|Alias||Sophoretin / Quercetine|
Quercetin, a plant flavonol from the flavonoid group of polyphenols, is found in many fruits, vegetables, leaves, and grains; red onions and kale are common foods containing appreciable content of quercetin. It has a bitter flavour and is used as an ingredient in dietary supplements, beverages, and foods.
Quercetin is a flavonoid widely distributed in nature. The name has been used since 1857 and is derived from quercetum(oak forest), after Quercus. It is a naturally occurring polar auxin transport inhibitor.
Quercetin has a good expectorant and antitussive effect and has a certain antiasthmatic effect. In addition, it also lowers blood pressure, enhances capillary resistance, reduces capillary fragility, lowers blood fat, dilates coronary arteries, and increases coronary blood flow. For the treatment of chronic bronchitis. It also has an adjuvant treatment effect on patients with coronary heart disease and hypertension.
Some laboratory studies have shown that quercetin may have anti-inflammatory properties and is studying its potential efficacy.
Quercetin can alleviate the symptoms of hay fever. One of its enzyme-modified derivatives has been found to have the effect of alleviating hot eye symptoms of pollen.
Quercetin also lowers blood pressure, enhances capillary resistance, reduces capillary fragility, lowers blood fat, dilates coronary arteries, and increases coronary blood flow. For the treatment of chronic bronchitis. It also has an adjuvant treatment effect on patients with coronary heart disease and hypertension.
Quercetin is used as an antioxidant. Mainly used in oils, beverages, cold drinks, meat processing products.
Quercetin is also a natural dye. Can be used as a media dye. It is used for wool and cotton. It is yellow with the aluminium salt, olive yellow with chromium salt, orange with tin salt, and olive green with iron salt. Good soap resistance and medium light resistance.
Used in the manufacture of organic sensitive reagents; fluorescence measurement of aluminum, photometric determination of iron, tin and zirconium. Used in the manufacture of biochemical agents, inhibitors of mitochondrial adenosine triphosphatase. Used in the manufacture of medicines. It is mixed with epichlorohydrin (3-chloro-1,2-epoxypropane) to form an epoxy resin.
Related research on the anti-tumour effect
Quercetin can significantly inhibit the action of cancer-promoting agents, inhibit the growth of isolated malignant cells, and inhibit DNA, RNA and protein synthesis in Ehrlich ascites cancer cells.
Quercetin inhibits platelet aggregation and serotonin (5-HT) release. Quercetin has a significant inhibitory effect on platelet aggregation induced by ADP, thrombin and platelet activating factor (PAF), among which PAF has the strongest inhibitory effect, and quercetin can also significantly inhibit thrombin-induced rabbit platelet 3H-5. -HT release.
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