Rapamycin has become one of the most talked-about drugs in longevity circles. Depending on who is speaking, it is either the most promising geroprotector we have or a risky transplant drug being dragged too quickly into wellness culture. A 2026 randomized trial called RAPA-EX-01 gives the conversation something it badly needed: a real human result that was not especially flattering. In sedentary adults aged 65 to 85, weekly sirolimus, which is the medical name for rapamycin, did not improve the benefits of a 13-week exercise program. In some analyses, it may have slightly reduced gains in chair-stand performance, and the Sirolimus group had more adverse events

The switch is mTORC1 on one side, AMPK on the other, and a molecular logic that was built for a world of alternating feast and famine. In that world, the switch flipped regularly. Neither side stayed dominant for long. The modern environment broke that rhythm — and when the switch got stuck, something else happened that is more consequential than a switch simply being in the wrong position. A feedback loop formed. The stuck switch began generating the conditions that kept it stuck. And once that loop is running, the familiar tools — eating less, trying harder, starting over — can make it worse rather than better.

Part One: The Switch You have done everything right. You cut the calories, gave up the bread, the wine, the desserts that used to feel like a reasonable reward for getting through the week. For a while it worked. Then it stopped

Now, I consider myself to be a pretty health-conscious person. For the last 30+ years, part of my daily routine has been working out at the gym, picking up new things every so often.

It’s important to never stop learning, mix up your workouts and keep things fresh.

So, I was surprised that it wasn’...

By Jackie Kolgraf

Edited and approved by Stephen C. Rose, Ph.D.

Women can preserve muscle, support bone health, improve physical function, and lower long-term disease risk through strength training. That sentence would have sounded niche not long ago. It now reads more like standard exercise...

By Jackie Kolgraf

Edited and approved by Stephen C. Rose, Ph.D.

September 25, 2025

There is a moment plenty of men know, upon its arrival, you’re carrying groceries, wrestling a suitcase into an overhead bin, or getting up from the floor after fixing something under the sink, and your body responds...

By Donna Wright

Edited and approved by Stephen C. Rose, Ph.D.

Why Walking Keeps Showing Up in Longevity Research

Walking is a consistently useful form of physical activity in longevity research. It’s accessible, sustainable, and solidly linked to a lower risk of early death. A 2025 life-table...