Making major lifestyle changes or taking metformin both work better than a placebo pill at delaying or preventing type 2 diabetes. For many people, making major lifestyle changes works better than taking metformin to help delay or prevent type 2 diabetes for up to 10 years. A follow-up study at 15 years showed that making major lifestyle changes was about equal to taking metformin in helping to delay or prevent type 2 diabetes. But doing both of these things may give you the best chance of delaying or preventing type 2 diabetes over the long term.

The information shown here is based on the best available evidence.