Red onion: about 30mg； per 100 g;
White onion: almost, about 20 mg per100g;
Vaccinium: per100g15mg;
Green pepper: similar to blueberry ~
Kale: 7.7 mg per 100 g;
Blueberries: Every 100g 5. 1mg, I thought the blueberry content was high, after all, it was quite expensive. ......
Red apple (in the peel! Not much pulp): 4.7 mg per100g;
Lettuce, spinach and pear: 4 ~ 4.5 mg per100g.
Because the content of quercetin in different foods is quite different, the daily intake of quercetin varies greatly according to different people's eating habits. Previous surveys of Dutch people found that they all eat according to their own preferences. Some people can take dozens of milligrams of quercetin a day (healthy enough ~), while others can only take a few milligrams after three meals. Therefore, if you want to supplement quercetin, you can eat more foods rich in quercetin every day. In addition, Chinese cabbage, celery, tomatoes, cauliflower, radish, spinach, yam, onion and so on.
Quercetin, also known as quercetin and quercitrin, is soluble in glacial acetic acid, yellow in alkaline aqueous solution, almost insoluble in water, and bitter in ethanol solution. Can be used as medicine, has good expectorant and antitussive effects, and has certain antiasthmatic effects. Besides lowering blood pressure and enhancing capillary resistance,
Reduce capillary fragility, reduce blood lipid, dilate coronary artery and increase coronary blood flow. Can be used for treating chronic bronchitis. It also has adjuvant therapeutic effect on patients with coronary heart disease and hypertension. I hope my answer is helpful to you. I wish you the best of health!