I have just started taking metformin 500mg three times daily for weight loss. I had talked to my doctor about not being able to loose weight for three years. I'm up to 216 after having three babies in a row and cannot loose it even with regular exercise and regular eating habits. She stated that she had used this medicine with some of her patients with 60% loosing weight. We did blood work and I am completely healthy. Did this actually work for you and how long have you stayed on the pills.