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A Harvard obesity physician says she never tells patients to eat fewer calories. She tells them something different instead

What the word "shouldn't" is doing in a sentence about food.

A woman sitting at a table looking contemplatively at her food, reflecting on her food choices
Living Article

What the word "shouldn't" is doing in a sentence about food.

The pastry case at my Sunday brunch spot has a kind of theatre to it. Croissants stacked like a fan. Almond financiers in pleated paper. A round of olive oil cake under glass, the top crackled and uneven. I look at it longer than I need to. The cake, specifically. And then a quiet voice in my head, mild as a comment about the weather, says: I shouldn't.

The voice doesn't have a reason. It just arrives. So promptly, so smoothly, that for years I never thought to look at it. I'd assumed it was the voice of self-knowledge. The voice of the part of me that wants to be healthy. The voice of an adult making adult choices.

What I've started to notice is the word itself.

Shouldn't is a moral verb. It belongs to ethics class. It's the verb we use about lying and unkind thoughts and breaking small promises, not the verb we use about being hungry or full or warm or tired. You don't think "I shouldn't" about needing a glass of water. You think it about wrong.

Somewhere along the way, eating became something I might be wrong about.

What the physician refused to say

Last week I read a piece of writing in which Fatima Cody Stanford, an obesity medicine physician-scientist at Massachusetts General Hospital and Harvard Medical School, said she never tells her patients to eat fewer calories. She tells them to focus on quality instead.

The reframing has solid science under it. The body regulates intake by volume rather than by calories. People feel full from how much food sits on the plate, not from the energy in it. A half-empty plate, at identical caloric content, leaves you hungrier than a full one.

Highly processed foods deliver hundreds of calories before your stomach has time to send a signal. Tell someone to eat less of a calorie-dense food and you have set them up to be physically hungry while feeling virtuous about it.

What stayed with me from the piece was the refusal itself. Even the physician is pulling away from the moral language. The patient is sitting across from her with a body the medical system has been telling them to police, and she is opting out of being one more voice telling them they should be eating less of something.

A moral frame in scientific clothing

Calorie counting in its modern form is barely a century old. The diet industry that grew up around it is younger than commercial aviation.

Restriction of food for moral reasons is at least as old as recorded religion. Fasting before Easter. Yom Kippur. Ramadan. The medieval saints who starved themselves toward sanctity. Long before calorie counting was prescribed by clinicians, restriction was prescribed by clerics.

When calorie counting arrived, it didn't displace the older frame. It dressed it in numbers. The arithmetic looked scientific. The verb underneath stayed the same verb a confessor used to use.

Barbara Rolls, a nutrition researcher whose work on energy density underlies much of the new approach, has found that when meals are reduced by thirty percent in calorie density but kept identical in volume, people eat thirty percent fewer calories without noticing. They don't feel deprived. They don't compensate later. They just ate, and they're full, and they don't feel virtuous about it because virtue wasn't part of the equation.

That last finding is what the diet industry can't metabolise. If the way to eat fewer calories is to eat more food, then the entire culture of restraint is solving a problem nobody actually has. The body has always been asking for fibre and water and time.

The small private courtroom

The version of this I notice most clearly in myself is the smallness of the satisfactions. Saying "I shouldn't" and then not buying the cake produces a tiny private pleasure that has nothing to do with food. It is the pleasure of having held a line. Of being someone who could have wanted the thing and chose, instead, to want to not want it.

I'm suspicious of any pleasure that requires me to have denied something first.

There is a similar moral weight smuggled into how people order at restaurants. You can hear it at brunch tables. Someone orders a salad with a tone that is doing extra work. Someone else orders the pancakes with an apologetic shrug. The whole conversation has a shape it gets into.

The vocabulary betrays the frame. Listen for it next time:

  • Foods labeled "clean" or "dirty," "good" or "bad"
  • A meal you enjoyed described as something you "cheated" with or "got away with"
  • A piece of cake called a "treat" you have to "earn"
  • Restriction described as "willpower"; ordinary appetite described as "temptation"
  • A day of eating like a normal person logged as a "bad day"
  • A day of eating less than your body wanted logged as a "good day"

Every one of those words belongs to ethics class. None of them belongs in physiology.

Hearing the word, every time

Knowing this doesn't make the voice stop. I read the Stanford piece. I understood it. I sat with the implications.

Then I went to the cafe the next morning and watched a piece of olive oil cake call out to me from behind glass and heard, on cue, the small clean voice: I shouldn't.

The moral frame is older than my knowledge. It was placed there before I had words for it. It will probably be there for the rest of my life, the way some people raised in religious households describe still hearing old reflexes in the back of their thoughts long after they have stopped believing.

The work, maybe, is just noticing. Not fighting the voice. Not arguing with it. Hearing the word "shouldn't" and registering, every time, that it is a moral verb in a place where a moral verb does not belong.

Stanford could have phrased her refusal a hundred ways. She could have said the old advice is ineffective, or outdated, or counterproductive. What she said was that she will never tell her patients to eat less.

The "never" is doing real work. It is a refusal to participate in the framing at all.

What I keep coming back to is what it would mean to refuse the framing entirely. To look at a pastry and feel only hungry or not hungry, with no virtue at stake. To order the salad because I want vegetables, or the pancakes because I'm starving, and to not narrate any of it as a small private courtroom.

I'm not there yet. I'm not sure I'll get there. But I noticed the word, this morning, when it arrived. For now that feels like enough.

Chris Jeremia

Yoga instructor · Former national triathlete

Chris is a writer, yoga instructor, and former national triathlete exploring what it means to live consciously beyond the mat and the finish line. She writes about her experience navigating the complexities of modern life with a focus on presence and connection—to nature, to others, and to self. When she’s not writing, she’s climbing, experimenting in the kitchen, or befriending every dog she meets.

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