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Thorne

Quercetin Phytosome, 60 Capsules (250 mg per Capsule)

4.8 · 2902 reviews
4,885 ₽

Dietary Supplement Respiratory Support Foundational Gluten Free Give your immune system an advantage with the optimized, plant-based antioxidant support of quercetin. As a powerhouse antioxidant, Quercetin Phytosome benefits an optimized immune response, offers support for allergy sufferers, and promotes a healthy aging process for well-rounded daily wellness support.

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Dietary Supplement Respiratory Support Foundational Gluten Free Give your immune system an advantage with the optimized, plant-based antioxidant support of quercetin. As a powerhouse antioxidant, Quercetin Phytosome benefits an optimized immune response, offers support for allergy sufferers, and promotes a healthy aging process for well-rounded daily wellness support.

Customer reviews

5.0
verified purchase
Helped me a lot with MCAS but made me constipated

It's significantly reduced my histamine levels (a lot of thoughts, tinnitus, internal tremors within the body and more symptoms), its only downside is that it made the itching in the skin and the constipation worse, I don't know, maybe the body needs more time to adapt to low levels of histamine.

3/25/2025
5.0
verified purchase

Quercetin reduces inflammation, oxidative stress, and supports healthy endothelial function. Clinical trials reported reductions in uric acid and triglycerides in metabolically compromised adulIts. I strongly recommand to choose phytosome formulation when you looking for enhanced bioavailability of antioxidants.

8/29/2025
5.0
verified purchase

Thorne, Quercetin Phytosome, 60 Capsules (250 mg per Capsule) - 8.0 stars Introduction & context: Quercetin, a flavonoid with antioxidant and anti-inflammatory properties, is often marketed for immune support and allergy relief. This product uses the phytosome technology to enhance bioavailability, binding quercetin to phosphatidylcholine. Each capsule delivers 250 mg at $0.83 per serving. Third-party testing by NSF ensures purity and label accuracy. Evidence summary: Several RCTs (n=50-150) show quercetin’s modest benefits in reducing blood pressure (mean reduction: -3.9 mmHg systolic, -2.1 mmHg diastolic) and inflammation markers (hs-CRP: -0.4 mg/L). Phytosome formulation may improve absorption (AUC0-24: ~2x higher than standard quercetin), though direct comparisons are limited. Limitations include small sample sizes and short durations (4-12 weeks). Formulation & quality analysis: Quercetin phytosome (250 mg) is appropriately dosed based on human trials. Phytosome technology is a credible bioavailability enhancer. No concerning excipients; NSF testing confirms no contaminants. Safety & interactions: Generally safe; mild side effects include gastrointestinal discomfort. Caution with anticoagulants due to potential bleeding risks. Limited data in pregnancy/lactation. Value & practicality: Cost per effective dose is reasonable for bioavailability benefits. Alternatives like standard quercetin with bromelain may offer similar immune support at lower cost. Overall verdict + score: Strong evidence supports quercetin’s role in cardiovascular health and inflammation, with enhanced absorption via phytosome technology. Thorne’s product is clean and reliable. Worth considering for those prioritizing bioavailability. Who it's for: Individuals with hypertension or elevated inflammation seeking evidence-based support. Not essential for healthy adults. I’d consider it if bioavailability issues were a concern, but would also explore standard quercetin + bromelain combinations.

2/15/2026
5.0
verified purchase
A very useful product

This product is very good for the immune system. I have personally noticed that it is also useful for mild allergies. THorne uses ingredients of the highest quality, the capsules are small in size and do not have an unpleasant taste. I used the recommended dosage and noticed very good results.

2/19/2025
5.0
verified purchase
Quite good

Good supplement, but for allergies I would recommend the same version but the complex with bromelain. This one alone isn’t enough to deal with strong allergies.

4/15/2026
5.0
verified purchase
Great

Great product. Clean ingredients and good quality. Will be buying again

4/2/2026
5.0
verified purchase
High-quality quercetin

This quercetin is excellent and it was specifically recommended by my doctor. The ingredients are clean, the capsule size is easy to take, and the phytosome form makes the absorption noticeably better. With the recommended dosage, I felt real benefits for inflammation and histamine balance, especially on days when my sensitivity is higher. Reliable quality, and one of the few formulas that actually makes a difference for me.

12/1/2025
5.0
verified purchase
great for senolytic pulses, use high dosage

This supplement is a great addition to my daily routine. The capsules are small, easy to swallow, and completely odorless—no unpleasant taste or aftertaste. The dosage is convenient, and I appreciate that it’s free from unnecessary additives. I’ve noticed a positive difference since taking it consistently, with no digestive discomfort or side effects. The bottle is sturdy, and the seal keeps the contents fresh. Shipping was fast, and the product arrived well-packaged. Overall, it’s a high-quality, effective supplement that does what it claims without any fuss. I’d definitely recommend it to others looking for a reliable option.

11/17/2025
5.0
verified purchase
최고!

Quality is super! The ingredients are great! Size arranged! What you need! Performance is felt! the product arranged, perfectly packed, the effect is definitely there! I will order more! Just as quickly delivered

11/13/2025
5.0
verified purchase
good quality

take this when feeling unwell, not regularly. it has good science to support it for that use. quality seems good and no issues with packaging.

11/10/2025