What Is Quercetin And What Should You Know About It?


Quercetin has good expectorant, cough, lowering blood pressure, dilating coronary arteries, and lowering blood lipids. Clinically, it is mostly used to treat patients with chronic bronchitis, coronary heart disease, and hypertension.

Foods rich in quercetin include apple peels, oranges, oranges, grapes, peaches, blueberries, blackberries, onions, fennel, coriander, olive oil, tea, beans, etc. Therefore, eating more foods containing quercetin in daily life can better prevent cardiovascular and cerebrovascular diseases such as coronary heart disease and hypertension.

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What Foods Have The Most Quercetin In Them?

From a superficial point of view, the plants with more quercetin content include the following, the skin and leaves from Libya, the second red star anise, the third red eucalyptus, and the fourth, the leaves of the kenaf. In addition, I want to remind you that some foods are like this. Before the chemical reaction, the amount of quercetin is relatively small, but after hydrolysis, the amount of quercetin will greatly increase. Increase, for example, in the Masson pine from Guizhou, and the quercetin content is only 1.12% before hydrolysis. Its content will increase to 2.98% after hydrolysis, so if you can use it to brew tea and drink it, it will be found that the amount of quercetin contained in it will also increase a lot.

In New zealand quercetin online is believed to be not very clear to most people. It is a flavonoid. This nutrient is also an indispensable part of the human body. It would help if you started with your diet to fill your body with this substance. For conditioning, you can eat some fruits and vegetables, which are rich in quercetin, especially common fruits such as grapes and blueberries.

Quercetin is a flavonoid, a compound that can be found in plant foods. Quercetin has anti-inflammatory properties. This means that the compound could be beneficial in combating various diseases, including cancer and allergies, but these effects still need further research to confirm. There are many foods known to contain quercetin.


Fruits that contain quercetin include apple peels, citrus fruits, grapes, black cherries, and blackberries. Especially blueberries, lingonberries, and blackberries are particularly rich.

Vegetables and Herbs

Herbs and vegetables that contain quercetin include onions, fennel, leafy greens, and cilantro.

Other Food Sources

In addition to the foods above, olive oil, tea, soy foods, and red grapes are also food sources of quercetin.

Flavonoids, also known as bioflavonoids, are the most abundant type of polyphenolic compounds in the human diet and are widely found in fruits, vegetables, grains, roots, bark, flowers, tea, and red wine. To date, more than 4,000 different flavonoids have been identified.

Flavonols: The most common flavonoids, such as: quercetin, rutin. Quercetin is widely found in vegetables and fruits, with the highest content in red onions.

Flavonoids, such as luteolin and apigenin, are found in sweet peppers and celery, respectively.

Flavanones: Mainly found in citrus fruits, such as hesperidin and naringin.

Flavanols: mainly catechins, the most abundant green tea, and about half of the catechins in black tea.

Proanthocyanidins: grapes, blueberries, peanut skins, eggplant skins, pine bark, and other

purple foods and plants are rich in proanthocyanidins.

Isoflavones: Mainly distributed in soy (especially soybean, that is, soybean) food, it has been proven to have anti-breast cancer and osteoporosis effects.

Quercetin: A Health Supplement

Quercetin is generally used as a health supplement and is often used to increase immunity or prevent infection. Quercetin has a variety of effects, has good expectorant, antitussive effect, and has a certain antiasthmatic effect for the treatment of chronic bronchitis. In addition, it has the functions of lowering blood pressure, enhancing capillary resistance, reducing capillary fragility, lowering blood lipids, expanding coronary arteries, and increasing coronary blood flow . Our daily vegetables and fruits is rich in bioflavonoids, most of which are quercetin, which shows the importance of these compounds in the human diet.

In terms of anti-cancer, quercetin has been shown to have inhibitory effects on various cancer cells. As far as the specific mechanism of action is concerned, quercetin has a variety of biological effects, inhibiting various enzymes in cancer cells involved in cell proliferation and signal transduction pathways. Get Quercetin Risk free from Therastore.

On the other hand, some studies showing that quercetin has a certain synergistic effect when used in combination with common chemotherapeutic agents or radiotherapy, and has certain application prospects. For example, quercetin can act on chemosensitizing and radiosensitizing chemotherapy and also act as anti-radiation, protecting normal cells from the side effects of chemotherapy and radiotherapy, these advantages can significantly enhance its anti-cancer therapeutic effect.

However, in the list of carcinogens published by the International Agency for Research on Cancer of the World Health Organization in October last year, quercetin, an extract of oak tree, was listed in the list of three types of carcinogens. In fact, class 3 carcinogens have a different meaning than what we usually understand as carcinogens. Category 3 carcinogens refer to the fact that the available evidence cannot confirm human carcinogenicity, that is, the evidence of carcinogenicity is insufficient. For example, tea, caffeine, saccharin and its salts, diazepam, iron oxide, organic lead compounds, electrostatic magnetic fields, melamine, mercury and its inorganic compounds are all class 3 carcinogens. Compounds with carcinogenic potential.

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