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Thorne   Quercetin Phytosome - 60 Capsules

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10 Reviews

"Recommended by my doctor"  Read all reviews

Item Number: TR1403
Serving Size: 1 Capsule Servings per Container: 60
Price per Serving:  $0.63 Price per Unit*: $0.63 per Capsule
* Price Per Unit may reflect product's price per capsule, tablet, ounce, fluid ounce, etc.
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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.*

Quercetin is a type of plant compound called a flavonoid (a fancy name for a plant pigment) that contributes to the natural‚ vibrant colors of fruits and vegetables like apples‚ onions‚ berries‚ and tea. Flavonoids function as antioxidants‚ seeking out damaging free radicals and neutralizing them.* Free radicals are caused by the daily oxidative stress placed on our bodies‚ and they are linked to cellular damage‚ accelerated aging‚ and chronic health conditions.

Thorne’s Quercetin Phytosome offers the antioxidant benefits of a flavonoid‚ as well as its immune-supporting properties and the ability to support a healthy inflammatory response‚ which provides a range of health-promoting benefits.*

As a natural compound‚ quercetin is typically characterized by poor absorption into the bloodstream‚ which is why the quercetin used in Thorne products is provided as a quercetin phytosome. A quercetin phytosome complex enhances the benefits of quercetin by utilizing phytosome technology to optimize the nutrient’s bioavailability. Thorne’s Quercetin Phytosome is up to 20 times more bioavailable than quercetin extract alone‚ for maximum benefit from a smaller amount.*

Who can benefit from Quercetin Phytosome

• Anyone looking to support healthy immune function*
• Individuals seeking support from the effects of seasonal allergies or hives*
• Those looking to promote recovery and a healthy inflammatory response in the respiratory tract*
• Biohackers looking to optimize sirtuin function and decrease senescent cells*
• Anyone wanting to support a healthy aging process*

Immune and Allergy Support

Quercetin Phytosome offers a range of benefits for immune health – from general immune support‚ to nutritional support for seasonal allergy sufferers‚ to maintenance of a healthy respiratory tract.* Quercetin plays a crucial role in moderating immune function through several different actions‚ such as:

• Supporting various types of immune cells that are necessary for an optimized immune response*
• Benefiting allergy sufferers by helping to regulate histamine release*
• Helping to support a normal inflammatory response‚ particularly in the respiratory tract*

Unique Benefits for Healthy Aging

Cutting-edge research is placing quercetin in the spotlight for healthy aging because of new research that shows quercetin helps reduce cellular senescence.* Senescent cells are malfunctioning cells that have stopped dividing but do not die and remain in the body. Environmental factors‚ along with regular aging‚ causes a buildup of senescent cells‚ which can be associated with biological aging and age-related disorders.

What makes Quercetin Phytosome a healthy aging superstar:

• Quercetin is one of only two nutrients that have been studied to reduce cellular senescence*
• Quercetin up-regulates sirtuins (key regulators of cellular health) associated with improved weight-related metabolic factors at the cellular level*
• The trio of antioxidant‚ sirtuin‚ and senescence support helps optimize healthy cellular aging*

These statements have not been evaluated by the Food and Drug Administration (FDA). These products are not meant to diagnose‚ treat or cure any disease or medical condition. Please consult your doctor before starting any exercise or nutritional supplement program or before using these or any product during pregnancy or if you have a serious medical condition.

  • MFG # SB335
  • UPC # 693749004356
Official Website:

Serving Size: One Capsule
Servings Per Container: 60

One Capsule Contains: / %DV

Quercetin Phytosome (Sophora japonica extract (flower) / Phospholipid complex from Sunflower) 250 mg / *

*Daily Value (DV) not established.

Other Ingredients: Leucine‚ Microcrystalline Cellulose‚ Hypromellose (derived from cellulose) capsule‚ Silicon Dioxide.

Gluten Free.

Take 1 capsule two to three times daily with meals or as recommended by your health-care practitioner.

TAMPER EVIDENT: Use only if bottle is sealed. Store tightly sealed in a cool‚ dry place.

If pregnant‚ consult your health-care practitioner before using this product.

  • Egg Free
  • Gluten Free
  • High Fructose Corn Syrup Free
  • Nut Free
  • Peanut Free

Ratings and Reviews

Write a Review
  • 4.9
5 10
  • 10 Reviews
    • Verified Buyer

      keeps me healthy

      from Gastonia, NC on 7/13/2022
      This item keeps me healthy
      review-checkI would recommend this item to a friend.
    • Verified Buyer

      Great Product.

      from PRESCOTT AZ on 12/31/2021
      I just added Quercetin to my weekly regimen. I support Thorne's supplements. They are of high quality.


      It is effective and I had no problem adding it to my daily supplements.


      I have no dislikes.
      review-checkI would recommend this item to a friend.
    • Verified Buyer

      Best Brand to use

      from Lebanon IL on 4/15/2021
      Recommended by my doctor


      It acts like a carrier to bring Zinc into cells


      review-checkI would recommend this item to a friend.
      1 of 1 people found the following review helpful.
    • Verified Buyer

      Trusted brand

      from Wisconsin on 4/02/2021
      This quercetin is from a brand I trust and seems to be doing the job.


      Reputation of company


      review-checkI would recommend this item to a friend.
    • Verified Buyer

      Easy to Use Website

      from UT on 3/03/2021
      The website is straightforward and easy to use.


      Doesn't cause any gastric distress


      A little more expensive than some options
      review-checkI would recommend this item to a friend.
    • Verified Buyer

      Great allergy support

      from WV on 12/20/2020
      I have moderate to severe environmental allergies and food sensitivities, and have been on high dose antihistamines for years. I have been using this product for over a month now and get better relief from my allergies with quercetin than the prescription medications. Highly recommend!




      review-checkI would recommend this item to a friend.
      5 of 5 people found the following review helpful.
    • Verified Buyer


      from Riverview, FL on 6/15/2020
      This works much faster and keeps histamine issues away much longer.
      review-checkI would recommend this item to a friend.
    • Verified Buyer

      High Quality Quercetin

      from Illinois, USA on 3/31/2020
      This is a very trusted brand. High quality and lipodomal too for better absorption!


      Liposomal vs competitors, quality, brand


      A bit pricier than others, but you get what you pay for!
      review-checkI would recommend this item to a friend.
    • Verified Buyer

      Not effective for red, itchy skin

      from Arizona on 9/23/2019
      I had itchy skin that I would scratch and the skin would remain bright red afterwards for hours. I was told my skin cells are releasing too much histamine in response to being scratched. I took this Quercetin in hopes to calm down my reaction but it didn't work.
      2 of 3 people found the following review helpful.
    • Verified Buyer

      Amazing Product!

      from Worcester, MA on 3/04/2018
      I love using Quercetin Phytosome by Thorne Research durning allergy season!


      Highly effective.


      review-checkI would recommend this item to a friend.

Customer Questions and Answers

Please ask any questions you may have about this specific product in the field below.

Your question(s) and our corresponding answer(s) will not be confidential and will be posted publically on this specific product page.

Additionally, PureFormulas is unable to directly recommend products in relation to specific health conditions. Please contact your trusted healthcare practitioner for direct product recommendations.

If you have any general questions regarding orders or our policies and programs, please contact our Customer Happiness Team @ 1.800.383.6008

If you are pregnant, nursing, taking any medications or have any medical condition, consult your doctor before use. Your healthcare professional is the best source for guidance before beginning an exercise or nutritional supplement program.

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

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