Organic fruit and vegetables may be better for you than conventionally grown crops, US research suggests.

A ten-year study comparing organic tomatoes with standard produce found almost double the level of flavonoids, which help reduce high blood pressure and lower the risk of heart disease and stroke.

Writing in the Journal of Agricultural and Food Chemistry, the team said nitrogen in the soil may be the key. New Scientist magazine reported that the different levels of flavonoids in tomatoes are probably due to the absence of fertilizers in organic farming.

[Read](http://news.bbc.co.uk/2/hi/health/6272634.stm “Read the Story”) (BBC)