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|Assay Method:||HPLC-MS, GPC, HPLC, UV|
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|Application:||Food, Health Care Products, Medicine|
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Quercetin, also called quercetin, is a bioflavonoid and a natural pigment found in all herbs, fruits and vegetables. Quercetin is also one of the most powerful and effective herbal anti-inflammatory and antioxidant supplements available.
Quercetin is widely present in the stem bark, flowers, leaves, buds, seeds, and fruits of many plants, mostly in the form of glycosides, such as rutin, quercetin, hypericin, etc., and quercetin can be obtained by acid hydrolysis cortex. Among them, the content is higher in the stems and leaves of buckwheat, sea buckthorn, hawthorn and onion. Quercetin is also found in many foods, such as onions, shallots, asparagus, cabbage, mustard greens, green peppers, endive, grapefruit, lettuce, hawthorn, apples, mangoes, plums, radishes, blackcurrants, potatoes, and spinach. . In addition, about 100 kinds of medicinal plants (such as Sophora japonica, Arborvitae, Galangal, Coltsfoot, Mulberry, Panax notoginseng, Ginkgo, elderberry, etc.) contain this ingredient.
The content of quercetin in various fruits and vegetables
|Types of fruits and vegetables||Quercetin content/(mg/kg)||Types of fruits and vegetables||Quercetin content/(mg/kg)|
|Apple||58~263 (peel)||potato||770~1000 (leaf)|
|pear||28 (peel)||tomato||420 (leaves grown in open air)|
|Bell peppers||63 (outer layer)|
|kale||7 (corm rind)|
25 (leaves growing in the air)
|kale||50 (grown in open air)|
35 (grown in greenhouse)
125~130 (seedless pods)
|green potato||47 (leather)||broad bean||1340 (leaf)|
36 (seedless pods)
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