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Metformin has been proposed as an “anti-aging drug,” and scientists are organizing TAME, a major clinical trial to test the idea. In Part 2 of this 5-part series, we look at some of the human studies on metformin, including a flawed observational study that created the illusion that diabetics on metformin actually live longer than people without diabetes.

Metformin has been proposed as an “anti-aging drug,” and scientists are organizing TAME, a major clinical trial to test the idea. In Part 1 of this 5-part series, we look at the animal studies underlying this idea.