"Powerhouse of the cell." We all learned it in school. Here's a fun fact: the phrase was coined by Scientific American back in 1957.
And here's the news: according to Dr. Martin Picard, a mitochondrial biologist at Columbia University, "the powerhouse analogy is expired. So it's time for a new perspective."
I love this, because it captures exactly how my own understanding has changed. Mitochondria aren't just tiny batteries. They're far stranger and more interesting than that.
First, a correction Picard insists on: mitochondria don't make energy. Energy can't be created — that's basic physics. What mitochondria do is transform it. They take the food you eat and the oxygen you breathe, converge them inside the cell, and convert them into an electrical charge — a membrane potential. They "dematerialize" food into a flexible form of energy the body can actually use. Then they become charged, like little batteries, powering everything from switching genes on to building proteins to cell division.
But the surprises kept coming, and this is where Picard says he became what he calls a "mitochondriac." A powerhouse should have one job. Mitochondria, it turns out, make hormones. They turn genes on and off. They can order a cell to die when they decide it's the right call. They have a life cycle — they're born, they divide, they get recycled.
And then came the discovery that changed his career: looking through an electron microscope, Picard saw the internal folds of one mitochondrion — the cristae — bending out of shape to align with the cristae of a neighboring mitochondrion. The first physical evidence that mitochondria share information with each other. As he puts it, "the mitochondria care about mitochondria around them."
He now describes them as acting "like a mini brain inside every cell" — integrating dozens of signals about hormones, energy levels, and temperature, and making decisions as a collective. Health, in this view, is coherence: every cell in a social contract with every other cell. When cells break that contract and go rogue, that's what we call cancer.
Even exercise looks different through this lens. When you push your body hard, every cell has to come together and communicate to survive the challenge — and afterward, the body builds more mitochondria to be ready next time. You can roughly double the mitochondria in your muscles going from sedentary to trained.
I share all this because it's the science underneath my own story. I started out looking for energy. I ended up finding a whole new way of seeing the body — not as a machine with parts, but as a conversation. And I think that conversation is worth listening to.
Next read: How to Build "Superager" Mitochondria — how they renew themselves.
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