Date Time Gained weight after losing it? This could be culprit Consuming foods like soft white bread and jasmine rice lead to greater weight gain after weight loss, new research suggests. Such foods can also raise blood glucose levels, increasing the likelihood of type 2 diabetes. Kate and Ben Obermeyer lost weight after following a low-GI diet. Credit: Kate Obermeyer High glycemic index (GI) versions of foods like bread, potato and rice (for example, soft white and brown breads, desiree potatoes and jasmine rice) are likely to significantly increase the risk of weight gain following weight loss, new research suggests. Participants in an international study who maintained a high GI diet following weight loss gained half a kilo more per year than those with a low GI diet.