I Sarah, I've been on Metformin for a few months now. Obviously it can only help when you eat well & I have my good & bad days. Since starting Metformin I went from 16st 6lb to 17st. I'm a week into WW & I've lost 5.5lb. Sadly I don't think Metformin has helped me but obviously it's more for Diabetes. I'm actually seeing my nurse Friday for a review so if she tells me any interesting info I'll fill you in!