It is not appropriate for diabetics to be obese nor thin, and it is best to maintain a reasonable weight. Obesity is a high risk factor for diabetes, and the prevalence of diabetes in overweight people increases significantly, so it is not appropriate for diabetics to be obese. Because studies have found that obesity leads to increased insulin resistance in the body, and if you lose weight effectively, you can reduce insulin resistance and help control blood sugar. However, one of the symptoms of diabetes is a significant loss of weight in a short period of time, so it is not better for diabetics to be thinner. This is because a thin body means more protein loss in the body, which can lead to a decrease in the body’s immunity. Therefore, people with diabetes need to maintain a healthy weight. Generally speaking, overweight/obese patients should lose 5%~10% of their body weight within 3~6 months; and for those who are thin, they should achieve and maintain their ideal body weight for a long time through a reasonable nutrition program, and the standard of ideal body weight is to maintain the BMI value between 18.5 and 23.9. The so-called BMI value refers to the data obtained by dividing the weight (in kg) by the square of the height (in m). It is not appropriate for diabetic patients to be obese or emaciated, and they need to lose weight or gain muscle under the guidance of their doctors in order to maintain good health.