In fact, the complications of diabetes are not preventable. Of course, it's best to eat 8 minutes full every meal, eat more vegetables and eat less fatty things. It is best not to eat animal offal, because its high cholesterol content is not good for diabetics, and diet is the most important. I read a magazine that diabetic patients can reduce 50% of complications if they eat more vegetables and exercise for more than an hour every day, so exercise is also necessary. I hope it helps you.