A hungry brain makes poor decisions
Cada semana, millones de personas entran a un supermercado con buenas intenciones y salen con un carrito que no refleja lo que querían. El nutricionista Pablo Ojeda observa este patrón con la mirada de quien entiende que el entorno moldea las decisiones antes de que la razón tenga oportunidad de intervenir. Sus cinco consejos no son reglas de disciplina, sino herramientas para recuperar la agencia dentro de un espacio diseñado para cederla.
- El hambre no es solo una sensación física: cuando entramos al supermercado sin haber comido, el cerebro prioriza el impulso sobre la intención, y la lista escrita se convierte en papel mojado.
- Los supermercados están arquitectónicamente diseñados para que los productos ultraprocesados intercepten el camino antes de que lleguemos a los alimentos reales.
- Las etiquetas mienten por omisión: el azúcar se disfraza bajo docenas de nombres técnicos, y solo quien sabe leerlos puede esquivar la trampa.
- Contar calorías es una distracción: cien calorías de una sardina y cien calorías de una galleta no hacen lo mismo dentro del cuerpo.
- El huevo emerge como símbolo de lo posible: nutritivo, accesible y versátil, demuestra que comer bien no requiere ni grandes presupuestos ni grandes sacrificios.
Entras al supermercado con una lista. O eso crees. Al llegar a la caja, el carrito contiene cosas que no planeabas comprar. Según el nutricionista Pablo Ojeda, el motivo suele ser uno: llegaste con hambre.
Ojeda explica que un cerebro hambriento toma malas decisiones. No es una cuestión de fuerza de voluntad, sino de neurología: cuando el cuerpo señala necesidad, el impulso desplaza al razonamiento. De ahí que su primer consejo sea tan sencillo como eficaz: lleva una lista escrita y come antes de ir.
El segundo consejo es espacial. Los supermercados están diseñados con una lógica clara: en el perímetro viven los alimentos frescos —fruta, verdura, carne, pescado—, mientras que los pasillos centrales concentran los productos ultraprocesados, formulados para resultar irresistibles. Ojeda recomienda recorrer los bordes y atravesar el centro con propósito, no con curiosidad.
Cuando algo llama tu atención, lee la etiqueta. El marketing promete; los ingredientes informan. Ojeda advierte sobre los azúcares ocultos que aparecen bajo nombres como jarabe de maíz, glucosa o fructosa. Cuantos menos ingredientes tenga un producto, mejor.
Aquí Ojeda abandona la lógica calórica. Cien calorías de una galleta y cien calorías de una sardina no son equivalentes: la sardina aporta proteína, grasa saludable y micronutrientes; la galleta, energía y poco más. Lo que importa no es cuánta energía contiene un alimento, sino cuánta nutrición real ofrece.
Por último, señala al huevo como alimento fundamental: barato, proteico, rico en grasas saludables y micronutrientes, presente en todas las cocinas del mundo porque simplemente funciona. Para Ojeda, estos cinco gestos no son trucos menores. Son la diferencia entre un carrito que alimenta y uno que solo llena.
You walk into the supermarket with a list. Or you think you do. By the time you reach the checkout, your cart holds things you didn't plan to buy—cookies, flavored yogurts, snack bars that promised health but delivered mostly sugar. The culprit, according to nutritionist Pablo Ojeda, is simple: you came hungry.
Ojeda has spent enough time watching people shop to understand the mechanics of how good intentions collapse in the fluorescent aisles. The first rule he offers is almost embarrassingly straightforward: arrive with a written list and a full stomach. A hungry brain, he says, makes poor decisions. This isn't willpower talk. It's neurology. When your body is signaling need, your prefrontal cortex—the part that remembers what you actually wanted to buy—takes a back seat to impulse. The list becomes a suggestion rather than a guide.
The second move is architectural. Most supermarkets are designed the same way: the perimeter holds the real food. Fruit, vegetables, meat, fish—these live on the outer edges. The center aisles, by contrast, are where the industry has stacked its engineered products, the ones engineered to be irresistible. Sugar hides in the middle. Ojeda's advice is to shop the edges and move through the center with purpose, not curiosity.
Once you're holding something, read what it says. The label matters more than the marketing. Ojeda emphasizes ingredient count: fewer is better. But he also flags a specific trap—hidden sugars that wear different names. Corn syrup. Glucose. Fructose. These aren't accidents. They're there because they're cheap and they work. The label will tell you the story if you know how to read it.
Here's where Ojeda shifts the conversation away from calories, which he treats as a red herring. One hundred calories of a cookie and one hundred calories of a sardine are not equivalent. The sardine brings protein, healthy fat, vitamins, minerals—density of actual nutrition. The cookie brings energy and little else. This distinction matters because it changes how your body processes what you eat and how long you stay satisfied. Calories are a measure of energy. Nutrition is a measure of what your body can actually use.
Finally, he points to eggs. They're cheap. They're shelf-stable. They contain complete protein, healthy fat, and a spectrum of micronutrients. For someone trying to build a sustainable way of eating—not a diet, but an actual practice—eggs are a non-negotiable basic. They're the kind of food that appears in every cuisine because they work.
Ojeda frames all of this as simple tricks, but he's clear about what they add up to: the difference between a cart full of processed foods and one that actually nourishes. The supermarket isn't neutral space. It's designed to move you toward certain choices. Knowing this, and knowing how to move through it differently, changes what ends up on your table.
Notable Quotes
A brain with hunger makes bad decisions— Pablo Ojeda, nutritionist
One hundred calories of a cookie doesn't provide the same nutrition as one hundred calories of a sardine— Pablo Ojeda, nutritionist
The Hearth Conversation Another angle on the story
Why does hunger matter so much at the grocery store? Isn't it just about willpower?
Hunger isn't a character flaw—it's a biological state that literally changes how your brain prioritizes. When you're hungry, the part of you that makes deliberate choices gets quieter. The impulse part gets louder. A list only works if you're in a state where you can actually follow it.
So the layout of the store is intentional?
Completely. The perimeter is where the perishables live—the things that require actual preparation, actual cooking. The center aisles are where the shelf-stable, engineered products live. That's not accident. That's design.
What about people who say they don't have time to read labels?
Reading a label takes maybe ten seconds. But more importantly, once you know what to look for—ingredient count, hidden sugar names—you start recognizing patterns. You don't have to read every label every time. You learn which products are actually food and which are food-like.
You mentioned nutrient density over calories. Can you explain why that matters practically?
Because satiety is real. If you eat a hundred calories of processed carbs, your blood sugar spikes and crashes. You're hungry again in an hour. A hundred calories of protein and fat from a sardine keeps you satisfied for hours. You eat less overall, and your body gets what it actually needs.
Why eggs specifically?
They're the perfect intersection of cheap, accessible, and nutritionally complete. They're not a trend food. They're a foundation. If someone's trying to change how they eat, eggs are the kind of thing that works in any cuisine, any budget, any cooking skill level.
Does this approach require giving up everything you enjoy?
No. It's about being intentional about what you bring home. If you want cookies, you can buy cookies. But you're doing it consciously, not because hunger made the decision for you at the checkout.