It is possible to eat sugar and lose weight, according to Japanese researchers, just as long as that sugar contains dietary fibres. A research group from the Kagoshima University overturned the traditional assumption that sugar causes weight gain after experimenting with the dietary habits of mice and rats. Professor Makoto Fujii, from the university's school of agriculture, and assistant Professor Hou Dexing found that the animals lost weight when they ate sugar combined with arabinose, a sugar found in dietary fibre.