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MoonDragon's Health & Wellness
Nutrition Basics

Supplements
QUERCETIN

& Quercetin-C, Activated Quercetin


"For Informational Use Only"
For more detailed information contact your health care provider
about options that may be available for your specific situation.





  • Quercetin Description
  • Quercetin Uses, Health Benefits & Scientific Evidence
  • Quercetin Dosage Information
  • Quercetin Safety, Cautions & Interactions
  • Quercetin Supplements & Products




  • QUERCETIN DESCRIPTION

    A BIOFLAVONOID

    Quercetin is also known as Quercetine, Sophretin, Meletin and 3,3',4',5,7-Pentahydroxyflavone, Citrus Bioflavonoid Extract, Citrus Flavones. The name, Quercetin, has been used since 1857, and is derived from quercetum (oak forest), after Quercus.

    Quercetin is a type of plant-based chemical or phytochemical, a plant pigment known as a flavonoid and is widely distributed in nature. It is a polar auxin transport, the regulated transport of the plant hormone auxin in plants. Auxin is a plant growth substance with some morphogen-like characteristics, having a role in the coordination of many growth and behavioral processes in the plant's life cycle and plant body development. Like many other bioflavonoids, Quercetin has antioxidant, anti-atherogenic, and anti-carcinogenic properties. Quercetin is also neuroactive, with some of the same abilities as Caffeine but less potent.

    Quercetin is a bioflavonoid similar to Rutin that is commonly found in red apples and red onions, as well as many fruits, vegetables, leaves and grains. It can be used as an ingredient in supplements, beverages, or foods. When combined with Vitamin C, it is called Activated Quercetin. Plants containing flavonoids have a long history of use in traditional medicines in many cultures, but flavonoids themselves were not discovered until the 1930s. Quercetin first gained attention several decades ago when it was found to cause DNA mutations in bacteria, a sign that it might actually contribute to causing cancer. Animal research done since that time has been inconclusive, and what little evidence there is in humans does not seem to support this idea. Research in recent years has focused on several possible helpful effects of quercetin, including its potential role in preventing cancer.

    Quercetin appears to have anti-inflammatory and antioxidant properties. It has been promoted as being effective against a wide variety of diseases, including cancer. While some early lab results appear promising, as of yet, there is reliable clinical evidence that Quercetin can prevent or treat cancer in humans.

    Good dietary sources of Quercetin include apples, onions, teas, red wines, and many other foods. Quercetin is a common chemical pigment in the rinds and barks of a wide variety of plants. It is one of the main flavonoids in the diet, and is found in large amounts in apple skins, onions, Green Tea and red wine. It is also found in leafy green vegetables, berries, and in herbs such as Ginkgo and St. John's Wort, American Elder, and others. Buckwheat tea has a large amount of Quercetin.

    Quercetin is also available as a dietary supplement. People use Quercetin as a medicine for treating conditions of the heart and blood vessels, including "hardening of the arteries" (atherosclerosis), high cholesterol, high blood pressure, heart disease, and circulation problems. It is also used for diabetes, cataracts, hay fever, peptic ulcer, chronic fatigue syndrome (CFS), preventing cancer, for treating chronic infections of the prostate, improving the function of kidney transplants, and increasing exercise endurance.





    QUERCETIN USES, HEALTH BENEFITS, & SCIENTIFIC EVIDENCE

    ANTI-INFLAMMATORY BENEFITS

  • Allergies: Quercetin has powerful anti-inflammatory effects, acts as an antihistamine, and helps reduce viral activity. Human cell culture studies with quercetin have demonstrated its capability to inhibit the release of histamine from mast cells. Quercetin is widely marketed as a treatment for allergic conditions such as asthma, hay fever, eczema, and hives. These proposed uses are based on test-tube research showing that quercetin prevents certain immune cells from releasing histamine, the chemical that triggers an allergic reaction. Quercetin may also block other substances involved with allergies. However, this evidence is extremely preliminary, far too preliminary to rely upon at all. There is as yet no direct evidence that taking quercetin supplements will reduce your allergy symptoms.

  • Prostatitis: A different proposed use of quercetin does have some meaningful supporting evidence. Prostatitis is an inflammation or infection of the prostate gland. The condition causes chronic pain and difficulty with urination and is sometimes called chronic pelvic pain syndrome. Conventional treatment for this condition is often unsatisfactory. One small double-blind, placebo-controlled study has found preliminary evidence that quercetin might help. A one-month, double-blind, placebo-controlled trial of 30 men with chronic pelvic pain (prostatitis) tested the potential effectiveness of quercetin. Participants received either placebo or 500 mg of the supplement twice daily. The results showed that people who received quercetin experienced a statistically significant improvement in symptoms (such as pain), but those given placebo did not improve.

  • Interstitial Cystitis: Another small, double-blind, placebo-controlled trial found that a supplement containing quercetin reduced symptoms of interstitial cystitis. People with interstitial cystitis experience pain and discomfort in the bladder that is reminiscent of a bladder infection, but without the actual presence of such an infection. In a 6-week double-blind, placebo-controlled study, 20 people received either placebo or a supplement containing quercetin and other bioflavonoids. The results appeared to indicate better results in the quercetin group.

  • Heart Disease: As an antioxidant, it may help to prevent heart disease by protecting LDL cholesterol from becoming damaged, which cardiologists believe is the underlying cause of heart disease. It has been suggested that quercetin’s antioxidant properties might make it helpful for preventing heart disease and strokes. However, the evidence that it works is highly incomplete. Keep in mind that other powerful antioxidants such as vitamin E and beta-carotene have been ineffective for preventing these conditions. There is limited evidence, however, from a single, small double-blind trial that quercetin might have the separate effect of lowering blood pressure when it is high. In persons with stage I hypertension given 730 mg Quercetin (aglycone in two divided doses) over a month, supplementation was associated with reductions in both systolic (-7+/-2mmHg) and diastolic (-5+/-2mmHg) independent of improvements in oxidative status; this benefit was not seen in nonhypertensive persons. The changes in blood pressure did not persist following supplement cessation.

  • Diabetic Nerve Damage: Quercetin may also block an enzyme that leads to accumulation of sorbitol, which has been linked to nerve, eye and kidney damage in people with diabetes. An animal study found that quercetin might protect rodents with diabetes from forming cataracts.

  • Viral Infection Prevention: Another intriguing finding from test-tube research is that quercetin seems to prevent a wide range of viruses from infecting cells and reproducing once they are inside cells. Quercetin is a potent natural reverse transcriptase blocker. Though large doses may be required in humans to produce therapeutic effects, quercetin has been shown to have antiviral activity against HIV, herpes simplex, polio virus, various respiratory viruses such as the respiratory syncytial virus (RSV), including influenza. One study even showed that it was possible to overcome the polio virus by pairing vitamin C with quercetin.


  • Vitamin C is an antioxidant vitamin, which helps prevent oxidation of water-soluble molecules that could otherwise create free radicals. It also acts as a stimulator to the immune system; through this function, along with its antioxidant properties, it may help in the prevention and treatment of infections and other diseases. It may be helpful against bacterial, viral and fungal diseases. Bioflavonoids combined with Vitamin C work to rebuild small blood vessels and other structural parts of the body.

  • Cancer: Test tube studies and animal research additionally suggest that quercetin might have cancer preventive properties.

  • Exercise Performance: In mice, mitochondrial biogenesis associated with exercise is increased with oral supplementation of 12.5 to 25 mg/kg Quercetin. Studies that use quercetin in isolation for power output tend to note failures with supplementation. Inclusion of Quercetin with other antioxidants tends to show performance improvement.

  • QUERCETIN & CANCER RESEARCH

    Most of the research on quercetin and cancer has been done in cell culture or animal studies. These types of studies can suggest possible helpful effects, but they do not provide proof that such effects can be achieved in humans. It is still unclear how well quercetin is absorbed by the human body when taken by mouth. Controlled clinical trials are needed to show whether quercetin has helpful properties in humans.

    Studies done in cell cultures have shown that quercetin has activity against some types of cancer cells. This may be due to its antioxidant or anti-inflammatory properties, or it may be due to other mechanisms. Recent studies suggest that quercetin can slow the growth of cancer cells and can help foster apoptosis, a form of natural cell death that does not happen in most cancer cells. Some studies in animals have shown that quercetin may help protect against certain types of cancer, particularly colon cancer.

    Studies in humans have mainly been population-based and have focused on the role of flavonoids in the diet as a group as opposed to quercetin in particular. These types of studies are not as conclusive as clinical trials. They cannot prove cause and effect but often suggest links that can then be tested in clinical trials. While some of these population-based studies have found that people with diets high in flavonoids may have lower risk of breast, lung, pancreatic, and other types of cancer, it is not clear what role quercetin played in their findings. One clinical study of people with a strong inherited tendency to develop colorectal cancer found that the combination of quercetin and curcumin supplements decreased the number and size of precancerous rectal tumors. No other clinical trials testing quercetin's ability to prevent or treat cancer have been reported in the medical literature. Clinical trials are needed to further clarify quercetin's possible benefits.

    In addition to cancer prevention and treatment, preliminary studies have also suggested potential value for quercetin in prostatitis (inflamed prostate) and heart disease. Further studies are needed before any recommendations can be made.

    ABOUT QUERCETIN STUDIES

    There is a divide between the effects seen in Quercetin in in vitro (cell cultured) studies and in vivo (in living) studies, with cell studies showing great results that are not that amazing in humans or animals. This is mostly due to Quercetin having low oral bioavailability (low percentage of the compound is absorbed and put to use), but could also be due to in vitro studies using a form of Quercetin called 'Quercetin Aglycone' whereas this particular form is never found in the blood, even after ingested, as it it gets changed in the liver.

    Many studies also note a high range of differences between people who ingest the same amount of quercetin, suggesting a large degree of variability is possible with supplementation.





    QUERCETIN DOSAGE INFORMATION

    QUERCETIN FOODS

    Until conclusive clinical research findings emerge, it is reasonable to include foods that contain quercetin as part of a balanced diet with an emphasis on fruits, vegetables, legumes, and whole grains. The interaction between certain phytochemicals and the other compounds in foods is not well understood, but it is unlikely that any single compound offers the best protection against cancer.

    A balanced diet that includes 5 or more servings a day of fruits and vegetables, along with foods from a variety of other plant sources such as nuts, seeds, whole grain cereals, and beans, is likely to be more effective in reducing cancer risk than eating one particular phytochemical in large amounts.


    FOODS CONTAINING QUERCETIN
    QUERCETIN ( mg / 100 g of Edible Portion)
    Capers, Raw
    234
    Capers, Canned
    173
    Lovage
    170
    Dock-Like Sorrel
    86
    Radish Leaves
    70
    Carob Fiber
    58
    Dill
    55 (48 to 110)
    Cilantro
    53
    Hungarian Wax Pepper
    51
    Fennel Leaves
    48.8
    Onion, Red
    32
    Radicchio
    31.5
    Watercress
    30
    Buckwheat
    23
    Kale
    23
    Chokeberry
    19
    Cranberry
    15
    Lingonberry
    13
    Plums, Black
    12
    Cow Peas
    11
    Sweet Potato
    10
    Blueberry, Cultivated
    8
    Sea Buckthorn Berry
    8
    Rowanberry
    7
    Crowberry
    5
    Prickly Pear Cactus Fruits
    5
    Apples, Red Delicious
    4
    Broccoli
    3
    Bilberry
    3
    Tea, Black or Green Camellia Sinensis
    2

    In red onions, higher concentrations of quercetin occur in the outermost rings and in the part closest to the root, the latter being the part of the plant with the highest concentration. One study found that organically grown tomatoes had 79-percent more quercetin than chemically grown fruit. Quercetin is present in various kinds of honey from different plant sources.


    QUERCETIN SUPPLEMENTS

    Although Quercetin is found in many foods, it is not considered an essential nutrient. To get a therapeutic dosage of Quercetin, you will have to take a supplement. Quercetin supplements are available in pill and tablet form. Quercetin as a dehydrated powder is yellow colored. When looking for Quercetin, the form of dihydrate has the apparent best bioavailability followed by glycosides, aglycone, and finally rutinoside.

    A typical therapeutic dosage is 200 to 400 mg, three times daily. Quercetin appears to be safe for most people when up to 500 mg twice daily are taken by mouth. It is not know if larger amounts might be safe. A special type of Quercetin, Quercetin Chalcone, is claimed to be absorber better, but there is little reliable evidence to prove this.

    Dosages of Quercetin used are in the range of 12.5 to 25 mg per kilogram (approximately 2.2 pounds) body weight, which translates to a range of 1,136 to 2,272 mg daily consumption of Quercetin when in isolation. It is suggested to supplement with other bioflavonoids such as Resveratrol, genistein, or Green Tea Catechins to increase the potency synergistically and theorectically get the benefits at a reduce level of intake.

    Quercetin works better (higher bioavailability) when taken with other bioflavonoids rather than using it as a stand-alone supplement (low bioavailability, depending on the source). Quercetin goes well with other bioflavonoids such as Genistein and Resveratrol, due to AMPK activation in the cell or by increasin bioavailability in the gut. It also goes well with Green Tea due to catechol-o-methyl transferase inhibition, and increasing bioavailability of Green Tea Catechins. Quercetin also goes well with Apigenin in regards to reducing Aromatase transcription.





    QUERCETIN SAFETY, CAUTIONS & INTERACTIONS

    SAFETY CONCERNS

    Quercetin in the amounts consumed in a healthy diet is unlikely to cause any major problems and appears to be quite safe.

    There have been some occasional reports of nausea when supplements are taken in high doses. Quercetin can cause headaches and tingling of the arms and legs. Very high doses might cause kidney damage.

    Concerns have been raised that, under some circumstances, it might raise cancer risk. Quercetin "fails" a standard laboratory test called the Ames test, which is designed to identify chemicals that might be carcinogenic. Nonetheless, a bad showing on the Ames test does not definitely mean a chemical causes cancer. Most other evidence suggests that quercetin does not cause cancer and may, in fact, help prevent cancer. Relying on this type of treatment alone and avoiding or delaying conventional medical care for cancer may have serious health consequences.

    Quercetin supplements have not been studied for safety in women who are pregnant or breast-feeding. One highly preliminary study suggests that quercetin combined with other bioflavonoids in the diet of pregnant women might increase the risk of infant leukemia. On this basis, pregnant women should probably avoid quercetin supplements. Maximum safe dosages for young children, nursing women, or people with serious liver or kidney disease have not been established.

    Evidence suggests that use of quercetin supplements can elevate urine and blood levels of the substance homovanillic acid. While this itself should be harmless, lab tests for homovanillic acid are used to diagnose a rare, dangerous condition called neuroblastoma, and for this reason, use of quercetin supplements could potentially cause a false positive diagnosis of this condition.

    DRUG INTERACTIONS

    Quercetin is contraindicated with some antibiotics. It may interact with fluoroquinolones (an antibiotic), as quercetin competitively binds to bacterial DNA gyrase. Whether this inhibits or enhances the effect of fluoroquinolones is not certain. Moderate caution should be taken with Quinolone antibiotics. Taking Quercetin along with some antibiotics migh decrease the effectiveness of some antibiotics. Some scientists think that Quercetin might prevent some antibiotics from killing bacteria. Quinolone antibiotics include ciprofloxacin (Cipro), levofloxacin (Levaquin), ofloxacin (Floxin), moxifloxacin (Avelox), gatifloxacin (Tequin), and others.

    Quercetin may have moderate interaction with Cyclosporine (Neoral, Sandimmune). Be cautious with this combination and discuss it with your health care provider. A small study in healthy volunteers shows that giving Quercetin before Cyclosporine increases blood levels of the Cyclosporine and lengthens the time it remains in the body. Medications changed by the liver (Cytochrome P450 2C8 (CYP2C8) substrates) have a moderate interaction rating. Be cautious with this combination and discuss it with your health care provider.

    AHFS Drug Information (2010) identifies Quercetin as an inhibitor of CYP2C8, and specifically names it as a drug with potential to have harmful interactions with taxol/paclitaxel. As paclitaxel is metabolized primarily by CYP2C8, its bioavailability may be increased unpredictably, potentially leading to harmful side-effects.

    Some medications are changed and broken down by the liver. Quercetin might decrease how quickly the liver breaks down some medications. Taking Quercetin along with some medications that are broken down by the liver can increase the effects and side effects of these medications. Some medications that are changed by the liver include paclitaxel (Taxol), rosiglitazone (Avandia), amiodarone (Cordarone), docetaxel (Taxotere), tretinoins, repaglinide (Prandin), verapamil (Calan, Isoptin, Verelan, etc.), and others.

    Medications changed by the liver (Cytochrome P450 2C9 (CYP2C9 substrates), like CYP2C8, have a moderate interaction rating. Again be cautious with this combination and discuss it with your health care practitioner. Some medications that are changed by the liver include celecoxib (Celebrex), diclofenac (Voltaren), fluvastatin (Lescol), glipizide (Glucotrol), ibuprofen (Advil, Motrin), irbesartan (Avapro), losartan (Cozaar), phenytoin (Dilantin), piroxicam (Feldene), tamoxifen (Nolvadex), tolbutamide (Tolinase), torsemide (Demadex), and warfarin (Coumadin). A small test tube study shows that quercetin might increase the effects that warfarin has on the body. Taking quercetin and warfarin together might increase the chance of side effects of warfarin such as bruising and bleeding.

    Medications changed by the liver (Cytochrome P450 2D6 (CYP2D6) substrates) have a moderate interaction rating. Be cautious with this combination and discuss it with your health care provider. Some medications are changed and broken down by the liver. Quercetin might decrease how quickly the liver breaks down some medications. Taking quercetin along with some medications that are broken down by the liver can increase the effects and side effects of these medications. Before taking quercetin, talk with your healthcare provider if you take any medications that are changed by the liver. Some drugs that are changed by the liver include amitriptyline (Elavil), codeine, flecainide (Tambocor), haloperidol (Haldol), imipramine (Tofranil), metoprolol (Lopressor, Toprol XL), ondansetron (Zofran), paroxetine (Paxil), risperidone (Risperdal), tramadol (Ultram), venlafaxine (Effexor), and others.

    Medications changed by the liver (Cytochrome P450 3A4 (CYP3A4) substrates). A moderate interaction rating is given for this combination. Discuss it with your health care provider. Some medications are changed and broken down by the liver. Quercetin might decrease how quickly the liver breaks down some medications. Taking quercetin along with some medications that are broken down by the liver can increase the effects and side effects of these medications. Before taking quercetin, talk with your healthcare provider if you take any medications that are changed by the liver. Some drugs that are changed by the liver include calcium channel blockers (diltiazem, nicardipine, verapamil), chemotherapeutic agents (etoposide, paclitaxel, vinblastine, vincristine, vindesine), antifungals (ketoconazole, itraconazole), glucocorticoids, alfentanil (Alfenta), fentanyl (Sublimaze), losartan (Cozaar), fluoxetine (Prozac), midazolam (Versed), omeprazole (Prilosec), lansoprazole (Prevacid), ondansetron (Zofran), propranolol (Inderal), fexofenadine (Allegra), amitriptyline (Elavil), amiodarone (Cordarone), citalopram (Celexa), sertraline (Zoloft), and numerous others.

    Medications moved by pumps in cells (P-Glycoprotein substrates) have a moderate interaction rating. Cautions is requred for this combination and discussion with your health care provider. Quercetin migh affect the way certain medications are processed by the body and might make these medications easier for the body to use and make them last longer in the body. Some of the drugs that may be affected in these ways by quercetin include paclitaxel, diltiazem, cyclosporine, saquinavir, digoxin, cancer drugs (etoposide, vinblastine, vincristine, vindesine), antifungals (ketoconazole, itraconazole), protease inhibitors (amprenavir, indinavir, nelfinavir), H2 antagonists (cimetidine, ranitidine), verapamil, corticosteroids, erythromycin, fexofenadine (Allegra), loperamide (Imodium), quinidine, and others.





    QUERCETIN SUPPLEMENTS & RELATED PRODUCTS

  • Quercetin, Quercetin-C & Activated Quercetin Supplement Products


  • QUALITY PRODUCTS & SUPPLEMENTS



    QUERCETIN (QUERCETIN-C / ACTIVATED QUERCETIN) SUPPLEMENT PRODUCTS

    Quercetin is a bioflavonoid similar to rutin that is commonly found in red apples and red onions. Combined with Vitamin C, bioflavonoids work to rebuild small blood vessels and other structural parts of the body. Quercetin has powerful anti-inflammatory effects, acts as an antihistamine, and helps reduce viral activity. Human cell culture studies with quercetin have demonstrated its capability to inhibit the release of histamine from mast cells. As an antioxidant, it may help to prevent heart disease by protecting LDL cholesterol from becoming damaged, which cardiologists believe is the underlying cause of heart disease. Quercetin may also block an enzyme that leads to accumulation of sorbitol, which has been linked to nerve, eye and kidney damage in people with diabetes. Quercetin is a potent natural reverse transcriptase blocker. Though large doses may be required in humans to produce therapeutic effects, quercetin has been shown to have antiviral activity against HIV, herpes simplex, polio virus and the respiratory syncytial virus (RSV). One study even showed that it was possible to overcome the polio virus by pairing vitamin C with quercetin. Vitamin C is an antioxidant vitamin, which helps prevent oxidation of water-soluble molecules that could otherwise create free radicals. It also acts as a stimulator to the immune system; through this function, along with its antioxidant properties, it may help in the prevention and treatment of infections and other diseases. It may be helpful against bacterial, viral and fungal diseases.

    HERBSPRO PRODUCTS

    HerbsPro: Quercetin Complex With Ester-C Plus, Solgar, 50 VCaps (36716)
    HerbsPro: Nettle Quercetin, Eclectic Institute Inc, 90 Caps (45767)
    Each 350 mg. capsule contains: Wildcrafted freeze-dried Stinging Nettle (Urtica dioica) leaf, 175 mg. Quercetin dihydrate, 175 mg.
    HerbsPro: Quercetin With Bioflavonoid Complex, Nutricology Allergy Research Group, 50/400 mg, 100 Caps (38755)
    Quercetin and other bioflavonoids extracted from lemon have made up the classical bioflavonoid nutritional supplements. By strengthening the outer cell membrane, these flavonoids may help stabilize cell surfaces, potentially inhibiting the release of histamine involved in allergic reactions, as well as neutralizing many chemicals involved in inflammatory processes. Each capsule contains 400 mg Lemon Bioflavonoid Complex, 50 mg Quercetin, 50 mg Rutin, 50 mg, and Hesperidin 50 mg.
    HerbsPro: Quercetin Complex With Ester-C Plus, Solgar, 100 VCaps (36715)
    Solgars Quercetin Complex includes the important bioflavonoid Quercetin in a synergistic formula with Ester-C Plus and Bromelain to provide unique antioxidant protection as well as natural seasonal support. Quercetin is found in onions and other foods. It possesses antioxidant properties which help to stabilize cell membranes. Ester-C Plus provides a patented, pH neutral (non acidic), form of vitamin C that is gentle on the stomach. Ester-C Plus offers the additional benefits of incorporating acerola berry, citrus bioflavonoids, rutin and rose hips. This formula also features bromelain, a natural enzyme derived from pineapple.
    HerbsPro: Optimized Quercetin, Life Extension, 250 mg, 60 VCaps (91950)
    Quercetin is a bioflavonoid that supports cellular health and function. In human cell culture studies, it has been shown to block the manufacture and release of inflammation-causing substances,which can help support a healthy immune response to the seasonally changing environment. It also helps promote a healthy cardiovascular system by preserving endothelial integrity and supporting healthy blood glucose levels for those already within normal range. Optimized Quercetin is a proprietary formulation that sets the gold standard for high-quality quercetin derived from a food-source blend (500 mg supplying 250 mg, Quercetin), Vitamin C from Camu Camu berry extract (30 mg), and Camu Camu extract from wildcrafted berry (150 mg).
    HerbsPro: Quercetin & Bromelain, Doctors Best, 250 mg / 125 mg, 180 Caps (69162)
    HerbsPro: Quercetin Bioflavonoid Complex, Natural Factors, 250 mg / 250 mg, 60 Caps (83870)
    HerbsPro: Quercetin Bioflavonoid Complex, Natural Factors, 250 mg / 250 mg, 90 Caps (83871)
    HerbsPro: Activated Quercetin, Source Naturals, 300 mg, 50 Tabs (7213)
    HerbsPro: Activated Quercetin, Source Naturals, 300 mg, 50 Caps (38226)
    HerbsPro: Quercetin-300, Nutricology Allergy Research Group, 300 mg, 60 Caps (38754)
    HerbsPro: Activated Quercetin, Source Naturals, 300 mg, 100 Caps (38227)
    HerbsPro: Activated Quercetin, Source Naturals, 300 mg, 100 Tabs (7214)
    HerbsPro: Activated Quercetin, Source Naturals, 300 mg, 200 Caps (38228)
    HerbsPro: Activated Quercetin, Source Naturals, 300 mg, 200 Tabs (7215)
    Activated Quercetin is a unique bioflavonoid derived from plant sources. In human cell culture studies, Quercetin has been shown to inhibit histamine release. Additional research needs to be conducted to confirm the effects of Quercetin, if any, in humans. Bromelain is a pineapple enzyme that may assist the body in times of stress. Magnesium ascorbate is a buffered (nonacidic) form of vitamin C that helps support the immune system.
    HerbsPro: Quercetin, Natures Life, 400 mg, 100 VCaps
    HerbsPro: Quercetin With Bromelain, Now Foods, 400 mg / 100 mg, 120 VCaps (68653)
    Quercetin is a naturally occurring bioflavonoid that supports healthy histamine levels, thereby helping to sustain a balanced immune response. Bromelain, an enzyme derived from pineapple stems, also supports healthy immune system function. The combination of Quercetin and Bromelain therefore provides powerful immunomodulating benefits important for the management of occasional seasonal discomfort.
    HerbsPro: Quercetin With Bromelain, Now Foods, 400 mg / 100 mg, 240 VCaps (82067)
    Quercetin is a naturally occurring bioflavonoid that supports healthy histamine levels, thereby helping to sustain a balanced immune response. Bromelain, an enzyme derived from pineapple stems, also supports healthy immune system function. The combination of Quercetin and Bromelain therefore provides powerful immunomodulating benefits important for the management of occasional seasonal discomfort.
    HerbsPro: Super Quercetin, BlueBonnet Nutrition, 500 mg, 30 VCaps (100598)
    HerbsPro: Quercetin Plus Vitamin C & Citrus Bioflavonoids, Natrol, 500 mg, 50 Caps (16833)
    HerbsPro: Quercetin Plus C, TwinLab, 500 mg / 1400 mg, 50 Caps (19840)
    HerbsPro: Super Quercetin, BlueBonnet Nutrition, 500 mg, 60 VCaps (100599)
    Super Quercetin Vcaps provide a potent combination of antioxidants and allergy-supporting natural ingredients. Each serving (2 capsules) contains quercetin (1000 mg), vitamin C from pure L-ascorbic acid (500 mg), rose hips (25 mg), acerola (25 mg), rutin (20 mg), citrus bioflavonoid complex (1000 mg), pineapple bromelain (140 mg), and hesperidin (40 mg). Available in easy-to-swallow vegetable capsules for maximum assimilation and absorption.
    HerbsPro: Quercetin Plus (Vitamin C), Olympian Labs, 500 mg / 100 mg, 60 Caps (74414)
    HerbsPro: Quercetin Plus C, TwinLab, 500 mg / 1400 mg, 100 Caps (19841)
    HerbsPro: Quercetin, A Bioflavonoid Antioxidant, Jarrow Formulas, 500 mg, 100 Caps (1228)
    HerbsPro: Quercetin, A Bioflavonoid Antioxidant, Jarrow Formulas, 500 mg, 200 Caps (1227)


    LIFE EXTENSION PRODUCTS

    LEF: Optimized Quercetin, Life Extension, 250 mg, 60 VCaps
    Quercetin is a bioflavonoid that supports cellular health and function. In human cell culture studies, it has been shown to block te manufacture and release of inflammation-causing substances.
    LEF: Quercetin-500, Jarrow Formulas, 500 mg, 100 Caps


    TAKEHERB PRODUCTS

    TakeHerb: Activated Quercetin, Source Naturals, 1000 mg, 200 Tabs
    TakeHerb: Activated Quercetin Capsule, Source Naturals, 50 Caps
    TakeHerb: Activated Quercetin, Source Naturals, 1000 mg, 100 Tabs
    TakeHerb: Activated Quercetin Capsule, Source Naturals, 100 Caps
    TakeHerb: Activated Quercetin, Source Naturals, 1000 mg, 50 Tabs
    TakeHerb: Activated Quercetin Capsule, Source Naturals, 50 Caps


    KALYX PRODUCTS

    Kalyx: Quercetin, Natrol, 250 mg, 50 Caps: K
    Kalyx: Quercetin, Nutricology, 300 mg, 60 VCaps: N
    Kalyx: Quercetin, Natrol, 500 mg, 50 Caps: HF
    Kalyx: Quercetin Plus C, TwinLab, 500 mg/1400mg, 50 Capsules: HF
    Kalyx: Quercetin With Bioflavonoids, Nutricology, 100 VCaps: N
    Quercetin extracted from a non-citrs source and other bioflavonoids extracted from lemon are found in the classical bioflavonoid group of nutritional supplements. They have been shown to support the integrity of mast cells, which play a key role in controlling the release of histamine. Bioflavonoids potentially support the health of the vascular system. Quercetin may also reduce the production of prostaglandins and leukotrines. A serving contains 800 mg Lemon Bioflavonoid Complex, 100 mg Quercetin, 100 mg Hesperidine, 100 mg Rutin. Take one to two capsules one to three times daily with meals or as directed by your health care provider.


    AMAZON PRODUCTS

    Amazon: Quercetin Supplement Products
    Amazon: Activated Quercetin Supplement Products

  • Nutrition Basics: Quercetin & Activated Quercetin Supplement Information



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    AROMATHERAPY: ESSENTIAL OILS DESCRIPTIONS & USES


    Allspice Leaf Oil
    Angelica Oil
    Anise Oil
    Baobab Oil
    Basil Oil
    Bay Laurel Oil
    Bay Oil
    Benzoin Oil
    Bergamot Oil
    Black Pepper Oil
    Chamomile (German) Oil
    Cajuput Oil
    Calamus Oil
    Camphor (White) Oil
    Caraway Oil
    Cardamom Oil
    Carrot Seed Oil
    Catnip Oil
    Cedarwood Oil
    Chamomile Oil
    Cinnamon Oil
    Citronella Oil
    Clary-Sage Oil
    Clove Oil
    Coriander Oil
    Cypress Oil
    Dill Oil
    Eucalyptus Oil
    Fennel Oil
    Fir Needle Oil
    Frankincense Oil
    Geranium Oil
    German Chamomile Oil
    Ginger Oil
    Grapefruit Oil
    Helichrysum Oil
    Hyssop Oil
    Iris-Root Oil
    Jasmine Oil
    Juniper Oil
    Labdanum Oil
    Lavender Oil
    Lemon-Balm Oil
    Lemongrass Oil
    Lemon Oil
    Lime Oil
    Longleaf-Pine Oil
    Mandarin Oil
    Marjoram Oil
    Mimosa Oil
    Myrrh Oil
    Myrtle Oil
    Neroli Oil
    Niaouli Oil
    Nutmeg Oil
    Orange Oil
    Oregano Oil
    Palmarosa Oil
    Patchouli Oil
    Peppermint Oil
    Peru-Balsam Oil
    Petitgrain Oil
    Pine-Long Leaf Oil
    Pine-Needle Oil
    Pine-Swiss Oil
    Rosemary Oil
    Rose Oil
    Rosewood Oil
    Sage Oil
    Sandalwood Oil
    Savory Oil
    Spearmint Oil
    Spikenard Oil
    Swiss-Pine Oil
    Tangerine Oil
    Tea-Tree Oil
    Thyme Oil
    Vanilla Oil
    Verbena Oil
    Vetiver Oil
    Violet Oil
    White-Camphor Oil
    Yarrow Oil
    Ylang-Ylang Oil
    Aromatherapy
    Healing Baths For Colds
    Aromatherapy
    Herbal Cleansers
    Using Essential Oils


    AROMATHERAPY: HERBAL & CARRIER OILS DESCRIPTIONS & USES


    Almond, Sweet Oil
    Apricot Kernel Oil
    Argan Oil
    Arnica Oil
    Avocado Oil
    Baobab Oil
    Black Cumin Oil
    Black Currant Oil
    Black Seed Oil
    Borage Seed Oil
    Calendula Oil
    Camelina Oil
    Castor Oil
    Coconut Oil
    Comfrey Oil
    Evening Primrose Oil
    Flaxseed Oil
    Grapeseed Oil
    Hazelnut Oil
    Hemp Seed Oil
    Jojoba Oil
    Kukui Nut Oil
    Macadamia Nut Oil
    Meadowfoam Seed Oil
    Mullein Oil
    Neem Oil
    Olive Oil
    Palm Oil
    Plantain Oil
    Plum Kernel Oil
    Poke Root Oil
    Pomegranate Seed Oil
    Pumpkin Seed Oil
    Rosehip Seed Oil
    Safflower Oil
    Sea Buckthorn Oil
    Sesame Seed Oil
    Shea Nut Oil
    Soybean Oil
    St. Johns Wort Oil
    Sunflower Oil
    Tamanu Oil
    Vitamin E Oil
    Wheat Germ Oil





    HELPFUL RELATED MOONDRAGON NUTRITION BASICS LINKS

  • MoonDragon's Nutrition Basics Index
  • MoonDragon's Nutrition Basics: Amino Acids Index
  • MoonDragon's Nutrition Basics: Antioxidants Index
  • MoonDragon's Nutrition Basics: Enzymes Information
  • MoonDragon's Nutrition Basics: Herbs Index
  • MoonDragon's Nutrition Basics: Homeopathics Index
  • MoonDragon's Nutrition Basics: Hydrosols Index
  • MoonDragon's Nutrition Basics: Minerals Index
  • MoonDragon's Nutrition Basics: Mineral Introduction
  • MoonDragon's Nutrition Basics: Dietary & Cosmetic Supplements Index
  • MoonDragon's Nutrition Basics: Dietary Supplements Introduction
  • MoonDragon's Nutrition Basics: Specialty Supplements
  • MoonDragon's Nutrition Basics: Vitamins Index
  • MoonDragon's Nutrition Basics: Vitamins Introduction


  • NUTRITION BASICS ARTICLES

  • MoonDragon's Nutrition Basics: 4 Basic Nutrients
  • MoonDragon's Nutrition Basics: Avoid Foods That Contain Additives & Artificial Ingredients
  • MoonDragon's Nutrition Basics: Is Aspartame A Safe Sugar Substitute?
  • MoonDragon's Nutrition Basics: Guidelines For Selecting & Preparing Foods
  • MoonDragon's Nutrition Basics: Foods That Destroy
  • MoonDragon's Nutrition Basics: Foods That Heal
  • MoonDragon's Nutrition Basics: The Micronutrients: Vitamins & Minerals
  • MoonDragon's Nutrition Basics: Avoid Overcooking Your Foods
  • MoonDragon's Nutrition Basics: Phytochemicals
  • MoonDragon's Nutrition Basics: Increase Your Consumption of Raw Produce
  • MoonDragon's Nutrition Basics: Limit Your Use of Salt
  • MoonDragon's Nutrition Basics: Use Proper Cooking Utensils
  • MoonDragon's Nutrition Basics: Choosing The Best Water & Types of Water





  • RELATED MOONDRAGON HEALTH LINKS & INFORMATION

  • MoonDragon's Nutrition Information Index
  • MoonDragon's Nutritional Therapy Index
  • MoonDragon's Nutritional Analysis Index
  • MoonDragon's Nutritional Diet Index
  • MoonDragon's Nutritional Recipe Index
  • MoonDragon's Nutrition Therapy: Preparing Produce for Juicing
  • MoonDragon's Nutrition Information: Food Additives Index
  • MoonDragon's Nutrition Information: Food Safety Links
  • MoonDragon's Aromatherapy Index
  • MoonDragon's Aromatherapy Articles
  • MoonDragon's Aromatherapy For Back Pain
  • MoonDragon's Aromatherapy For Labor & Birth
  • MoonDragon's Aromatherapy Blending Chart
  • MoonDragon's Aromatherapy Essential Oil Details
  • MoonDragon's Aromatherapy Links
  • MoonDragon's Aromatherapy For Miscarriage
  • MoonDragon's Aromatherapy For Post Partum
  • MoonDragon's Aromatherapy For Childbearing
  • MoonDragon's Aromatherapy For Problems in Pregnancy & Birthing
  • MoonDragon's Aromatherapy Chart of Essential Oils #1
  • MoonDragon's Aromatherapy Chart of Essential Oils #2
  • MoonDragon's Aromatherapy Tips
  • MoonDragon's Aromatherapy Uses
  • MoonDragon's Alternative Health Index
  • MoonDragon's Alternative Health Information Overview
  • MoonDragon's Alternative Health Therapy Index
  • MoonDragon's Alternative Health: Touch & Movement Therapies Index
  • MoonDragon's Alternative Health Therapy: Touch & Movement: Aromatherapy
  • MoonDragon's Alternative Therapy: Touch & Movement - Massage Therapy
  • MoonDragon's Alternative Health: Therapeutic Massage
  • MoonDragon's Holistic Health Links Page 1
  • MoonDragon's Holistic Health Links Page 2
  • MoonDragon's Health & Wellness: Nutrition Basics Index
  • MoonDragon's Health & Wellness: Therapy Index
  • MoonDragon's Health & Wellness: Massage Therapy
  • MoonDragon's Health & Wellness: Hydrotherapy
  • MoonDragon's Health & Wellness: Pain Control Therapy
  • MoonDragon's Health & Wellness: Relaxation Therapy
  • MoonDragon's Health & Wellness: Steam Inhalation Therapy
  • MoonDragon's Health & Wellness: Therapy - Herbal Oils Index







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    MOONDRAGON'S REALM - WEBSITE DIRECTORY


    A website map to help you find what you are looking for on MoonDragon.org's Website. Available pages have been listed under appropriate directory headings.




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