Quercetin is a plant polyphenol from the flavonoid group, found in many fruits, vegetables, leaves, and grains. It can be used as an ingredient in supplements, beverages, or foods.

Quercetin is pentahydroxyflavone achieved from rutin which is hydrolyzed by dilute sulphuric acid. This product has functions of eliminating phlegm, relieving cough and a certain degree of relieving asthma. Meanwhile, it can reduce blood pressure, strengthen capillaries, decrease capillary fragility, reduce blood lipid, dilate coronary artery, increase blood flow of coronary artery etc. It is used for the treatment of chronic bronchitis, and the adjuvant therapy of coronary heart disease and hypertension.

1. Quercetin has good effect of expectorant, antitussive and antiasthmatic:

2. Decreasing blood pressure and blood fat;

3. Enhancing the resistance of the capillaries and reducing fragility of capillary;

4. Expanding coronary arteries and increasing coronary blood flow and so on:

5. Mainly used in the treatment of chronic bronchitis and it also has the role of adjuvant therapy in patients with coronary heart disease and high blood pressure.

There are several Similar Products available. Here are a few of the most common types:

Fenugreek Seed Extract :This product is good for kidney health and eyes,expel cold,cure abdominal distention and fullness,helps with asthma and sinus problems,regulate blood sugar and promote body building,etc.

Red Clover Extract :This product acts as antibiotic,appetite suppressant,blood purifier,depurative and relaxant,good for bacterial infections,inflamed lungs,respiratory system infections,etc.

Shiitake Mushroom Extract: This product is a powerful antiviral ingredient,enhance body immunity system,reduce phlegm,ect .