Quercetin is a flavonol compound that is widely distributed in the plant kingdom and has a variety of biological activities. Its chemical formula is C15H10O7.
The name Quercetin has been in use since 1857 and evolved from the Latin "Quercetum", which means oak forest.
These substances are natural pigments that plants have evolved over hundreds of millions of years. In addition to giving fruits and vegetables more color, their most important role is like the immune system, which is the key to plants to resist external aggression and continue life.
Quercetin is widely present in the bark, flowers, leaves, buds, seeds, and fruits of many plants, mostly in the form of glycosides, such as rutin, quercetin, hyperoside, etc. Quercetin can be obtained by acid hydrolysis Cortex. 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. Among vegetables and fruits, quercetin content is highest in onions. The bulb color and type seems to be a determining factor for quercetin concentration in onions.
In research, it was discovered that quercetin has a variety of biological properties, including antioxidant, anti-inflammatory, antibacterial, antiviral, free radical scavenging, and immunomodulatory activities. These properties form the basis for the potential benefits of overall health and disease resistance.
Quercetin is a kind of Chinese medicinal material with a wide range of uses. This kind of Chinese medicinal material has many names, such as quercetin. It is called quercetin sphingomyelin by people in many regions. When people come to the elderly, they are called quercetin. Vascular effects will be reduced. For example, blood vessels will become fragile, residues will appear on blood vessel walls, and hyperlipidemia is very prone to occur. In order to deal with this problem, quercetin can be used.
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