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Topic: Quercetin

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Flavonoid

	eVitamins : Encylopedia : Nutritional Supplements : Quercetin (Site not responding. Last check: 2007-11-05)
		Quercetin is a member of a group of naturally occurring compounds, the flavonoids, which have a common flavone nucleus composed of two benzene rings linked through a heterocyclicpyrone ring.
		Quercetin's anti-inflammatory activity appears to be due to its antioxidant and inhibitory effects on inflammation-producing enzymes (cyclooxygenase, lipoxygenase) and the subsequent inhibition of inflammatory mediators, including leukotrienes and prostaglandins.
		Quercetin was initially discovered in red wine because of its trait as a mutagen (a subtance that mutates cells).
	www.evitamins.com /ency_description.asp?encyclopedia=134&x=21&y=13 (1638 words)

	quercetin (Site not responding. Last check: 2007-11-05)
		Quercetin, which is primarily found in apples, onions, and fl tea, is a type of flavonoid (plant pigment) that serves as a building block for other members of the flavonoid family.
		Quercetin inhibits the buildup of a type of blood sugar that could otherwise lead to cataract formation in the lens of the eye.
		Quercetin may be useful in relieving asthma (and possibly hay fever and sinusitis) as a result of its ability to reduce inflammation in the airways and prevent the release of histamine (which causes congestion).
	www.wholehealthmd.com /refshelf/substances_view/1,1525,10053,00.html (1071 words)

	Quercetin
		Quercetin and its metabolites are distributed from the liver to various tissues in the body.
		Quercetin is one of several flavonoids that have effects on mast cells and basophils; thus, some research suggests, it might be useful in some allergies, such as hay fever.
		Quercetin, a bioflavonoid, inhibits the induction of interleukin 8 and monocyte chemoattractant protein-1 expression by tumor necrosis factor-alpha in cultured human synovial cells.
	www.pdrhealth.com /drug_info/nmdrugprofiles/nutsupdrugs/que_0219.shtml (1888 words)

	Quercetin
		Quercetin absorption can vary, depending on its source.
		Research has been accumulating, and though it is still in its early stages, many people are jumping on the quercetin bandwagon.
		Quercetin is an important member of a large group of plant compounds called flavonoids, once thought to be vitamins.
	www.berkeleywellness.com /html/ds/dsQuercetin.php (469 words)

	CP/CPPS Chronic Prostatitis and Quercetin Primer
		Quercetin is the aglycone (meaning minus the sugar molecule) of a number of other flavonoids, including rutin, quercetrin, isoquercetin, and hyperoside.
		Quercetin exerts antiviral activity against reverse transcriptase of HIV and other retroviruses, and was shown to reduce the infectivity and cellular replication of Herpes simplex virus type 1, polio-virus type 1, parainfluenza virus type 3, and respiratory syncytial virus (RSV).
		Quercetin's inhibition of xanthine oxidase decreases the formation of uric acid, and thus it may be of value in the treatment of gout.
	www.chronicprostatitis.com /qfacts.html (1012 words)

	Quercetin
		Quercetin belongs to a group of plant pigments called flavonoids that are largely responsible for the colors of many fruits, flowers, and vegetables.
		Of note is that quercetin seems to work better when used in conjunction with bromelain, a digestive enzyme found in pineapples, particularly for allergies and inflammation.
		Quercetin and other flavonoids have been shown in animal and test tube studies to inhibit the growth of cancer cells, including those from breast, colon, prostate, and lung tumors.
	www.umm.edu /altmed/ConsSupplements/Quercetincs.html (2142 words)

	Le Magazine, January 2003 - Report: The Quest For A Better Quercetin
		Spanish researchers evaluated the antihypertensive effects of quercetin in an animal model of essential hypertension.9 They discovered that 10 mg/kg of quercetin given orally to spontaneously hypertensive rats for five weeks reduced systolic blood pressure by18%, diastolic blood pressure by 23%, and mean arterial blood pressure by 21%.
		Quercetin was also found to decrease cardiac and renal hypertrophy, both of which follow hypertension and can lead to heart and kidney failure if left unchecked.
		The dosage of quercetin used in this study corresponds (after adjusting for body weight) to the amount that would be consumed by the average adult male who drinks one to two glasses of red wine daily.
	www.lef.org /magazine/mag2003/jan2003_report_quercetin_01.html (1670 words)

	Sloan-Kettering - About Herbs, Botanicals & Other Products: Search About Herbs (Site not responding. Last check: 2007-11-05)
		Quercetin is a flavonol that constitutes the major bioflavonoid sources in the human diet.
		Quercetin is found predominantly in plasma in the form of its conjugates (e.g., quercetin glucuronides and/or sulfates) and small amounts of unconjugated quercetin aglycone.
		Effects of the flavonoids quercetin and apigenin on hemostasis in healthy volunteers: results from an in vitro and dietary supplement study.
	www.mskcc.org /mskcc/html/11571.cfm?RecordID=550&tab=HC (998 words)

	Quercetin
		Quercetin is known to inhibit mast cells from releasing pro-inflammatory compounds that cause allergy symptoms.
		Quercetin was active both when incubated in the culture medium together with hydrogen peroxide, and was also active when the lenses were pre-treated with quercetin prior to oxidative insult.
		Quercetin protected the lens from calcium and sodium influx, which are early events leading to lens opacity, and this implies that the non-selective cation channel is protected by this phenolic.
	freedomantiviral.addr.com /quercetin.htm (5598 words)

	Quercetin--Protect Your Health With This Important Flavonoid
		Quercetin appears to be one of the main keys in cutting the risk of coronary heart disease.
		Quercetin inhibits the infectivity of the herpes virus (J AIlergy Clin Immunol 82; 69:104).
		Quercetin in particular, however, is found at higher levels in grapefruit (particularly the white pulp portion), onions, apples, broccoli, shallots and summer squash.
	www.prohealthnetwork.com /library/showarticle.cfm/id/235/T/Both (1635 words)

	Quercetin Research by Ray Sahelian, M.D., Benefits and Side Effects
		Quercetin exerts antihypertensive effects and reduces left ventricular hypertrophy, endothelial dysfunction, and the plasma and hepatic oxidative status in spontaneously hypertensive rats.
		Quercetin was found in all berries, the contents being highest in 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), and crowberry (53 and 56 mg/kg).
		Co-administration of quercetin with finasteride prevented the finasteride-induced decrease in serum DHT levels but significantly enhanced the reduction in wet prostate weight, which was reduced by 26.9% in finasteride-treated animals to 31.8%, 40.0% and 48.2% after finasteride given together with the three doses of quercetin.
	www.raysahelian.com /quercetin.html (3244 words)

	Quercetin
		Quercetin is a flavonoid—a substance found in fruits, flowers, and vegetables—that, among other functions, gives them their color.
		Allergies, asthma, and hives: Quercetin may inhibit histamine release from basophils (a type of white blood cell) and mast cells (large cells in connective tissue).
		Quercetin may also be beneficial in the treatment of dysentery (an intestinal infection causing severe diarrhea), gout (a disease where crystals of uric acid, a component of urine, are deposited in the joints and cause swelling), and psoriasis (a chronic skin disease).
	www.mercydesmoines.org /adam/alternativemedicine/ConsSupplements/Quercetincs.asp (821 words)

	Prostatitis and Quercetin
		Quercetin is a plant-derived bioflavonoid with a wide range of effects.
		He says that quercetin has also been shown to inhibit the induction and function of T cells in vitro, so it may be able to short-circuit the root cause of autoimmunity (presuming autoimmunity is involved in CP/CPPS).
		Its general properties are: anti-oxidant, tyrosine kinase inhibitor, nitric oxide inhibitor, anti-inflammatory (inhibits NF-kB, blocks PGE-2 and cox-2 gene expression) and inhibitor of histamine and cytokine release from mast cells (quercetin inhibits the release of histamine, leukotrienes (LTs), prostaglandin D2 (PGD2), and granulocyte macrophage-colony stimulating factor (GM-CSF) from human cultured mast cells).
	www.chronicprostatitis.com /quercetin.html (438 words)

	Quercetin - Supplements
		Quercetin is a water-soluble flavonoid typically found in red wine, green tea, onions, apples and leafy vegetables.
		Quercetin has been shown to be effective as a general-purpose antioxidant, vasodilator and blood thinner.
		Although the thermogenic properties of quercetin have yet to be fully evaluated in human trials, there is evidence from test tube studies to suggest that flavonoids such as quercetin and green tea catechins are effective in elevating norepinephrine levels and stimulating fat oxidation.
	www.supplementwatch.com /supatoz/supplement.asp?supplementId=238 (1279 words)

	Activated Quercetin
		Quercetin is no stranger to the human diet: for example, onions may contain up to 6% quercetin (dry weight).
		Quercetin's main disadvantage is that it is barely soluble in water, and therefore difficult for the body to absorb.
		Source Naturals combines its quercetin with bromelain, an enzyme derived from pineapple that is known to increase the body's ability to absorb various substances.
	www.healthytreasures.com /sourcenatural/quercetin.htm (469 words)

	Quercetin
		A special type of quercetin, quercetin chalcone, is claimed to have better absorption, but there is little reliable evidence to prove this.
		Quercetin is widely marketed as a treatment for allergic conditions such as asthma, hay fever, eczema, and hives.
		Quercetin "fails" a standard laboratory test called the Ames test, which is designed to identify chemicals that might be carcinogenic.
	healthlibrary.epnet.com /GetContent.aspx?token=e0498803-7f62-4563-8d47-5fe33da65dd4&chunkiid=21847 (1391 words)

	Quercetin (Site not responding. Last check: 2007-11-05)
		In lab tests, quercetin, a polyphenol found in onions, was shown to inhibit pancreatic cancer growth in cell and animal studies.
		Quercetin decreased primary tumor growth, increased apoptosis and prevented metastasis in a model of pancreatic cancer.
		Nuclear factor-kappa B activity was inhibited by quercetin and trans-resveratrol, but not genistein, indicating that this transcription factor is not the only mediator of the polyphenols' effects on apoptosis.
	www.youngagain.com /quercetin1.html (642 words)

	Quercetin, a potent antioxidant found in apples, protects against Alzheimer's disease
		In a recent study, isolated rat brain cells were exposed to concentrations of either quercetin or vitamin C. The cells were then exposed to hydrogen peroxide to simulate Alzheimer’s damage.
		Because quercetin is concentrated in the skin of apples, eating them fresh provides a better source.
		Scientists are not sure of quercetin's mechanism of action, but some suspect it might work by blocking the action of highly-active chemicals called free radicals, an excess of which are thought to damage brain cells as well as other cell types over time.
	www.newstarget.com /002509.html (529 words)

	bromelain/quercetin (Site not responding. Last check: 2007-11-05)
		When dealing with inflammatory conditions (such as eczema or allergies), there are several good reasons to consider products that combine bromelain, a natural anti-inflammatory derived from pineapples, and quercetin, a plant pigment (or flavonoid) prominent in apples and onions.
		Quercetin, a natural antihistamine, may be particularly helpful in relieving hay fever and other allergic reactions.
		While bromelain and quercetin are generally considered safe, even at high doses, avoid taking this combination if you have an active gastric or duodenal ulcer.
	www.wholehealthmd.com /refshelf/substances_view/1,1525,941,00.html (405 words)

	Quercetin
		This formulation incorporates the highest potency quercetin available, derived from a non-citrus hypoallergenic plant source, and stabilized with additional antioxidants so as not to auto-oxidize (degrade spontaneously).
		The body may use quercetin to strengthen the mast cells, involved in the release of histamine, potentially inhibiting that activity.
		In addition, Quercetin has been shown to reduce the production of prostaglandins and leukotrines which are thought to play a much larger role in promoting inflammation than histamine.
	www.springboard4health.com /store/more_arg_quercetin.html (155 words)

	Prostatitis Website -- Quercetin Page
		What I have learned from using quercetin in many patients with different symptoms and forms of chronic prostatitis/chronic pelvic pain syndrome is that the use of pure quercetin, while effective in many patients, is a start, but can be improved upon.
		We are currently working with a supplement manufacturer to produce a capsule for us which combines a known potent dose of quercetin with agents that can improve quercetin absorption as well as agents that can work synergistically with quercetin to reduce oxidant stress in the prostate.
		Consequently, for patients that Quercetin has not helped, we have not known whether a suitable amount of Quercetin was actually in the tablets the patient bought.
	www.prostatitis.org /quercetin.html (2174 words)

	Quercetin - North American Pharmacal: The Blood Type Store (Site not responding. Last check: 2007-11-05)
		Quercetin belongs to a class of water-soluble plant pigments called flavonoids.
		Quercetin belongs to a group of plant pigments called flavonoids that are Quercetin also works as an antioxidant by scavenging damaging particles in the
		Quercetin is widely distributed in the plant kingdom and has been shown in experimental studies to have
	allindexes.com /alid/quercetin.htm (346 words)

	Onions protect against many health ailments
		Onions contain a great deal of the flavonoid quercetin, which has been associated with reduced risk for many chronic diseases and health problems including cataracts, cardiovascular disease, breast, colon, ovarian, gastric, lung and bladder cancers, and onions also contain naturally-occurring chemicals that are linked to reducing cholesterol levels and blood pressure.
		Other sources are tea and apples, but research shows that absorption of quercetin fromonions is twice that from tea and more than three times that from apples.
		Studies have indicated that quercetin helps to eliminate free radicals in the body, to inhibit low-density lipoprotein oxidation (an important reaction in the atherosclerosis and coronary heart disease), to protect and regenerate vitamin E (a powerful antioxidant) and to inactivate the harmful effects of chelate metal ions.
	www.newstarget.com /009960.html (497 words)

	Bodybuilding.com - Quercetin Information and Product Listing! Quercetin FAQ! (Site not responding. Last check: 2007-11-05)
		Quercetin is a plant pigment called a flavonoid.
		Quercetin can be found in many fruits and vegetables.
		Other fruits and vegetables that are high in flavonoids including quercetin are grapes, dark cherries, and dark berries, such as blueberries, flberries, and bilberries.
	www.bodybuilding.com /cgi-bin/sb/ref.cgi?storeid=*1edb501414099214761045d71f9e74a233&name=aff247&url=http://www.bodybuilding.com/store/quer.html (283 words)

	Quercetin - Bioflavonoid - Encapsulated Herbal Nutrient - Herbs (Site not responding. Last check: 2007-11-05)
		Quercetin is a Citrus Bioflavonoid - a natural substance found in plants, fruits, vegetables, nuts, bark, and buckwheat.
		Citrus Bioflavonoids are sometimes considered vitamins because they possess the properties of a vitamin, and are sometimes referred to as vitamin P. They are found in several forms, including hesperidin, eriodictyl, quercetin, rutin, and hesperitin.
		The bioflavonoid Quercetin is typically available in capsule form as a supplement by itself.
	www.viable-herbal.com /singles/herbs/s914.htm (895 words)

	QUERCETIN, 90 caps 250mg + Vit C 100mg (Site not responding. Last check: 2007-11-05)
		Quercetin may inhibit histamine release from basophils (a type of white blood cell) and mast cells (large cells in connective tissue).
		Flavonoids, including quercetin, also promote insulin secretion, increase vitamin C levels, protect blood vessels, prevent easy bruising, and support the immune system—all of which are beneficial to individuals with diabetes.
		Quercetin may control the spread of certain viruses within the body.
	www.youngagain.info /cgi-bin/product.cgi?id=2163 (832 words)

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