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Red onions, broccoli and grapes: quercetin source

Red onions, broccoli and grapes: quercetin source

H110/0866

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40.0 MB (2.8 MB compressed)

3334 x 4194 pixels

28.2 x 35.6 cm ⏐ 11.1 x 14.0 in (300dpi)

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SHEILA TERRY / SCIENCE PHOTO LIBRARY SHEILA TERRY / SCIENCE PHOTO LIBRARY

Caption

Foods rich in quercetin. Red onions, red grapes and broccoli, vegetables and fruit known to be an important source of quercetin. Quercetin is a flavonoid with antioxidant properties, and is believed to be a powerful anticancer agent. Up to 10% of a red onion's dry weight is made up of quercetin, with the next highest source being red grapes, then broccoli. White onions contain little or no quercetin. This substance also protects arteries, discourages blood clots, kills bacteria, inhibits viruses, and is an anti-inflammatory and anti-allergenic agent. These fruit and vegetables are also rich in vitamins and minerals.

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