Doctor Approved

Doctor Approved

Insights Series

Part 2: What the Body Does Instead

Why the math of aging stops working... and what to do about it.

Ben Caplan, MD's avatar
Ben Caplan, MD
Apr 19, 2026
∙ Paid

This shows up in clinic often enough that it has become familiar.

A patient sits across from me trying to describe a shift they can feel but cannot quite explain. Nothing is acutely wrong. Nothing has failed. But something no longer works the way it used to.

Not long ago, a patient I’ll call David came in for a consultation. He is fifty, a dedicated runner, and someone who has always paid close attention to how his body responds.

“I figured it out last year,” he told me. “If I cut out alcohol, sleep by 10 PM, and stay consistent, I feel great.”

Then he paused.

“But last month, I did the exact same thing. Same routine. And my knee flared up, my energy dropped, and the scale started moving in the wrong direction anyway. I don’t understand it.”

In medicine, our first instinct is to look for what is broken. That framework works when a function is lost. It breaks down when everything is still functioning.

Your body continues to regulate. You can still do what you need to do. You can still push, s…

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