The compounds which give certain fruit and vegetables their dark colour may contain powerful cancer fighting properties.

Studies on rats and human cells found [anthocyanins](http://www.answers.com/anthocyanin “Answers.com”) – which color red, purple and blue fruits – notably slowed the growth of colon cancer cells.

[Read](http://news.bbc.co.uk/2/hi/health/6954696.stm “Read the Story”) (BBC)