An epidemiological study where only association can be confirmed. While I believe there may be something to the findings, a more rigorous study with experimental and control groups would be hard to do and ethically questionable. Detailed questionnaires are notoriously inaccurate. If the only dietary source of sugars were the beverages, that might be better, but who that is participating is not consuming other foodstuffs that are also converted into glucose? I stay away from fruit and especially fruit juice and other sugar-sweetened beverages on general principle. Better safe than . . .