My feeling is that diabetes is, at least in part, caused by poor circulation. The peripheral neuropathy commonly associated with diabetes may actually be cause

My feeling is that diabetes is, at least in part, caused by poor circulation. The peripheral neuropathy commonly associated with diabetes may actually be caused by poor circulation as well, not by diabetes. If blood flow to your limbs is impaired, your limbs can't process insulin very well. Given this view, anything that promotes circulation is going to help diabetes.