tailieunhanh - The Encyclopedia Of Nutrition And Good Health - Q

Bách khoa toàn thư - Dinh dưỡng và sức khỏe tốt - Vần Q | Q quercetin A widely distributed plant pigment that is classified as a flavonoid. It is found in fruits like apples vegetables like onions and in tea. A typical Western diet supplies about 25 mg of quercetin daily. Onions apples kale sweet cherries grapes red cabbage and green beans are good sources. Quercetin produces a broad range of effects in the body. It can function as an antioxidant to quench highly reactive chemicals called free radicals. Together with vitamin c quercetin helps strengthen fragile capillaries and connective tissue. It can inhibit tumor formation and modulate enzymes in the liver that degrade drugs pollutants and cancer-causing agents. Quercetin can reduce inflammation by blocking the formation and the release of inflammatory agents and it possesses antimicrobial activity as well. See also phytochemicals. quince Cydonia cydonia A yellow pear-shaped fruit harvested from the cydonia tree native to Iran and the Caucasus. The flesh is hard and extremely tart preventing it from being eaten raw. Quince contains high levels of pectin a gel-forming fiber. It is used in marmalades jellies jams fruit preserves and syrup as a thickening agent. One quince 151 g provides 53 calories protein g carbohydrate 14 g fiber g potassium 181 mg vitamin C 14 mg thiamin mg riboflavin mg niacin mg. See also citrus fruit. quinoa chenopodium A grain-like product unrelated to true grains. A cousin to spinach and swiss chard quinoa produces edible greens in addition to its seeds which form large clusters at the end of the stalk. Domesticated and grown in South America for 5 000 years quinoa was cultivated by the Incas. This hardy plant grows well at high elevations that experience little rainfall. Quinoa is imported from South America. Domestic supplies come from the Rocky Mountain region Colorado . The seeds are protected by a resin-like layer saponin which must be removed by treatment with alkali to be edible. The cleansed grain resembles .