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Natural Factors, Quercetin, Bioflavonoid Complex, 90 Capsules

$17.47 $17.47 (Saved $7.48)

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Natural Factors, Quercetin, Bioflavonoid Complex, 90 Capsules

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Natural Factors, Quercetin, Bioflavonoid Complex, 90 Capsules

In Stock
  • Expiration Date: August 2020
  • Shipping Weight:
    0.24 lbs
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  • Product Code: NFS-01387
  • UPC Code: 068958013879
  • Package Quantity: 90 Capsules
  • Dimensions:
    2.2 x 2.2 x 4.3 in, 0.2 lbs
    Switch to Metric units

Product Rank:

#20 in Quercetin >
Frequently Purchased Together
Product Overview


  • Dietary Supplement
  • Easy to Swallow Capsules
  • Support for the Body's Use of Vitamin C
  • Purity & Potency Guaranteed

Natural Factors Quercetin capsules are enhanced with Citrus Bioflavonoids, Bromelain and Rutin. Quercetin, a popular bioflavonoid, is essential to optimize the body's use of Vitamin C. Bioflavonoids are brightly-colored substances that are found in fruits and vegetables, typically as companions to Vitamin C.

Bioflavonoids are essential for proper absorption of Vitamin C and have been shown to have antioxidant properties, increase capillary strength and keep collagen healthy.

Suggested Use

1 capsule, 1-3 times per day or as directed by a health professional.

Other Ingredients

Gelatin capsule (gelatin, purified water), rice flour, magnesium stearate (vegetable grade), silicon dioxide.

All Natural Factors products are manufactured in accordance with the Government of Canada's Good Manufacturing Practices (GMP), among the highest standards in the world.

Contains no artificial preservatives, color or sweeteners; no dairy, soy, starch, wheat or yeast.


Keep out of reach of children.

Sealed for your protection. Do not use if seal is broken. For freshness, store in a cool, dry place.


While iHerb strives to ensure the accuracy of its product images and information, some manufacturing changes to packaging and/or ingredients may be pending update on our site. Although items may occasionally ship with alternate packaging, freshness is always guaranteed. We recommend that you read labels, warnings and directions of all products before use and not rely solely on the information provided by iHerb.
Supplement Facts
Serving Size: 1 Capsule
  Amount Per Serving % Daily Value
Total Carbohydrate <1 g <1%**
Quercetin 235 mg
Citrus Bioflavonoid (from citrus peels) 235 mg
Bromelain 1000 GDU (from pineapple stems) 45 mg
Rutin 45 mg
** Percent Daily Values are based on 2,000 calorie diet.
† Daily Value not established.
iHerb Customer Reviews


Posted by iHerb Customer on November 29 2017 | Verified Purchase

Exellent product!

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helps reduce allergies

Posted by freeradicle on October 15 2017 | Verified Purchase

This is a good combination of quercetin and bioflavonoids, together with a small amount of rutin and bromelain. It helps reduce allergies. If it is taken with a vitamin C supplement, it helps the absorption and metabolism of the vitamin C.

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Helped with my BPA fillings

Posted by Kittyhearsawho on January 23 2014 | Verified Purchase

I bought this for my son's sinus issues, for which it works very well. I started using it recently after a trip to the dentist. I needed two fillings and avoided the amalgams because of the mercury and opted for composites instead. I started feeling unwell a few days later and my filled teeth felt like they were tingling for the next two weeks. I did some research as I wondered if I was slightly allergic to the fillings. What I found out was, that the white composite fillings contain BPA!!! I started researching what to do and found that quercetin pulls BPA out of the body. I took one, and with half an hour felt better than I had in weeks. I am taking four a day until I work out what to do, but finally i'm at least feeling normal again. If you need a filling, make sure you insist that the dentist use BPA free composites!!! I've learned the hard way.

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I have not noticed any effect from using it.

Posted by iHerb Customer on October 6 2013 | Verified Purchase

It is supposed to help with eye bags, but I have been taking it for a month and I have not noticed any effect. I also do not feel it helps with my sinus problems.

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don't know yet

Posted by iHerb Customer on October 30 2012 | Verified Purchase

they get a high rating cuz I'm hoping for the best.

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