A simple question can you just stop taking Metformin or should you reduce it slowly. A friend of mine, no its not me, has recently been diagnosed Type 2, (219 mg/dl 12.2 mmol/L) and was stuck straight onto Metfornin with very little guidance. He has been taking it for the last 4 weeks, but in that time has been doing some research and decided to following Micheal Mosley's 'The 8 week Blood Sugar Diet' with great results. So he would like to stop the Metformin and control his diabetes through Diet and exercise. Any help or advice gratefully received. I have now but him onto this forum.