30 vegetarian capsules Item # 02302

Bio-Quercetin, 30 vegetarian capsules

Click to Zoom

Bio-Quercetin, 30 vegetarian capsules

Click to Zoom

Thumbnail 1 of 2: Bio-Quercetin, 30 vegetarian capsules
Thumbnail 2 of 2: Bio-Quercetin, 30 vegetarian capsules


30 vegetarian capsules Item # 02302

Bio-Quercetin® uses a quercetin combined with fibers from fenugreek seeds to increase bioavailability. The result: a science-based quercetin supplement that far outclasses standard quercetin formulations.

Gluten free Non-GMO Vegetarian
Always get the lowest price
Learn More
AutoShip Price: $8.00
Save 11%
$0.27/count | 30 Day Supply

First shipment within 1 business day with FREE standard shipping.

SALE: $9.00
Save 0%
$0.30 / count | 30 Day Supply

I’ve used Quercetin for a number of years.


I really like this product.


Frequently Bought Together

  • This Item: Bio-Quercetin, 30 vegetarian capsules
  • Bio-Fisetin, 30 vegetarian capsules

Total Price:



30 vegetarian capsules


$0.30/count | 30 Day Supply

What Is Bio-Quercetin?

Quercetin encourages heart health and supports a healthy immune response. But like many phytonutrients, quercetin isn’t easy to absorb. So we combined quercetin with fenugreek seed fibers to enhance "free" quercetin up to 18x (with up to 62x better total bioavailability) over standard quercetin formulas.

Looking for a quercetin supplement? Take the one that’s up to 62x more bioavailable. Now that’s a healthy decision!

Bio-Quercetin® Benefits

  • Delivers 18x more bioavailable free quercetin (up to 62x better total bioavailability)*
  • Promotes immune, cardiovascular & endothelial health
  • Helps protect against oxidative stress & supports a healthy inflammatory response

*Than unformulated quercetin formulas


Quercetin: Uncommonly good for you

Looking to give your health regimen a boost? Add quercetin. This flavonoid from plants helps maintain already-healthy blood pressure by promoting endothelial health and supports your immune system’s ability to fight off both seasonal and yearlong challengers. Plus, it’s good at neutralizing free radicals before they cause oxidative stress. And our ultra-bioavailable formula makes sure your body absorbs these remarkable benefits.

Clinically Studied for Greater Bioavailability

In a randomized clinical study, researchers compared the formulated Bio-Quercetin to unformulated quercetin. They found that the quercetin formulated with fenugreek fibers led to serum levels of total quercetin up to 62 times higher than unformulated quercetin, and 18 times higher levels of free (unconjugated) quercetin.1

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

Serving Size 1 vegetarian capsule

Amount Per Serving

Bio-Quercetin® Proprietary Blend

30 mg

providing 35% quercetin (10 mg) [from Japanese sophora concentrate (flower bud)], 30% galactomannans (8 mg) [from fenugreek (seed)]  

Other ingredients: microcrystalline cellulose, vegetable cellulose (capsule), vegetable stearate, sunflower lecithin, silica, sunflower oil.


Dosage and Use
  • Take one (1) capsule daily, or as recommended by a healthcare practitioner.
  • Do not purchase if outer seal is broken or damaged.
  • When using nutritional supplements, please consult with your physician if you are undergoing treatment for a medical condition or if you are pregnant or lactating.

To report a serious adverse event or obtain product information, contact 1-866-280-2852.

Actual Size

Pill Size
  1. ACS Omega. 2022;7(50):46825-46832.
  2. J Nutr. 2015;145(7):1459-63.
  3. Nutr Rev. 2020;78(8):615-626.
  4. Crit Rev Food Sci Nutr. 2020;60(11):1855-1868.
  5. Nutrients. 2020;12(9).
  6. Pharmacol Res. 2010;62(3):237-42.

Product reviews are provided for informational purposes only and reflect solely the views and opinions expressed by the contributors and not those of Life Extension. We do not verify or endorse any claims made in these reviews. Full product reviews disclaimer



What are the best immune support supplements for you?

Related Products