Quercetin is a flavonol compound with a variety of biological activities. It is widely present in the stem bark, flower, leaf, bud, seed, and fruit of many plants, mostly in the form of glycosides, such as rutin, quercetin, Hyperin, etc., quercetin can be obtained by acid hydrolysis. Among them, the content is higher in buckwheat stems and leaves, sea buckthorn, hawthorn, and onion. Quercetin is also found in many foods, such as onions, shallots, asparagus, cabbage, mustard greens, green peppers, chicory, grapefruit, lettuce, hawthorn, apples, mangoes, plums, radishes, blackcurrants, potatoes and spinach, etc.

What are the effects of quercetin?

Quercetin can resist free radicals, complex or capture free radicals to prevent lipid peroxidation in the body; it can directly inhibit tumors, and effectively exert anti-cancer and anti-cancer effects; in terms of antibacterial, anti-inflammatory, anti-allergic, and prevention of diabetes complications It also has strong biological activity. Quercetin is non-toxic, so it is of great significance to the treatment and prevention of cancer, aging, and cardiovascular diseases, and has great development value. Red wine, which is good for health, is also related to its inclusion of this antioxidant. Flavonoids such as quercetin are generally considered to be good for health, and such nutrients are often recommended to promote overall health. Flavonoids are water-soluble, so it is easier to excrete the excess when ingested in excess. In addition to these positive effects, some serious side effects related to excessive intake of quercetin have also been reported.

Nutritional supplements containing quercetin are often used to treat eye diseases caused by allergies, diabetes, cataracts or retinal problems, atherosclerosis, and are even recommended as anti-aging treatments. Different nutritional products contain different amounts of quercetin, but it is generally believed that 500-1500 mg per day is the most beneficial to health.


What are the applications of quercetin?

1. As antioxidants are mainly used for fats, beverages, cold drinks, meat processing products.

2. As a  natural dye can be used as a medium dye. For wool and cotton, aluminum salt is used to obtain yellow, chromium salt is used to obtain olive-yellow, tin salt is used to obtain orange, and iron salt is used to obtain olive green. Good soaping resistance, medium-light resistance.

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