Journal Club with Dr. Peter Attia | Metformin for Longevity & The Power of Belief Effects

Mechanism

Andrew Huberman and Dr. Peter Attia explore how metformin interacts with mitochondrial function and blood glucose levels. Peter explains that metformin works by weakly inhibiting the electron transport chain, altering the ratio of adenosine monophosphate to adenosine diphosphate, which reduces hepatic glucose output. This mechanism is crucial for managing type 2 diabetes, as it helps regulate the liver's glucose production 1.

Metformin works at the first of those complexes, I believe there are four, if my memory serves correctly, four electron transport chain complexes. But of course, it's not a complete inhibition of it, it's just kind of a weak blocker of that.

--- Dr. Peter Attia

Andrew simplifies this by explaining that metformin partially short-circuits the energy production process, leading to less net glucose in the bloodstream 2.

   

Clinical Studies

The discussion shifts to key clinical studies investigating metformin's impact on mortality and longevity. Peter highlights a Kaplan-Meier curve from one study, explaining how it shows the cumulative survival rate over time for those on metformin versus controls 3. The data reveals that people with type 2 diabetes on metformin have a 15% relative reduction in all-cause mortality over 2.8 years.

The people who took metformin and had diabetes had a 15% relative reduction in all-cause death over 2.8 years, which was the median duration of follow-up.

--- Dr. Peter Attia

Andrew and Peter emphasize the importance of understanding such data to make informed decisions about metformin's potential benefits 4.

   

Health Benefits

Peter elaborates on the general health benefits of metformin, including its protective roles and mechanisms in non-diabetics. He shares his personal experience with metformin, noting its origins from a lilac plant in France and its ability to reduce blood glucose and inhibit mTOR 5. Despite its benefits, Peter advises caution, especially for those without diabetes.

My intuition is that the metformin is helping, but not helping nearly as much as we thought before.

--- Dr. Peter Attia

Andrew adds that metformin's impact on reducing inflammation and senescent cells could offer additional health benefits, making it a topic of ongoing research 6.