‌Quercetin, also known as quercetin, is a widely distributed flavonoid alcohol compound with various biological activities in the plant kingdom.

Quercetin is widely found in the stem bark, flowers, leaves, buds, seeds and fruits of many plants, mostly in the form of glycosides, such as rutin, quercitrin, hyperoside, etc. Quercetin can be obtained by acid hydrolysis. Among them, the content is higher in the stems and leaves of buckwheat, seabuckthorn, hawthorn, and onion. Quercetin is also found in many foods, such as onions, shallots, asparagus, cabbage, mustard, green peppers, chicory, grapefruit, lettuce, hawthorn, apples, mangoes, plums, radishes, black currants, potatoes, and spinach. In addition, more than 100 medicinal plants (such as Sophora japonica, Platycladus orientalis leaves, Alpinia officinalis, Lonicera japonica, Morus parasiticus, Panax notoginseng, Ginkgo biloba, Elderberry, etc.) contain this ingredient.

Quercetin is a flavonoid, a class of plant pigments that help create the color of many fruits and flowers. Contains flavonoids, one of the reasons why many foods, herbs and spices have health benefits. For example, the benefits of berries, dark chocolate, and most herbal extracts, such as ginkgo biloba, grape seed, pine bark, milk thistle, etc., are thought to be directly related to the flavonoids they contain.

[Physical properties]: Dihydrate is a yellow acicular crystal (dilute ethanol) that becomes anhydrous at 95-97 ° C, with a melting point of 314 ° C (decomposition). 1g is soluble in 290ml of anhydrous ethanol, 23ml of boiling ethanol, and in glacial acetic acid. The alkaline aqueous solution is yellow and almost insoluble in water. The ethanol solution has a bitter taste.

‌‌‌‌1. Quercetin helps protect cells

Quercetin acts like an "on button" to promote beneficial effects in cells, such as cell repair, while it also acts as an "off button" to help cells protect themselves from damage or infection.

2. Quercetin helps prevent oxidation

Quercetin may have antioxidant properties or strengthen the body's enzymatic antioxidant system, which helps the body during periods of biological stress (immune priming, inflammation, and allergies).

‌‌‌‌3. Quercetin helps reduce inflammation

Quercetin controls the production and release of inflammatory mediators that make it harder for the body to balance inflammation.

4. Quercetin Helps Boost Your Body' s Ability

Quercetin is thought to have specific effects on immune system health and may help improve the body's airway resistance. In fact, quercetin is of particular interest because of its effects on immune function and its ability to increase levels of zinc ions in cells. Free zinc ions control an enzyme called replicase, which viruses use to replicate in human cells. Quercetin acts as an ionophore, helping to transport zinc ions into cells.

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