#
 
Product Search 
 
Client Login 
Email Address
Your Password
Forgot your password?
click here
 
Create an account
click here to create an account.

You guys are very good at processing orders quickly and shipping it fast. I def. appreciate that. Thank you.

Rolando G.

Quercetin

Quercetin is a flavonoid and more specifically a flavonol. It is the aglycone form of a number of other flavonoid glycosides, such as rutin and quercitrin found in citrus fruit. Quercetin (see FRS Energy Products Here) is found to be the most active of the flavonoids in studies,[citation needed] and many medicinal plants owe much of their activity to their high quercetin content. Quercetin has demonstrated significant anti-inflammatory activity because of direct inhibition of several initial processes of inflammation. For example, it inhibits both the manufacture and release of histamine and other allergic/inflammatory mediators. In addition, it exerts potent antioxidant activity and vitamin C-sparing action.

Quercetin forms the glycosides quercitrin and rutin together with rhamnose and rutinose respectively.

Quercetin also shows remarkable anti-tumour properties. A recent study in the British Journal of Cancer shows that when treated with a combination of quercetin and ultrasound at 20 KHz for 1 minute duration, skin and prostate cancers show a 90% mortality within 48 hours with no visible mortality of normal cells.[1] Note that ultrasound also promotes topical absorption by up to 1,000 times making the use of topical quercetin and ultrasound wands an interesting proposition.

Quercetin may have positive effects in combating or helping to prevent cancer, prostatitis, heart disease, cataracts, allergies/inflammations, and respiratory diseases such as bronchitis and asthma.

Foods rich in quercetin include capers(1800mg/kg)[2], lovage(1700mg/kg), apples, tea (Camellia sinensis), onions (higher concentrations of quercetin occur in the outermost rings[3]), red grapes, citrus fruits, broccoli & other leafy green vegetables, cherries, and a number of berries including raspberry, bog whortleberry (158 mg/kg, fresh weight), lingonberry (74 and 146 mg/kg), cranberry (83 and 121 mg/kg), chokeberry (89 mg/kg), sweet rowan (85 mg/kg), rowanberry (63 mg/kg), sea buckthorn berry (62 mg/kg), crowberry (53 and 56 mg/kg),[4] and the fruit of the prickly pear cactus. A study[5] by the University of Queensland, Australia, has also indicated the presence of quercetin in varieties of honey, including honey derived from eucalyptus and tea tree flowers.[6]

In plants, it is a naturally-occurring polar auxin transport inhibitor.

^ (2005) "Induction of cancer-specific cytotoxicity towards human prostate and skin cells using quercetin and ultrasound". British Journal of Cancer 92 (3): 499-502. DOI:10.1038/sj.bjc.6602364. Retrieved on 2007-5-19. 
^ USDA Database for the Flavonoid Content of Selected Foods
^ Crystal Smith, Kevin A. Lombard, Ellen B. Peffley, Weixin Liu (2003). "Genetic Analysis of Quercetin in Onion (Allium cepa L.) Lady Raider". The Texas Journal of Agriculture and Natural Resource 16: 24-28. 
^ Sari H. Häkkinen et al (1999). "Content of the Flavonols Quercetin, Myricetin, and Kaempferol in 25 Edible Berries". Journal of Agricultural and Food Chemistry 47 (6): 2274 -2279. DOI:S0021-8561(98)01106-6 10.1021/jf9811065 S0021-8561(98)01106-6. PMID 10794622. Retrieved on 2007-06-13. 
^ [1]
^ honey fingerprinting
^ Shoskes, DA et al (1999). "Quercetin in men with category III chronic prostatitis: a preliminary prospective, double-blind, placebo-controlled trial.". Urology. 54 (6). 

Resources for Today's Endurance Athletes ®

Copyright © 2017-2018 ProLine Sports Nutrition, Inc. ®
Email Customer Care

Disclaimer: While we work to ensure that product information is correct, on occasion manufacturers may alter their ingredient lists. Actual product packaging and materials may contain more and/or different information than that shown on this website. We recommend that you do not solely rely on the information presented and that you always read labels, warnings, and directions before using or consuming a product. For additional information about a product, please contact the manufacturer. Content on this Website is for reference purposes and is not intended to substitute for advice given by a physician, pharmacist, or other licensed health-care professional. You should not use this information as self-diagnosis or for treating a health problem or disease. Contact your health-care provider immediately if you suspect that you have a medical problem. Information and statements regarding dietary supplements have not been evaluated by the Food and Drug Administration and are not intended to diagnose, treat, cure, or prevent any disease or health condition. ProLine Sports Nutrition, Inc. ®