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Natural Factors, Quercetin, Bioflavonoid Complex, 90 Capsules

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In Stock
  • Expiration Date: Jan 2019
  • Shipping Weight: 0.24 lbs (0.11 kg)
  • Product Code: NFS-01387
  • UPC Code: 068958013879
  • Package Quantity: 90 Capsules
  • Dimensions: 2.2 x 2.2 x 4.3 in, 0.2 lbs (0.09 kg)
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.

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

Helped with my BPA fillings

Posted by Kittyhearsawho on Jan 23, 2014

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 Reviewer1199452 on Oct 06, 2013

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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Natural Factors, Quercetin, Bioflavonoid Complex, 90 Capsules

Posted by Reviewer2485668 on Nov 22, 2012

Natural Factors, Quercetin, Bioflavonoid Complex, 90 Capsules

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don't know yet

Posted by Reviewer2062768 on Oct 30, 2012

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

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forget sneezing

Posted by 101010011 on Sep 27, 2012

i originally purchased this quercetin product for the sole use of combating allergy symptoms this year. loaded up on this along with a few thousand milligrams of vitamin c daily, from april to june, and the pollen came and went, and i barely even noticed any discomfort. this bioflavonoid complex is fantastic, with a great list of co-factors on the label, all in well thought out percentages. i will absolutely stock up on these come next year

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