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Quotes about Quercetin from the world's top natural health / natural living authors

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"In this group of phenolics, a large family of chemicals that includes the flavonoids, is a natural antioxidant called quercetin that protects apples against disease. Research at Cornell University shows that consuming quercetin (which is mostly contained in apple skin and just below the peel) may lower the risk of Alzheimer's and Parkinson's disease by defending nerve cells against free radical damage. In addition, previous studies have shown that quercetin helps the body fight off cancer. Is this proof that an apple a day keeps the doctor away?" - Brenda Watson and Leonard Smith, The Detox Strategy: Vibrant Health in 5 Easy Steps (Get the book.)

"Quercetin has "the potential to revert a cancerous cell back to a normal healthy cell, called prodifferentation."44 quercetin also induces apoptosis or programmed cell death in otherwise "immortal" cancer cells.24 It inhibits inflammation by reducing histamine release24 and reduces tumour-cell proliferation.24 Quillin also refers to new studies which show that quercetin "may be one of the most potent anti-carcinogens in nature." - Michael Gearin-Tosh, Living Proof: A Medical Mutiny (Get the book.)

"You may want to refer to the earlier chapter on Hypothyroidism. 8. quercetin is another possibility. As noted in an undated pamphlet by Dr. Susan Lark, M.D., titled "The Miracle of Simple", "Knock out an allergy attack with 600 mg of 'Quercetin', which is derived from onions. Taken with vitamin C, it stops histamine release in its tracks." Incidentally, quercetin is a bioflavonoid, and included in some vitamin C formulas. As I noted earlier, I would recommend Ester C with bioflavonoids. 9. MSM has a great antihistamine effect, according to Dr. Ronald Lawrence, M.D., Ph.D." - Dr David W Tanton, Ph.D., Antidepressants, Antipsychotics, And Stimulants - Dangerous Drugs on Trial (Get the book.)

"Onions provide the richest source of quercetin, a potent and versatile anticancer, disease-hindering flavonoid. Yellow and red onions are a good source of quercetin, though white onions are not. More than 135 slightly different quercetin compounds exist, such as rutin, which is used to treat fragile capillaries (tiny blood vessels). quercetin is the most abundant flavonol in red wine, where rutin is also present. As a rule the deeply red Cabernet Sauvignon has the highest quercetin content. Other dietary sources include broccoli, red grapes, shallots, and yellow squash." - J. Robert Hatherill, Eat To Beat Cancer: A Research Scientist Explains How You and Your Family Can Avoid Up to 90% of All Cancers (Get the book.)

"Over 4,000 different flavonoids have been identified in foods and plants. quercetin, rutin, catechin, and hesperidin are the most frequently used in medicine. Flavonoids inhibit the peroxidation of lipids by acting as free radical scavengers.284 quercetin specifically has been shown to inhibit LDL oxidation.285 In addition to these direct antioxidant effects, flavonoids inhibit platelet aggregation, protect vitamin E from oxidation, and chelate iron. In numerous dietary studies, flavonoids have been shown to reduce cardiovascular disease." - Tori Hudson, N.D., Women's Encyclopedia of Natural Medicine: Alternative Therapies and Integrative Medicine for Total Health and Wellness (Get the book.)

"Quercetin: This is found to be the most active of the flavonoids in studies, and many medicinal plants owe much of their activity to their high quercetin content. It has demonstrated significant antiinflammatory activity because of direct inhibition of several initial processes of inflammation. Also quercetin shows remarkable anti-tumour properties. Resveratrol: A class of polyphenol compounds produced as a part of a plant's defense system against disease." - Jan Lovejoy, Get Balanced-the Natural Way to Better Health with Superfoods (Get the book.)

"A prime role of quercetin is to protect the integrity of cell walls from free radical damage. In addition, quercetin prevents the release of histamines into the bloodstream, thereby helping to control food and pollen allergies. Gingko biloba?80 mg (24/6%) Known as the brain antioxidant, gingko has been shown to increase brain functionality, which makes it useful in helping to improve concentration and memory. This makes it a specific for Alzheimer's, where it has the added benefit of helping to significantly reduce depression." - Jon Barron, Lessons from The Miracle Doctors: A Step-by-Step Guide to Optimum Health and Relief from Catastrophic Illness (Get the book.)

"Among the reasons for this may be the fact that quercetin "competes with oestrogen for binding sites, thus defusing the damaging effects of oestrogen" in breast cancer. quercetin is also "a potent antioxidant." It "inhibits capillary fragility which protects connective tissue against breakdown by tumours," in angiogenesis and metastasis. quercetin also interferes with metastasis by reducing cell aggregation or "stickiness." It "helps to eliminate toxic metals through chelation."38 This is just one component in Gerson's fruit list." - Michael Gearin-Tosh, Living Proof: A Medical Mutiny (Get the book.)

"Flavonoids include quercetin, which promotes insulin secretion and is a potent inhibitor of sorbitol accumulation. quercetin has been found in vitro to inhibit sorbitol accumulation in human lenses,121 and has been found to slow the course of cataract formation.122'123 Other flavonoids include naringin and hespertin; both have been found to be aldose reductase inhibitors, therefore protecting against the accumulation of sorbitol." - Gabriel Cousens, There Is a Cure for Diabetes: The Tree of Life 21-Day+ Program (Get the book.) "Found in apples, onions, and garlic, quercetin helps improve gene expression related to allergy and arthritis, and helps maintain the integrity of vascular tissue for improved circulation. Bioflavonoids, of which quercetin is one, are among the most important modifiers of gene expression, in addition to being antioxidants. Once we understand this first principle about eating a Culture of Life anti-diabetogenic diet, we start to understand that what we take into our body has very important healing effects. In a October 1997 article in Science by Dr." - Gabriel Cousens, There Is a Cure for Diabetes: The Tree of Life 21-Day+ Program (Get the book.)

"In addition, a supplement known as quercetin can help block the release of histamines into the blood, which means less inflammation, experts say. Both substances are available in health food stores. Suggested dosage: 30 mg of Co-Q-10 daily; 100-500 mg of quercetin daily. Check with your doctor to see if these supplements are appropriate for your condition. arthritis Reflexology to the Rescue No, reflexology does not have solid scientific evidence to back up its use for treating painful conditions." - Bottom Line Books, Uncommon Cures For Everyday Ailments (Get the book.) "But for people who don't appreciate the side effects (like drowsiness) of antihistamines, quercetin can provide quick relief. Made from derivatives of flowers and fruit plants, quercetin keeps the body from releasing histamines, thereby suppressing hay fever and cold symptoms. Found in most health food stores, typical dosage is 200 mg, taken just before eating. Time to Avoid Sniffles 2 Apply very firm pressure for one minute, pushing toward the bones of the hand. 3 Repeat, switching hands." - Bottom Line Books, Uncommon Cures For Everyday Ailments (Get the book.)

"Among the reasons for this may be the fact that quercetin "competes with oestrogen for binding sites, thus defusing the damaging effects of oestrogen" in breast cancer. quercetin is also "a potent antioxidant." It "inhibits capillary fragility which protects connective tissue against breakdown by tumours," in angiogenesis and metastasis. quercetin also interferes with metastasis by reducing cell aggregation or "stickiness." It "helps to eliminate toxic metals through chelation."38 This is just one component in Gerson's fruit list." - Michael Gearin-Tosh, Living Proof: A Medical Mutiny (Get the book.)

"Research at Cornell University shows that consuming quercetin (which is mostly contained in apple skin and just below the peel) may lower the risk of Alzheimer's and Parkinson's disease by defending nerve cells against free radical damage. In addition, previous studies have shown that quercetin helps the body fight off cancer. Is this proof that an apple a day keeps the doctor away? I think we're just beginning to understand the power of these phytochemicals and there will be nothing but good news ahead." - Brenda Watson and Leonard Smith, The Detox Strategy: Vibrant Health in 5 Easy Steps (Get the book.)

"These include vitamin A (as palmitate), bioflavonoids (from citrus), L-arginine, quercetin, N-acetyl glucosamine, corn silk, kava root, and Oregon grape root. Although the cause of IC is unknown, it is important to consider the possible causes to 167 KEY CONCEPTS • IC is a noninfectious chronic condition characterized by pelvic and/or perineal pain, urinary urgency, urinary frequency, bladder pain, and urination at night. • IC is difficult to diagnose with any test; tests are mostly done to rule out other causes of the symptoms." - Tori Hudson, N.D., Women's Encyclopedia of Natural Medicine: Alternative Therapies and Integrative Medicine for Total Health and Wellness (Get the book.)

"Potent inhibitory effect of naturally occurring flavonoids quercetin and kaempferol on in vitro osteoclastic bone resorption. Biochem Pharmacol. 2003 Jan l;65(l):35-42. 60. Prouillet C, Maziere JC, Maziere C, Wattel A, Brazier M, Kamel S. Stimulatory effect of naturally occurring flavonols quercetin and kaempferol on alkaline phosphatase activity in MG-63 human osteoblasts through ERK and estrogen receptor pathway. Biochem Pharmacol. 2004 Apr 1;67(7): 1307-13. A unique form of vitamin E, tocotrienols, supports healthy bone metabolism. Regular vitamin E, d alpha tocopherol, does not help. 61." - Byron J. Richards, Fight for Your Health: Exposing the FDA's Betrayal of America (Get the book.) "In vivo quercitrin anti-inflammatory effect involves release of quercetin, which inhibits inflammation through down-regulation of the NF-kappaB pathway. Eur J Immunol. 2005 Feb;35(2):584-92. 59. Wattel A, Kamel S, Mentaverri R, Lorget F, Prouillet C, Petit JP, Fardelonne P, Brazier M. Potent inhibitory effect of naturally occurring flavonoids quercetin and kaempferol on in vitro osteoclastic bone resorption. Biochem Pharmacol. 2003 Jan l;65(l):35-42. 60. Prouillet C, Maziere JC, Maziere C, Wattel A, Brazier M, Kamel S." - Byron J. Richards, Fight for Your Health: Exposing the FDA's Betrayal of America (Get the book.)

"Flavonoids inhibit the peroxidation of lipids by acting as free radical scavengers.284 quercetin specifically has been shown to inhibit LDL oxidation.285 In addition to these direct antioxidant effects, flavonoids inhibit platelet aggregation, protect vitamin E from oxidation, and chelate iron. In numerous dietary studies, flavonoids have been shown to reduce cardiovascular disease.286,287 Green, oolong, and black tea are made from the leaves of the Camellia sinensis plant and are rich in cardioprotective flavonoids. Green tea is especially rich in the flavonoids called catechins." - Tori Hudson, N.D., Women's Encyclopedia of Natural Medicine: Alternative Therapies and Integrative Medicine for Total Health and Wellness (Get the book.)

"Red and yellow onions possess higher levels of quercetin than white do. The sulfur compounds in raw onions (the ones that, no matter what you do, make you cry) appear to have a blood-thinning effect, according to animal studies from the University of Wisconsin-Madison. Other studies link these compounds with lowering blood pressure and cholesterol, although more research needs to be done. Onions may help the gut. In addition to all the beneficial components already discussed, onions contain fructooligosaccharides (FOS)." - Elaine Magee, Food Synergy: Unleash Hundreds of Powerful Healing Food Combinations to Fight Disease and Live Well (Get the book.)

"They include bioflavonoids hesperidin, rutin, and quercetin as well as other sources of antioxidants like grape seed, bilberry, and resveratrol and fruit concentrates rich in vitamin C. CONTRAINDICATIONS Side effects from vitamin C are uncommon and usually minimal and may include gastrointestinal discomfort, such as diarrhea when large doses are consumed. Seek the advice of your doctor when undertaking large therapeutic doses of vitamin C, especially in conjunction with chemotherapy and radiation." - Freedom Press, Natural Cancer Cures: The Definitive Guide to Using Dietary Supplements to Fight and Prevent Cancer (Get the book.)

"She points out that cranberry juice is a rich source of phytonutrients such as anthocyanins, catechins, lutein (the new superstar of eye nutrition), and quercetin (one of the most powerful natural anti-inflammatories in the plant kingdom). These phytonutrients act as antioxidants and, according to Gittleman, provide nutritional support for the detoxification pathways in the body. The rich phytonutrient content of both cranberries and cranberry juice has been borne out by research and may have an awful lot of benefits that go beyond relief from urinary tract infection." - Jonny Bowden, Ph.D., C.N.S., The Most Effective Natural Cures on Earth: The Surprising, Unbiased Truth about What Treatments Work and Why (Get the book.)

"Kaempferol is present in the columella and root cap, but quercetin only accumulates after an auxin pulse or NPA treatment (Peer et al., 2004). As kaempferol inhibits mammalian monoamine oxidases that are similar to characterized IAA oxidases (Sloley et al., 2000) and flavonoid-deficient Arabidopsis mutants exhibit increased leakage of radiolabeled IAA or oxidized IAA from the root tip (Murphy et al, 2000; Peer et al., 2004), kaempferol may function in limiting the oxidation of auxin destined for basipetal redirection at the root tip." - Erich Grotewold, The Science of Flavonoids (Get the book.) "Regiospecific methylation of 6-hydroxy quercetin catalyzed by a phenylpropanoid and flavonoid O-methyltransferase from the ice plant, Mesembryanthemum crystallinum (Vogt, 2004). 4.2. Flavonoid Glycosyltransferases The addition of sugar groups has been well documented to enhance the solubility of flavonoids, as well as many other metabolites, and is likely to be critical for the transport and storage of these compounds at the final destinations in the vacuole or cell wall." - Erich Grotewold, The Science of Flavonoids (Get the book.) "Quercetin, myricetin, and catechin-gallate were found to directly inhibit glucose uptake mediated by GLUT4; in addition, flavonoid uptake also appears to be mediated by GLUT transporters in mammalian cells (Strobel et al, 2005). GLUT4 cycling is regulated by APM/IRAP, and these data suggest that APM/IRAP is the likely mechanism regulating glucose uptake. AtAPMl from plants has a trafficking domain and binds flavonols, suggesting that flavonol-AtAPMl interactions also may modulate membrane trafficking in plants (Murphy et al., 2002, 2005; Muday and Murphy, 2002; Muday et al, 2003)." - Erich Grotewold, The Science of Flavonoids (Get the book.) "In contrast to quercetin, tannins have been shown to increase membrane fluidity (Labieniec and Gabryelak, 2003). Flavonoids also may modify the plasma membrane by altering the lipid composition. During nodulation, flavonoids induce expression of nod genes but also appear to alter the membrane composition of Rizobium leguminosarum. After nodulation induction, accumulation of the phospholipid diglycosyl diacylglycerol occurred in wild type but not in mutant bacteria lacking the nod genes (Orgambide et al, 1994)." - Erich Grotewold, The Science of Flavonoids (Get the book.)

"The Miracle of Simple", "Knock out an allergy attack with 600 mg of 'Quercetin', which is derived from onions. Taken with vitamin C, it stops histamine release in its tracks." Incidentally, quercetin is a bioflavonoid, and included in some vitamin C formulas. As I noted earlier, I would recommend Ester C with bioflavonoids. 9. MSM has a great antihistamine effect, according to Dr. Ronald Lawrence, M.D., Ph.D., one of the speakers at the Symposium for Health Freedom conference in Anaheim, California, (November 16, 2002), which I attended. 10." - Dr David W Tanton, Ph.D., Antidepressants, Antipsychotics, And Stimulants - Dangerous Drugs on Trial (Get the book.)

"Yellow and red onions are a good source of quercetin, though white onions are not. More than 135 slightly different quercetin compounds exist, such as rutin, which is used to treat fragile capillaries (tiny blood vessels). quercetin is the most abundant flavonol in red wine, where rutin is also present. As a rule the deeply red Cabernet Sauvignon has the highest quercetin content. Other dietary sources include broccoli, red grapes, shallots, and yellow squash. Anticancer Benefits of the Onion Group A number of qualities recommend the foods in this group." - J. Robert Hatherill, Eat To Beat Cancer: A Research Scientist Explains How You and Your Family Can Avoid Up to 90% of All Cancers (Get the book.)

"Onions, for instance, are the best dietary source of quercetin, a flavonoid compound that helps block the oxidation of LDL. A Dutch study with men aged sixty-five to eighty-four found a reduced risk of heart attack and sudden death among those individuals who ate more onions. If you like red wine, as many Mediterraneans do, you will be pleased to know about red wine polyphenols, compounds that change the properties of blood lipids to make LDL more resistant to oxidation. Moderate wine drinkers have a significantly lower mortality rate from coronary heart disease." - Stephen Sinatra, M.D. and James C., M.D. Roberts, Reverse Heart Disease Now: Stop Deadly Cardiovascular Plaque Before It's Too Late (Get the book.)

"In addition, previous studies have shown that quercetin helps the body fight off cancer. Is this proof that an apple a day keeps the doctor away? I think we're just beginning to understand the power of these phytochemicals and there will be nothing but good news ahead. Where you find a healthy dose of phytonutrients, you often find a cornucopia of vitamins and minerals. Calcium and Magnesium for Women Women have an extra need for these minerals, so you would do well to add a calcium/magnesium supplement containing the proper ratio of these important macronutrients." - Brenda Watson and Leonard Smith, The Detox Strategy: Vibrant Health in 5 Easy Steps (Get the book.)

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