Keeping the years off your face may soon become a lot easier as researchers have now discovered new evidence that anti-diabetic drug metformin slows aging and increases lifespan. Turning on its head what scientists earlier thought caused aging the researchers found that the drug causes an increase in the number of toxic oxygen molecules released in the cell and this surprisingly increases cell robustness and longevity in the long term. 'Metformin causes a slight increase in the number of harmful oxygen molecules. We found that this makes cells stronger and extends their healthy lifespan' said Wouter De Haes from University