Keto Start ACV Gummies - “We see pretty dramatic benefits,” said Dr. William Yancy, director of the Duke Diet and Fitness Center. Insulin is a hormone that lets your body use or store sugar as fuel. Ketogenic diets make you burn through this fuel quickly, so you don’t need to store it. This means your body needs -- and makes -- less insulin. Those lower levels may help protect you against some kinds of cancer or even slow the growth of cancer cells.