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Many other foods and beverages may also contain proanthocyanidins, but few attain the levels found in red grape seeds and skins, [6] with a notable exception being aronia, which has the highest recorded level of proanthocyanidins among fruits assessed to date (664 milligrams per 100 g).
Flavonoids, found in citrus fruits, green tea, berries, apples, onions, and cocoa, are known to reduce blood pressure and cholesterol, making them beneficial to the heart and overall health ...
Cranberries contain polyphenols, a class of plant compounds that have antimicrobial and antioxidant properties. They owe their bright red color to flavonoids , which also have antioxidant properties.
The main source of polyphenols is dietary, since they are found in a wide array of phytochemical-bearing foods.For example, honey; most legumes; fruits such as apples, blackberries, blueberries, cantaloupe, pomegranate, cherries, cranberries, grapes, pears, plums, raspberries, aronia berries, and strawberries (berries in general have high polyphenol content [5]) and vegetables such as broccoli ...
Natural phenols are a class of molecules found in abundance in plants. Many common foods contain rich sources of polyphenols which have antioxidant properties only in test tube studies. As interpreted by the Linus Pauling Institute, dietary polyphenols have little or no direct antioxidant food value following digestion. [7]
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Foods with a high flavonoid content include parsley, onions, blueberries and strawberries, black tea, bananas, and citrus fruits. [11] One study found high flavonoid content in buckwheat. [12] Citrus flavonoids include hesperidin (a glycoside of the flavanone hesperetin), quercitrin, rutin (two glycosides of quercetin, and the flavone tangeritin.
In the early part of the 20th century, White offered pineland residents cash for wild blueberry plants with unusually large fruit. [14] After 1910 Coville began to work on blueberry, and was the first to discover the importance of soil acidity (blueberries need highly acidic soil), that blueberries do not self-pollinate, and the effects of cold ...