The modern white rice is high in glucose and low in micronutrients.
You can expect poor blood glucose control if you have diabetes and too much too regularly could make you prone to developing type 2 diabetes.
http://www.straitstimes.com/singapore/health/diabetes-the-rice-you-eat-is-worse-than-sugary-drinks
https://www.facebook.com/belindanofructose/posts/1120648348029615