Among the flavonoids, rutin (named after its occurrence in rue) is the most important. The white spots often seen covering the surface of pickled capers are said to by rutin which crystallized during the pickling procedure.
Caper flower ...
Apples are rich in flavonoids and other polyphenols, and are high in pectin, a soluble dietary fiber.
Fast Fact
Washington State grows more than half the fresh apples Americans buy in stores each year.
The primary chemical constituents of Thyme include essential oil (borneol, carvacrol, cymol, linalool, thymol), bitter principle, tannin, flavonoids (apigenin, luteolin), saponins, and triterpenic acids.
Preliminary studies indicate that certain fruits and vegetables that are grown using organic farming methods do contain higher levels of vitamins, flavonoids, polyphenolics and antioxidants.
Among substances present in summer squash are two phytochemicals, coumarins and flavonoids. The skin and rind of summer squash are rich in the nutrient beta-carotene, but the fleshy portion of this vegetable is not.
Flavones - A type of flavonoid found in various fruits and vegetables which provides the health benefits of neutralizing free radicals and possibly reducing the risk of cancer.
anthocyanidins - A type of flavonoid found in various fruits which provides the health benefits of neutralizing free radicals and possibly reducing the risk of cancer.
Carob also does not contain significant levels of flavonoids, but real chocolate contains these important antioxidants.
Antispasmodic action of flavonoid and anthraquinones," Yakugaku Zasshi vol 80 pgs 620-24; 1960 in Mowrey, Daniel, Ph.D., The Scientific Validation of Herbal Medicine, Keats, New Canaan, CT., pgs, 225-227; 1986 ...
The following table presents phytochemical groups and common sources, arranged by family:
Family Sources Possible Benefits
flavonoids
berries, herbs, vegetables, wine, grapes, tea ...
Most bottled and canned grape juices carry a low pesticide risk, according to tests conducted by Consumers Union. Purple grape juice also provides some of the same heart-protecting flavonoids found in red wine.
One note: there is some disagreement over whether or not you should remove the white pith. While it has a bitter taste it does contain healthy bio-flavonoids.
 See also: Vegetable, Fruit, Chine, Oil, Cooking
  
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