Metformin

Metformin

Metformin is a drug that's been used for decades to help people with type 2 diabetes control their blood sugar, and it's become the go-to medication worldwide because it works reliably and safely. But here's what's gotten people excited recently: diabetic patients taking metformin actually live longer than people without diabetes, which suggests it might do something deeper than just managing blood sugar—it might actually slow aging itself.

Here's how it works inside your body. Metformin essentially tells your cells they're starving, even when they're not. It does this by gently slowing down the power plants inside your cells—these little structures called mitochondria that produce energy. When energy becomes scarce, your cells flip a switch called AMPK, which is basically your body's survival sensor. This switch activates a cleanup process called autophagy, where your cells get rid of damaged parts and refresh themselves, kind of like a reset button. At the same time, it makes your body more sensitive to insulin so your cells can actually use the sugar in your bloodstream instead of letting it pile up. The drug also reduces inflammation, tampers down a growth signal that might drive aging, and even shifts your gut bacteria in helpful ways. Essentially, metformin tricks your body into acting like it's in a mild caloric restriction—one of the few things science has shown can extend lifespan.