Radishes are very filling, which mean that they satisfy your hunger without running up your calorie count. They are also low in digestible carbohydrates, high in roughage and contain a lot of water, making radishes a very good dietary option for those who are determined to lose weight. Furthermore, they are high in fiber and low on the glycemic index, which means that they increase regular bowel movements, which helps in weight loss, and increases the efficiency of the metabolism for all bodily processes.