Gout is caused by excess uric acid in the blood. It's a joint disease that causes extreme pain and swelling.
Cases of gout, which is most common in men, have doubled in the U.S. during the past few decades.
This study, published in the British Medical Journal online, also found that fruit juice and fructose-rich fruits, such as apples and oranges, were associated with increased gout risk. But they say this higher risk of gout needs to be balanced against the many health benefits of fresh fruits and vegetables.