Some researchers therefore believe that anthocyanins are doing several jobs at the same time.
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Not everybody agrees that the main autumnal role of anthocyanins is protection from excess illumination.
Anthocyanins are plant pigments which colour red, purple and blue fruits and flowers.
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Researcher Dr Richard Bogle said the fruit contained polyphenolics, tannins and anthocyanins - all compounds that could have a beneficial effect.
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The authors also note that cherries and cherry extract contain high levels of anthocyanins, which can have potent anti inflammatory properties.
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Anthocyanins, Dr Hoch argues, provide a natural sunscreen for a plant's leaves.
His team found support for this theory in work showing that autumnal anthocyanins were most abundant in leaves exposed to direct sunlight, and least so in those shaded by the canopy.
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