Quercetin

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The Doctor's Vitamin and Mineral Encyclopedia Sheldon Saul Hendler See book keywords and concepts

The bioflavonoids quercetin, hesperidin and catechin have been found to have anti-viral activity against herpes type I, respiratory syncytial virus and para-influenza virus in vitro. There are anecdotes that bioflavonoids can cure colds, but there has been no scientific documentation of this. But because of the test-tube anti-viral activity of some bioflavonoids against rhinoviruses, clinical trials to determine what effect bioflavonoids might have in the treatment and prevention of colds should be conducted.

The Constituents of Medicinal Plants: An Introduction to the Chemistry and Therapeutics of Herbal Medicine Andrew Pengelly See book keywords and concepts

Role in plant physiology Flavonoids are universal within the plant kingdom—they are the most common plant pigments next to chlorophyll and carotenoids. They are recognised as the pigments responsible for autumnal leaf colours as well as for the many shades of yellow, orange and red in flowers. Their functions include protection of plant tissues from damaging UV radiation, acting as antioxidants, enzyme inhibitors, pigments and light screens.

Nature's Medicines : From Asthma to Weight Gain, from Colds to High Cholesterol -- The Most Powerful All-Natural Cures Gale Maleskey See book keywords and concepts

Take 1,000 to 2,000 milligrams of quercetin or 100 to 200 milligrams of grapeseed extract daily, says Jennifer Brett, N.D., a naturopathic doctor at the Wilton Naturopathic Center in Stratford, Connecticut. Folic Acid Treatment Several studies have shown that folic acid can reduce inflammation, bleeding, and plaque buildup on the teeth when taken in pill form or used as a mouthwash. Research has also shown that it can help treat periodontitis, the advanced stage of gum disease. "Folic acid is a B vitamin that keeps the cells in your mouth healthy.

Food Your Miracle Medicine Jean Carper See book keywords and concepts

Food Chemicals with Antiviral Activity Glutathione (asparagus, avocado, watermelon, broccoli, oranges), lentinan (shiitake mushrooms), quercetin (red and yellow onions, red grapes, broccoli, yellow summer squash), protease inhibitors (beans, com, nuts, seeds). CARMINATIVES: HOW FOOD MAY RELIEVE INTESTINAL GAS Herbs and spices have long been used in ancient medicine as carminatives, agents that help expel gas, relieving flatulence. The main pharmacological agent is thought to be oils in the plants that relax smooth muscles, letting gas escape.

Nature's Medicines : From Asthma to Weight Gain, from Colds to High Cholesterol -- The Most Powerful All-Natural Cures Gale Maleskey See book keywords and concepts

Janson, quercetin reduces the activity of an enzyme that leads to these deposits. When the deposits are reduced, there's less risk of developing cataracts. Finally, bioflavonoids are believed by some to enhance vitamin C activity in situations where the vitamin alone is ineffective and to improve the strength of blood vessels and connective tissue. You can get the benefit of those actions in a number of ways. Stronger blood vessels mean less bruising and offer some protection against the development of varicose veins and hemorrhoids. There's also less chance of developing bleeding gums.

Healing Pets With Nature's Miracle Cures Henry Pasternak, D.V.M., C.V.A. See book keywords and concepts

Among the most prominent are vitamin C and various bioflavonoids such as quercetin, naringin, and hesperidin.12 It is obvious that ARIs prevent complications in the diabetic patient. Quercitin appears to be the most potent physiologically active bioflavonoid. Remember, natural vitamin C (not ascorbic acid) is in part composed of bioflavonoids. Glucose Tolerance Factor (GTF) Foods rich in glucose tolerance factor (GTF) include nutritional yeast, liver, whole grains, eggs, buckwheat, mushrooms, beets, prunes, nuts, and potatoes with skin.

The Doctor's Vitamin and Mineral Encyclopedia Sheldon Saul Hendler See book keywords and concepts

It has also been found that vitamin C itself protects the bioflavonoid quercetin from oxidation. There is no good evidence that bioflavonoids enhance the absorption and utilization of vitamin C in the human body. In fact, there is even one study that showed synthetic vitamin C to be better absorbed and utilized by the body than either vitamin C teamed with the bioflavonoid rutin or "natural" vitamin C in the form of orange juice. Now let's fast-forward to the 1980s, which can be called the renaissance of the bioflavonoids.

Earl Mindell's Supplement Bible: A Comprehensive Guide to Hundreds of NEW Natural Products that Will Help You Live Longer, Look Better, Stay Heathier, ... and Much More! Earl Mindell, R.Ph., Ph.D. See book keywords and concepts

If you don't eat an onion or two daily, take quercetin supplements. Possible Benefits Strengthens capillaries, promotes good circulation. Is a powerful anticancer compound. Is a natural anti-inflammatory agent. Can relieve allergic symptoms. The Right Amount Take one 400-mg. capsule before each meal. Red Wine Polyphenols It's been called the French Paradox. 1aen though rliev gorge on cheese and goose liver pate, drench dieir food in cream sauce, eat other high-fat foods with abandon, and smoke like chimneys, the French have one of the lowest rates of heart disease in the world.

Bioflavonoids are meant to work together, and not surprisingly, rutin supplements often include other bioflavonoids such as quercetin and hesperidin. Bioflavonoids in general, and rutin in particular, can strengthen capillaries, the tiniest blood vessels. Rutin is essential for the proper absorption and use of vitamin C and assists vitamin C in maintaining collagen, the tissue beneath the skin that supports the epidermis, the outer layer of cells. The most popular use for rutin is as a treatment for allergies.

It contains several compounds, including the flavonoid quercetin, which can improve circulation of blood throughout the body. As I mentioned in the section "Supplements to Jump-Start Your Sex Life," poor circulation is a major cause of sexual problems in men. Look for horny goat weed in male potency herbal products as well as products for cardiovascular health. Immature Bitter Orange A member of the citrus family, this herb has been used to treat digestive problems, coughs, allergies, and inflammatory conditions.

Facts Closely related to rutin (see page 1371 and hesperidin, quercetin is fast becoming a superstar among the bioflavonoid;). Discovered in the 1930s by Nobel Prize Laureate Albert Szent-Gzorgy, who called them vitamin P, bioflavonoids have had a rocky history. Szent-Gzorgy reported that these substances could strengthen capillaries (tiny blood vessels) and improve circulation. At one time, physicians prescribed bioflavonoids for bleeding gums and circulatory problems. In 1968, for reasons that now seem nothing less than lunatic, the FDA deemed bioflavonoids to be worthless.

Eat and Heal (Foods That Can Prevent or Cure Many Common Ailments) the Editors of FC&A Medical Publishing See book keywords and concepts

Thanks to the powerful flavonoid quercetin and a host of sulfur compounds, onions can make anyone a winner. Onions, which also have some potassium, vitamin C, and B vitamins, kill germs, help your heart, and fight cancer. Plus, they add great flavor and a pleasant aroma to almost any dish. Peel an onion and start chopping. When you think of the onion's delicious taste and mighty health powers, the only tears you'll cry will be tears of joy. 3 ways onions keep you healthy Zaps heart disease. Japanese women rarely get heart disease.

There's proof of this in a study of Japanese women who ate foods high in quercetin. They were less likely to get coronary heart disease than other women and they had lower levels of total and LDL, or bad, cholesterol. Strikes at the heart of strokes. Apples are even a smart choice for helping avoid strokes. Scientists aren't sure which ingredient in this multi-talented fruit to credit, but the connection is clear — people who regularly eat apples are less likely to have strokes than people who don't. Protects your joints.

Resvera-trol in grapes, anthocyanins in cranberry juice, and quercetin in onions, apples, and tea are some of the flavonoids that help your heart and arteries. Monounsaturated fat. To keep your blood running smoothly, maybe you need an oil change. Olive oil, the main source of fat in the heart-healthy Mediterranean diet, has mostly monounsaturated fat. This type of fat slashes the "bad" cholesterol without harming the "good" cholesterol. It also prevents clotting, giving your arteries even more protection. Like fiber, monounsaturated fat also fills you up so you're less likely to overeat.

Cherry's antioxidants include its anthocyanins as well as quercetin, a powerful flavonoid also found in apples and onions. German studies of large numbers of fruits and vegetables found even more evidence. In one study, sweet cherries had some ability to counter two known clastogens, substances that can damage your chromosomes and potentially cause cancer. In another, both sweet and sour cherries were found to protect genes from mutations that can lead to cancer.

The Doctor's Vitamin and Mineral Encyclopedia Sheldon Saul Hendler See book keywords and concepts

Several studies, performed on cells in vitro, show that quercetin and other bioflavonoids are potent anti-inflammatory agents. They appear to inhibit formation of inflammatory prostaglandins and leukotrienes, the release of inflammatory mediators by cellular lysosomes and lipid peroxidation. Once more, clinical trials are called for. Still other bioflavonoid activities which have recently been demonstrated include anti-spasmodic activity (decreases smooth-muscle contractility), immunomodulation and, once again, reduction of capillary fragility. So far, so good. There is a downside, though.

The Complete Guide to Health and Nutrition Gary Null See book keywords and concepts

And last but not least, vitamin P, a group of elements called bioflavonoids with names like rutin, citrin, hesperidin, and quercetin. Let's meet the vitamins. Vitamin A: Nutrient for Total Health What Is Vitamin A? Vitamin A plays an astounding number of roles in maintaining your day-to-day health. Important in keeping skin and teeth healthy, vitamin A is also a watchdog against infections of the respiratory and urinary tracts. It plays an important part in keeping your reproductive system reproducing, your ears hearing, and your eyes seeing. It even helps to build your genetic material.

Choices in Healing: Integrating the Best of Conventional and Complementary Approaches to Cancer Michael Lerner See book keywords and concepts

The therapy consists of a low fat, high carbohydrate nutritional regimen and three nontoxic medications—Lente insulin (an insulin zinc preparation), quercetin, and thyroid hormone. In theory, these components combine to starve tumor cells and boost acidity to lethal levels within the targeted cells. Immusyn C is also available at the Hospital. According to hospital literature, Immusyn C is a chemotherapeutic agent selectively toxic only to cancer cells that can be used alone or in combination with other chemotherapies or radiation.

The Woman's Encyclopedia of Natural Healing Dr. Gary Null See book keywords and concepts

An article recommends the following supplements for incorporation into the interstitial cystitis treatment protocol: vitamins C, D, B12, and B6, as well as bioflavonoids, zinc, vitamin K, calcium, magnesium, quercetin, EFA's Calc Sulph and Kali Sulph cell salts, Zea mays (sweet corn), cranberry, and kava kava. Diathermy, sitz baths, and Kegel exercises may also help. T. Hudson, "Interstitial Cystitis," Townsend Letter for Doctors and Patients (December 1995): 128-29. VAGINAL YEAST SYNDROME (CANDIDIASIS) Dr.

The Encyclopedia of Medicinal Plants Andrew Chevallier See book keywords and concepts

Constituents Linden contains flavonoids (especially quercetin and kaempferol), caffeic and other acids, mucilage (about 3%), tannins, volatile oil (0.02-0.1%), and traces of benzodiazepine-like compounds. The flavonoids improve circulation. History & Folklore Greek myth recounts how Philyra, a nymph, was raped by the god Saturn in the guise of a horse, and eventually gave birth to the famed centaur, Cheiron. Philyra was so devastated that she begged the gods not to leave her among mortals. The gods granted her wish by transforming her into a linden tree.

The Encyclopedia of Psychoactive Plants: Ethnopharmacology and Its Applications Christian Ratsch See book keywords and concepts

The leaves of the American plant contain the flavones myricetin and quercetin (cf. Psidium guajava, Vaccinium uliginosum) as well as arbutin, hydrochinone, and gallic acid (Veit et al. 1992). A closely related Mexican species, Arctostaphylos arguta (Zucc.) DC., is known in the local vernacular as madrono borracho ("drunken strawberry tree"), which may indicate a possible psychoactive activity (Martinez 1994, 205*). One very popular admixture is the inner bark of Cornus stolonifera Michx., which is also often smoked by itself and is also known by the name kinnikinnik (Johnston 1970, 317*).

In addition to the essential oil, the herbage also contains sesquiterpene lactones, glycosides of camphor oil, tanning agents, and quercetin (cf. Acacia spp., Psidium guajava, Vaccinium uli-ginosum, kinnikinnick) (Proksch and Wissinger-Grafenhahn 1992, 361). Effects The extremely bitter wormwood tea has been demonstrated to soothe the stomach (Hoffmann et al. 1992, 37*). The pharmacological effects of thujone, which is chemically related to camphor (see Cinnamomum camphora) and pinene, are very similar to those of THC (Castillo et al. 1975).

The leaves also contain quercetin and camphor oil derivatives and coumarins (scopo-letin) (Lindequist 1992,423*). Atropa aborescens [nom. nud.?] This species, collected in Martinique, "contains narcotic poisonous substances" (von Reis and Lipp 1982,266*). Atropa acaulis L. Synonym for Mandragora officinarum Atropa acuminata Royle ex Lindl. [syn. Atropa belladonna var. acuminata, Atropa belladonna C.B. Clarke non. L.]—Indian belladonna, sagangur This species occurs only in the Indian districts of Barmula, Kinnaur, Simla, and Nainital.

Myricetin, dihydromyricetin, and quercetin glycosides from Catha edulis. Journal of Natural Products 49 (1): 172. Muses, Charles. 1989. The sacred plant of ancient Egypt. In Gateway to inner space, ed. C. Ratsch, 143-58. Bridport, England: Prism Press. Pehek, E., M. Schlechter, and B. Yamamoto. 1990. Effects of cathinone and amphetamine on the neurochemistry of dopamine in vivo. Neuropharmacology 29:1171-76. Qedan, S. 1972. Uber das atherische Ol von Catha edulis. Planta Medica 21:410-15. Remann, Micky. 1995. Der Globaltrottel. 2nd ed. Der Griine Zweig 177.

The entire plant contains traces of caffeic acid, quercetin, camphor oil, and leucocyanidin (Chaurasia 1992, 896). Effects In the medical and toxicological literature, one repeatedly reads that high dosages of camphor can induce hallucinations (Morton 1977, 107*): After ingestion of app. 1.2 g, the following can appear: a pleasant feeling of warmth of the skin and a general stimulation of the nerves, a need for movement, a tingling in the skin, and a peculiar, inebriation-like, ecstatic, mental excitement.

The Woman's Encyclopedia of Natural Healing Dr. Gary Null See book keywords and concepts

I was also prescribed huge amounts of bioflavonoids, as well as quercetin, essential fatty acids, and lecithin. I also used magnets, which were great. Not only did they help the lymphatic drainage, but they freed me from pain. I applied those to my legs—first ceramic magnets, and afterward electro-magnets. These really helped with circulation and healing. I had great relief and was once again able to walk normally instead of dragging my feet.

The Complete Guide to Health and Nutrition Gary Null See book keywords and concepts

Around the same time, it was discovered that rutin and quercetin particularly act to lower cholesterol levels in the blood.22 Here's how the point was proved: researchers put groups of rats on diets that would normally induce heart disease. Some groups were also given vitamin P, and these rats lived much longer than the rats who got the fatty diets without bioflavonoids. In the rats who ate bioflavonoids, there was increased blood stability and improved circulation, as well as lowered cholesterol levels.

The Woman's Encyclopedia of Natural Healing Dr. Gary Null See book keywords and concepts

Other nutrients that directly enhance the immune system include garlic, quercetin, zinc gluconate, buffered vitamin C, and beta carotene or vitamin A. In addition. 500 mg of the amino acid L-lysine, taken 2 to 4 times a day, can produce excellent results. Bee propolis is anti-inflammatory, while B vitamins combat stress. Also good are bee pollen, blue-green algae, and pycnogenol. Nervous system stressors, such as caffeine, alcohol, and hard-to-digest foods like meat, should be avoided, especially at the onset of an attack.

The Complete Guide to Health and Nutrition Gary Null See book keywords and concepts

Hesperidin is a bioflavonoid found in the skins and peels of citrus fruits. quercetin and rutin are names for two individual members of the bioflavonoid family. Rutin, which occurs in buckwheat, is sometimes sold separately. Trioexethyl-rutin is a rutin-related flavonoid effective in the treatment of hemorrhoids. Vitamin C complex or C-2 is used to describe the inseparable partnership of the flavones and vitamin C. Vitamin P symbolizes the positive effects that bioflavonoids have on the permeability of the capillaries. Confused? Don't feel bad.

Other bioflavonoids include citrin, hesperidin, and quercetin. Together they improve the resiliency of your capillaries, mend needy cells, prevent bleeding, and stop it quickly when you are injured. Doctors began using bioflavonoids in treating specific conditions about fifty years ago, when they noticed that something other than vitamin C in a compound extracted from red peppers and lemon juice was helping to heal patients with vascular problems. Dr. Albert Szent-Gyorgyi identified the substance as citrin.

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