If you have not tried to lose weight and there is nothing in your life that can cause you to lose weight temporarily, then maybe you can have an underlying health condition that can be serious and that seriously affects your health. Therefore, it will be necessary that you go to your doctor and take weight loss supplements as soon as possible. Diabetes can affect anyone at any age, although older people usually have diabetes. There are times when diabetes can cause weight loss inexplicably, especially in cases where diabetes is not being treated. The person may feel as if he is more nervous, start to lose weight, as if he is always hungry, urinate frequently, have blurred vision and have frequent infections.