Metformin is anti diabetic madicine.
It is a treatment for reducing the negative affects of diabetes.

It increase insulin sensitivity and lowers blood sugar levels.
It inhibits IGF-1 and mTOR in addition to reducing ROS. (This means it is anti aging!)

Metformin also works as an anti-inflammatory agent and it makes your cells more robust resulting in increased longevity!

And this i a big but..
You need a prescription from your doctor to get it.