It wasn't working, as my a1c showed. I have tried all the pills and failed with them,, and resorted to the insulin. Then it didn't work either. No, diet and exercise were not helping. I was eating keto, with no starch, white flours, sugar, etc. Nothing but lean meat, non starchy vegetables, and water. I also went to the gym and worked out WITH A TRAINER, for a minimum of 1.5 hours a day. Along with my normal walking.