Low-carb diets may also offer benefits to people with diabetes by preventing large fluctuations in blood sugar and perhaps increasing sensitivity to insulin. (Insulin resistance is a central problem associated with Type II diabetes, the most common form of this disease.) William Yancy, a professor of medicine at Duke, said in a recent interview that in the early 1900s, low-carb diets were often recommended for people with diabetes; they are recommended today as well, as these diets "drastically reduce the amount of medicines needed to control" blood sugar—though he added that physician supervision was important to prevent hypoglycemia.