Studying 8,128 men over a 15-year period, men who drank just a soda a day or other drinks with added sugar saw a 40% increase in the risk of developing prostate cancer. Other non-liquid sugars were implicated as well, but surprisingly, at less of an increased risk.
The study isn’t proof that white rice causes diabetes, more so, it shows the importance of eating whole grains. More brown rice is helpful because it is higher in fiber and that may protect against diabetes. Whole grains have so much more fiber, vitamins, minerals, and protein, so you get a lot more nutritional bang for your buck than with refined carbohydrates like white rice or white bread.