Why does the body need quercetin?

Quercetin - a natural flavonoid, which has a mass of useful properties. It is found in some foods and is part of the biologically active additives. And for what such a substance is necessary for the human body, what functions does it perform? Let's figure it out!

What does quercetin do?

Quercetin is not an indispensable and obligatory substance to use, but still scientists have found that this component has many useful properties. And therefore it is often included in the composition of dietary supplements and is actively used in alternative medicine, as well as as an adjunct to medicinal preparations.

The use of quercetin for the body is its following properties:

  • Quercetin is a powerful natural antioxidant that neutralizes the destructive and dangerous activity of free radicals. This effect allows you to stop the oxidation of tissues, slow their aging and prevent mutation and damage to cells.
  • The substance protects the vessels from damage and sprains, increases their tone and provides prevention of atherosclerosis. In addition, the level of "bad" cholesterol is normalized.
  • Quercetin has a pronounced anti-inflammatory effect and helps to stop inflammation and accelerate tissue repair.
  • The substance contributes to the normalization of the functioning of the cardiovascular system: stabilizes blood pressure, prevents the increase in blood clotting and the formation of blood clots, and also protects the heart muscle.
  • Quercetin has antihistamine properties and reduces the severity of allergic reactions.
  • This component has a powerful regenerating effect and accelerates the healing and repair of tissues in various inflammatory diseases and injuries.
  • Quercetin increases the activity of cells of the immune system, which strengthens the natural protective barrier, increases the body's resistance to attacks of bacteria, fungi and viruses, and also reduces the incidence of SARS, influenza and other infections.
  • Such a substance can be used for the prevention of cancer.

Consumption rate and special instructions

The study found that the dosage for children aged 7-18 years is about 150-250 milligrams of quercetin per day, and for adults - about 300-400.But the symptoms of deficiency are unknown, so it is unclear how the body can react to the lack of substance. With worsening living conditions or obvious health problems, the dose may be increased.

Abuse of quercetin can cause harm. In case of overdose, allergies may appear. Undesirable reactions are possible with individual hypersensitivity to the substance. Side effects also usually manifest themselves as local signs, such as urticaria. If you notice deterioration of health or unpleasant symptoms, then it is better to stop taking supplements containing quercetin.

Simultaneous intake with ascorbic acid enhances the effect of drugs. And the use of anti-inflammatory drugs increases their effectiveness.

How can I get?

Quercetin contains the following products: buckwheat, onions and garlic (especially husks), red grapes and wine, apples, cabbage (especially broccoli), peppers, citrus, tea, leafy vegetables, nuts, some honey, olive oil, tomatoes, cocoa , legumes, asparagus, as well as some berries: cranberries, lingonberries, cherries, raspberries, blueberries, mountain ash, sea buckthorn.Also, the substance is found in certain plants: a golden whisker, elder, sage, St. John's wort, ginkgo biloba.

In what cases is shown and contraindicated supplement with quercetin?

The instructions for use attached to the supplement on the basis of quercetin indicate the following indications for use:

  • inflammatory diseases of the oral cavity, for example, stomatitis, gingivitis, periodontal disease;
  • purulent diseases of the skin or soft tissues;
  • erosive or ulcerative lesions of the mucous membranes;
  • radiation exposure, irradiation;
  • adverse or harmful conditions of work or residence;
  • osteochondrosis;
  • menopause;
  • duodenal or gastric ulcer;
  • diseases of the cardiovascular system: angina, heart failure, ischemia.

Contraindications are few, these include periods of pregnancy and breastfeeding, a tendency to allergic reactions, individual hypersensitivity, as well as children under the age of twelve years (data on research results and safety are not available).


Take dietary supplements - not the only way to get quercetin, there are natural products. Consider a few recipes:

  1. Will help get quercetin germinated green buckwheat. Take a glass of this product, rinse and fill with three glasses of warm water, leave for two hours. Then put the seeds on damp cotton wool or gauze and leave for two or three days. When the length of sprouts reaches 1-1.5 centimeters, the product is ready for use. It can be eaten before each meal in a tablespoon.
  2. Prepare a decoction of onion peel. To do this, fill it with a glass, pour two glasses of freshly boiled water, boil for ten minutes, strain and take two or three tablespoons after a meal. This tool can be added to green tea.
  3. When cooking soup, you can put in it a whole onion with husk, and then remove it. This technique is allowed to use when cooking other hot dishes.
  4. Drink more berry fruit drinks, they also contain quercetin, especially prepared from cowberries, mountain ash, sea buckthorn, raspberries.
  5. Eat vegetable salads from peppers, tomatoes, and broccoli seasoned with olive oil. You can also add oil to other dishes or take a tablespoon on an empty stomach daily.

Now you know what quercetin is for and how to get it from products.

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