Quercetin 500 Plus (Formula)

by Vitabase


  • Exhibits anti-allergy and anti-inflammatory properties
  • Strong antioxidant to remove free radicals
  • Includes Bromelain which improves quercetin’s actions
  • Turmeric provides additional anti-inflammatory support
  • Manganese contributes to the antioxidant MnSOD which may protect joints from arthritis inflammation

Quercetin is an important member of a class of naturally occurring plant pigments known as flavonoids. The distinctive red color of some wines, onions and apples is due to the presence of quercetin. The latter two are particularly rich sources of the compound, as are black and green teas. It is also interesting that quercetin serves as a basic building block for many other members of the flavonoids family.

Along with other antioxidants, quercetin fights the damaging free radical molecules that are a major cause of aging and degenerative disease in modern Western societies.

Several population studies have linked a high intake of quercetin and other flavonoids to a reduced risk of certain disorders. Research results published in Surgery in 2002 showed that the antioxidant activity of quercetin reduces the build up of a key component of atherosclerosis. This supports the findings of a large scale Dutch study of 5,000 adults which linked a high flavonoid intake with a reduced heart attack risk. 

A 2001 study by the prestigious Mayo Clinic found that use of quercetin may be a new breakthrough in the treatment of prostate disorders. A report published in December 2004, showed that quercetin is also effective in treating chronic prostatitis. Lead researcher, Dr. Daniel Shoskes, said, “These impressive findings should offer hope to the millions of men who suffer from this poorly understood and painful condition, as it provides a new option for doctors who've been frustrated by limited treatment choices.”

While numerous studies have been done, more studies are necessary to establish specific health benefits.

Quercetin has been studied scientifically for over 30 years and during that time it has proven to be not only a highly effective natural supplement, but a safe one as well.



Label Information and Ingredients

Suggested Use: As a dietary supplement, adults take one (1) tablet, two (2) times daily with meals, or as directed by a health care professional. Store in a cool, dry place and away from direct light.

Supplemental Facts
Serving Size: 1 Tablet(s)

IngredientsPer Serving% DV
Vitamin C (as ascorbic acid)250 mg   417%
Manganese (as amino acid chelate)10 mg   500%
Quercetin 500 mg   *
Bromelain (Ananas comosus fruit extract) (Standardized to 1800 GDU/g)50 mg   *
Citrus Bioflavonoids 100 mg   *
Turmeric (Curcuma longa rhizome extract) (Standardized to 95% Curcumin)50 mg   *
* Daily Value Not Established


Notes: QUERCETIN 500 PLUS. Vitamin C, bromelain, turmeric, citrus bioflavonoids and manganese work synergistically to enhance the proven benefits of Quercetin.

Other Ingredients: May contain one or more of the following: magnesium stearate, cellulose, modified cellulose gum, vegetable stearin, dicalcium phosphate, silica, and food glaze. Contains soy.


QUALITY AND POTENCY GUARANTEED