Electrons and Why We Eat

Somewhere along the way, most of us stopped asking why we eat.

Not because we're careless, and not because we don't think about food. We think about it constantly. We count it, we plan it, we worry about it, we reach for it when we're happy and when we're not. But underneath all of that, the simplest and most important question quietly disappeared. What is food actually for? Most of us were never really taught. We learned about calories and food groups, grams of protein, maybe even amino acids, and we came away believing that eating is mostly about energy in and energy out, or about willpower, or about pleasure. All of that misses the real story, and the real story is so much more powerful.

So I want to give you a new lens, one that changes how you'll look at every meal for the rest of your life. Here it is: food is information. Food is a signal. And at the deepest level, food is a source of electrons that your body uses to make energy and to run every single process that keeps you alive.

Let me show you what I mean, because once you see it, you can't unsee it.

We don't really run on calories

A calorie is just a unit of heat. It tells you how much energy is locked inside a food if you were to burn it. It's a useful number, but it's a bit like describing a book by its page count. The number tells you nothing about the story inside, whether it will move you, teach you, or stay with you for years. It completely misses what's actually happening.

What your body is really doing when you eat is far more elegant. It's taking food apart to get at the tiny charged particles inside it, and using those particles to power tiny molecular machines called mitochondria. You have trillions of them. They live inside your cells, sometimes thousands packed into a single hard-working heart or muscle cell, and they're running inside you right now, as you read this.

Food is electrons

When you eat, your body breaks food down into simpler fuel molecules. Carbohydrates become glucose. Fats become fatty acids. Protein becomes amino acids. So far this is the part most people know.

Here's the part almost no one is told. Your cells then strip those fuel molecules apart, and what they're really after are the high-energy electrons held inside them. Food, at its heart, is a carrier of electrons. That's what all the digesting and processing is ultimately for. Your body is harvesting charge.

Those electrons don't just float around loose. They get loaded onto special carrier molecules that act like tiny shuttle buses. These carriers have names, and they're worth knowing, because you'll meet them again. They're called NAD and FAD. Here's a detail I love: FAD is built from vitamin B2, and NAD from vitamin B3. Keep that in the back of your mind, because it's going to matter enormously when we get to why certain foods are so important. The vitamins in your food aren't just nice to have. Some of them literally become the machinery that moves your electrons.

The loaded shuttles carry their electrons to the place where the magic happens. Your mitochondria.

The motor inside every cell

You've probably heard mitochondria called the powerhouse of the cell. That's true, but it's such a flat little phrase for something this wondrous. Let me tell you what's really going on in there.

Along the inner membrane of each mitochondrion sits a series of structures called the electron transport chain. Each of those structures is called a complex. When the shuttle buses arrive, they hand off their electrons, and those electrons begin to flow through the chain, moving from one complex to the next. As they flow, the energy they release is used to do something remarkable. It pumps protons, which are simply hydrogen ions, across the membrane, piling them up on one side.

Think about what that creates. You now have a crowd of positively charged particles gathered on one side of a barrier, all of them wanting to rush back across. That's a gradient. It's a kind of battery, an electrochemical charge your cell has built out of the food you ate. Your own inner power source, assembled meal by meal.

And here is the most beautiful part of the whole story.

Those crowded protons are allowed to rush back across the membrane through one specific gate. That gate is a very special enzyme called ATP synthase. It's special because it doesn't just sit still and drive a chemical reaction the way most enzymes do. It physically spins, quite literally a tiny motor, the way water pouring over a wheel turns the wheel. As the protons pour through it, they make it turn, and every time it turns, it manufactures ATP, the molecule your body uses as its energy currency for absolutely everything. Moving a muscle, firing a thought, healing a wound, beating your heart. It all runs on ATP, and ATP is made by a turbine spun by a waterfall of protons that came from your breakfast.

I find that almost impossible to think about without a sense of awe. You are, at this very moment, a collection of trillions of tiny proton-powered engines, and you keep them running by what you put on your plate.

And this is why you breathe

There's one last piece, and it ties the whole thing together. At the very end of the electron transport chain, those spent electrons need somewhere to go. The molecule that accepts them is oxygen. Oxygen grabs the electrons, joins with the protons, and becomes water.

That's why you breathe. Every breath you take is delivering the final piece of this system, the oxygen that keeps your electrons flowing and your motors turning. Food gives you the electrons. Breath gives you the acceptor at the end of the line. Together they keep you alive, second by second, without a single conscious thought from you.

So this is why food matters

Now you can see why I keep saying we've forgotten what food is for. It was never really about calories, and it was never only about pleasure, though pleasure is a lovely part of a good meal. Food is the raw material and the electrons and the signals your cells use to run the most sophisticated machinery in the known universe.

And this is the reframe I hope you'll carry with you into how you choose to eat. Because if food is the fuel and the building material for this system, then the quality of the food becomes the quality of the machine. Foods that are rich in the nutrients your mitochondria actually need will help this whole process hum. Foods that are empty, or that clog and stress the system, will leave your engines struggling and leaking.

That's where we're going next. In the coming posts I want to show you which foods carry the most of what this machinery needs, and why some of the most nourishing foods on earth are the ones our modern plates have quietly left behind. You'll start to see beef, and liver, and the humble nutrients almost no one talks about, in a completely new light, as the raw materials for the motor inside you.

For now, I just want you to sit with the wonder of it. The next time you eat, remember what you're really doing. You're not just filling up. You're feeding trillions of tiny engines the electrons they need to keep you alive. That is why we eat.