antioxidant supplement delivering a 20-times more bioavailable plant flavonoid to support immune health, respiratory function, and seasonal allergy relief. Third-party certified and free from common allergens, it’s trusted by elite athletes and healthcare pros alike for clean, effective immune and inflammation support.

















| 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 | #7,364 in Health & Household ( See Top 100 in Health & Household ) #23 in Polyphenol Antioxidant Supplements |
| Brand | THORNE |
| Brand Name | THORNE |
| Container Type | Bottle |
| Customer Reviews | 4.7 out of 5 stars 2,366 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 |
K**R
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.
L**D
Allergy relief
Helps my allergies! I use daily during allergy season and I don't have to take medication
J**A
Absolute best!
Love this manufacturer and this product works the best for me. I cannot afford it any longer though.
A**R
A product for all households
After 24 hours of use I felt great again.
G**E
Dr recommended
Dr said it’s one of the cleanest on market
Z**A
Cell boost
These are good. Just wish they had an enzyme formula. So I use them in rotation with Doug Labs
B**Z
No achoo
I take this for seasonal allergies. It works well for me
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.
J**Y
Very good product
Excellent product
A**D
مميز
ممتاز
N**N
Great stuff
Ok so my histamine levels were over 7867 in highest ref range 959 /7 times the norm basically/. The bloating was one thing, but every morning I felt like I have something stuck in my throat that I desperately want to caugh out, but couldn’t. ChatGpt told me to get Quercitin and Vitamin C. I’ve heard about this brand Thorne that athletes use so even tho more expensive than other brands - I gave it a try. Long and behold the sensation in the throat IS GONE. I don’t know the histamine levels, but it is obvious this works
A**R
Good but pricey
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.
J**Y
Life Changing?
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.
Trustpilot
2 weeks ago
3 weeks ago