At the (low) risk of hijacking this thread I'm wondering why the strong feelings about metformin. Along with the diet and lifestyle changes recommended by
RH Clark I would have suggested natural and proven glucose lowering substances like Cinnamon Bark, Berberine or Turmeric. In fact, I can't say for certain that metformin is not derived in part or in whole from some natural plant based ingredient and they are very effective and have few side effects.