metformin

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!

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

https://www.ncbi.nlm.nih.gov/pubmed/15771611
http://www.worldhealth.net/news/metformin-may-promote-anti-aging/
http://www.cell.com/cell-metabolism/pdf/S1550-4131(16)30229-7.pdf