Metformin is a medicine that we doctors prescribe to help control blood sugar in diabetic patients Sometimes on pre-diabetic patients Metformin acts on AMPK, an enzyme that tells your cells when they should take in sugar from your bloodstream for energy. Research has shown that metformin extends the lives of mice and other animals in a laboratory setting, so people without diabetes have been taking it for longevity purposes. People have also used metformin for off-label purposes like treating PCOS, to reduce risk of heart disease, and to prevent cancer.

Here's Why It May Not Be The Miracle Pill You Think It Is : When I was in my 30s, I found myself at a table with a biotech group that was doing anti-aging research with a diabetes drug called metformin. When I told them that I had been taking metformin, they looked at each other, leaned in, and asked me,?How old are you?? I told them I…