quercetin

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quer·ce·tin

(kwer'sĕ-tin),
An aglycon of quercitrin, rutin, and other glycosides; occurs usually as the 3-rhamnoside; used in the treatment of abnormal capillary fragility.
Synonym(s): meletin, sophoretin

quercetin

(kwûr′sĭ-tĭn)
n.
A yellow powdered crystalline compound, C15H10O7, occurring as a glycoside in the rind and bark of numerous plants or synthesized and thought to have antihistaminic, anti-inflammatory, and antitumor properties.

quercetin

[kwur′sitin]
a yellow, crystalline, flavonoid pigment found in oak bark, the juice of lemons, asparagus, and other plants. It is used to reduce abnormal capillary fragility.

quercetin

The flavonoid alglucon of quercitrin, or rutin, and other glycosides, which is a widely distributed antioxidant present in fruits and vegetables, such as broccoli, Brussels sprouts, cabbage and oranges, as well as in rinds, barks, clover blossoms and pollen. Early data indicates that quercetin has antiviral, anti-inflammatory, and anticarcinogenic activity; it has been used for fibromyalgia, metabolic syndrome and as a monoamine oxidase inhibitor.

quercetin (kwerˑ·s·tn),

n flavonoid derived from red wine, citrus, onions, parsley, and tea. Has been used as an antioxidant, antiviral, and reported to help allergies, prostate inflammation, interstitial cystitis, atherosclerosis, and cataracts. Caution in patients taking anticoagulant or antiplatelet medications. Also called
quercetin chalcone.
References in periodicals archive ?
Onions contain a number of flavonoids, the most studied of which, quercitin, has been shown to halt the growth of tumors in animals and to protect colon cells from the damaging effects of certain cancer-causing substances.
It has large amounts of quercitin, and so it helps reduce allergic responses.
Rooibos (pronounced "roy-boss") is naturally caffeine- and tannin-free and full of polyphenols and bioflavinoids (antioxidants), calcium, fluoride, magnesium, iron, zinc, copper and potassium, as well as flavonoids, quercitin and rutin.
Control Quercitin - 500-900 mg/day in divided doses.
radical scavenging activity of PgME was found significantly higher than quercitin (p [less than or equal to] 0.
Combination of Quercitin and Rose Hip SeedOil, both assist in healing and reducing inflammation of skin.
Polyphenolic acetates DAMC and quercitin penta acetates (QPA) have indeed shown a higher toxicity compared to their parental compounds in a breast carcinoma cell line (MDA-MB-468),which could be partly attributed to the oxidative stress generated (80), suggesting thereby that the acetyl groups also contribute to the cytotoxic effects.
Examples that come readily to mind are the color and chemical instability seen with ascorbic acid or the lack of water solubility of quercitin for easy incorporation into an aqueous product.
Vitamin C is a mild antihistamine, as is quercitin, found in apples and onions.
Scientists believe the benefits could be due to the antioxidant quercitin which is found in apples and other hard fruits.
Naturally occurring 5-alpha reductase inhibitors are effective in reducing BPH, and include the herbals and nutrients such as zinc, EFAs, GLA>DHA = AA = ALA = LA, saw palmetto, beta-sitosterol, quercitin, and lycopene.
Other than Hiporamin, SBT leaves are rich source of flavonoids, terpenoids, alkaloids, polyphenols, quercitin and isorhamnetin.