Weight gain is linked to diabetes because it can be a risk factor for type 2 diabetes, states the American Diabetes Association. Another link between weight gain and diabetes is that weight gain can be a side effect of insulin therapy, notes Mayo Clinic.
In many cases, patients diagnosed with type 2 diabetes may be either overweight or obese. Type 2 diabetes is a condition in which the body cannot utilize the hormone insulin correctly, causing an increase in blood glucose levels. Patients with type 2 diabetes may also need to take oral medications to keep blood glucose levels in check.
There are many other risk factors, such as age and genetics, states the American Diabetes Association. For example, a thin person can be diabetic, while someone with extra weight may not have the condition.
Some patients need insulin therapy when there is a reduction of glucose in blood levels. This increases the amount of glucose in the body. If the patient consumes too many calories, the extra glucose the body does not need gets converted into fat, which leads to weight gain, notes Mayo Clinic. However, weight gain can be avoided if patients exercise regularly and watch their caloric intake.