Metformin against cancer

Evidence from two new studies from the Perelman School of Medicine at the University of Pennsylvania suggest that metformin improves survival for some breast cancer patients. 

Results of the study showed that patients who used metformin before being diagnosed with breast cancer were more than twice as likely to die than patients who never used the drug, while patients who began using metformin after their cancer diagnosis were almost 50 percent more likely to survive than non-users.