They locked 20 people in a lab to settle one question about your weight.

Today’s letter

My mother tried every diet she could find: cabbage soup, the points system, those chalky shakes you drink instead of meals. The weight would come off, maybe eight pounds, and then it would come right back again. Usually by Christmas.

I watched her get dressed for a wedding once. There was a blue dress she liked and it didn’t fit. She stood at the mirror for a long time, and then she said something I’ve never forgotten.

“What’s wrong with me?”

This was a woman who raised three kids, worked two jobs, and never once called in sick. But hand her a plate of food and that was the one fight she couldn’t win.

Her doctor had an answer, of course. Eat less, move more… the same line they give everybody. So she carried the blame for years.

Here’s what gets me.

None of it was her fault.

Let me show you how I know that. Not with my opinion, but with a study.

In 2019, the National Institutes of Health ran a study almost nobody heard about. They brought twenty adults into a research ward and fed them for a month. Every meal was made in-house and every bite was weighed. Nobody was put on a diet and not one calorie got counted.

Half of them ate ultra-processed food, the bagged and boxed factory kind. The other half ate whole food: plain ingredients, nothing fancy. Both groups could eat as much as they wanted, or as little. And the two menus matched on calories, sugar, fat and fiber, so the only real difference was the food itself.

What they found

National Institutes of Health, 2019. Hall et al., Cell Metabolism.

The factory food (they gained)

They ate about 500 calories more a day, without trying and without even noticing.

The whole food (they lost)

They had the same freedom to eat as much as they wanted, but they ate less and the weight came off on its own.

The calories matched. So did the sugar, the fat, the fiber. Only the food was different.

In other words, the food itself was the cause.

Her willpower had nothing to do with it. Yours doesn’t either.

So how does a snack outsmart a woman like that?

It’s designed that way. Food companies pay scientists to find what they call the “bliss point”… the exact mix of sugar, salt and fat that keeps your hand going back for one more. The stuff is soft and it goes down fast, but your “I’m full” signal takes a good twenty minutes to reach your brain. By the time it does, you’ve already eaten far more than you ever meant to.

My mother never stood a chance. Neither did you, I’d bet.

That’s the part no one says out loud. Your hunger works fine and willpower was never the problem. You were eating food built by people whose whole job is getting you to eat more of it. Of course it worked. It works on everyone.

Try this today

You don’t need to overhaul your kitchen. Take the one factory food you reach for most: the cereal, the crackers, the flavored yogurt, the “protein” bar. Swap it for something whole, like an egg, a handful of nuts, or a piece of fruit.

One swap. That’s all.

Promise me you’ll try it today? Saying it out loud is half of what makes it stick.

I’m in. I’ll try it today →

Not because whole food is magic. It isn’t. The difference is that whole food doesn’t work against you. It lets your “full” signal do its job… the way it always could, long before any of this began.

My mother worked it out eventually. A little late, but she got there.

There’s still time for you.

And whatever the scale’s been telling you all these years…

It was never your fault.

— Cole

P.S. Out of curiosity: how many diets have you been on in your life? Hit reply with just the number. I’ll tell you how you compare tomorrow.