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More than 100 years after it was first synthesized, and after decades of medical use, metformin's true potential might yet to be tapped. (Guido Mieth/Moment/Getty Images) A common drug that's been used to treat patients since the 1950s may hold transformative potential for human health, researchers say. In a new review, scientists go as far as calling it a potential "wonder drug" but say more research is needed to understand how it can benefit modern medicine – especially with regard to its promise for slowing down biological aging .

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