Hyperpalatable Foods: The Math Behind Why You Can't Stop Eating

You sit down with a bag of chips, fully intending to eat a small handful. Twenty minutes later, you're staring at the bottom of the bag and wondering what just happened. The same thing keeps happening with the ice cream, the cookies, the leftover pizza. You eat past full. You eat past wanting more. You eat until the container is empty.

Your willpower isn't broken. The food is engineered.

A specific combination of fat, sugar, and salt — at specific ratios — overrides the appetite-regulation system in a way that single-ingredient foods don't. A plain baked potato is hard to overeat. A potato that's been sliced thin, fried in oil, and dusted with salt is almost impossible to stop eating. The potato didn't become more nutritious. It became hyperpalatable.

Here's the math behind why, the three macronutrient combinations that drive it, and what to do about it.

What "Hyperpalatable" Actually Means

The word "hyperpalatable" floated around the obesity research literature for years without a precise definition. Researchers and clinicians agreed that some foods seemed to drive overeating in a way that staple foods didn't, but there was no quantitative line you could draw between "regular food" and "hyperpalatable food." That ambiguity made the concept useful for talk shows and useless for science.

In 2019, Tera Fazzino, Kaitlyn Rohde, and Debra Sullivan published a paper in the journal Obesity that fixed the problem. They reviewed the existing literature on which foods drove compulsive intake, identified the macronutrient profiles that kept appearing across studies, and proposed a quantitative definition: a food is hyperpalatable if it crosses one of three specific dual-macronutrient thresholds. Then they ran the definition against the US Food and Nutrient Database for Dietary Studies and reported how much of the American food supply qualified.

The answer, roughly, was the majority of it.

The Three Combinations

The Fazzino framework identifies three combinations of macronutrients that, when present together above specific thresholds, appear to override normal satiety signals. The thresholds aren't arbitrary — they're the cutoffs that, in the underlying research, separated foods people could moderate from foods people couldn't.

Combo 1: Fat + Sodium — The "Chips and Pizza" Profile

A food meets this threshold when more than 25% of its calories come from fat and it contains at least 0.30% sodium by weight. In plain English: a salty food that's also at least a quarter fat.

This is the profile of pizza, french fries, potato chips, fried chicken, processed meats, cheese-heavy snacks, and most fast food entrees. The fat carries flavor compounds and creates the mouthfeel; the sodium sharpens the taste, drives thirst, and seems to interact with fat to enhance reward signaling beyond what either does alone. Whole-food versions of these flavors barely exist — there's no naturally occurring food that's simultaneously 25% fat by calories and 0.30% sodium by weight. The combination is almost entirely a product of food processing.

Combo 2: Fat + Sugar — The "Ice Cream and Pastry" Profile

A food meets this threshold when more than 20% of its calories come from fat and more than 20% of its calories come from sugar. In plain English: a sweet food that's also substantially fatty.

This is ice cream, donuts, frosted cakes, milk chocolate, most cookies, cheesecake, pastries, and the dessert end of the coffee-shop menu. As with the fat-plus-sodium profile, the fat-plus-sugar combination is rare in nature. Whole fruits are sweet but not fatty. Nuts and avocados are fatty but not sweet. The combo only really shows up in foods humans have intentionally constructed — and once it does, the brain's reward system seems to treat it as a special category. Brain imaging research has shown distinct activation patterns for fat-plus-sugar foods compared to either macronutrient alone.

Combo 3: Carbohydrate + Sodium — The "Pretzel and Cracker" Profile

A food meets this threshold when more than 40% of its calories come from carbohydrates and it contains at least 0.20% sodium by weight. In plain English: a starchy food that's also salty.

This is pretzels, salted crackers, many breads, savory cereals, salted popcorn, and a long list of grocery-aisle snacks that sit between the chip bag and the cookie shelf. The carb-plus-sodium combo is a quieter version of the chip profile — less fat, but the same engineered flavor pop that makes a "small handful" turn into the bottom of the box.

Why So Many Foods Qualify

When Fazzino and her co-authors applied their three thresholds to the US food system database, the result was striking. The majority of items in the database qualified as hyperpalatable under at least one of the three definitions, and a non-trivial share qualified under two. That's not a fringe category of "junk food." That's the dominant macronutrient profile of the modern grocery store.

Walk down any center aisle and look at what shows up. Frozen pizzas hit fat-plus-sodium. Boxes of mac and cheese hit fat-plus-sodium and carb-plus-sodium. Granola bars often hit fat-plus-sugar. Crackers, salted nut mixes, microwave popcorn, breakfast cereals, sauces, dressings, frozen dinners — almost all of them clear at least one threshold, and the most reliably overeaten products in each category tend to clear two.

This is not an accident. Food companies operate large research-and-development programs whose explicit purpose is to identify formulations that maximize consumption. The industry has its own term for the optimal point on the response curve — the "bliss point" — and food scientists run sensory panels to find it. The dual-macronutrient combinations identified in the Fazzino framework are, in effect, the engineering output of decades of that work. A box of cookies on the shelf isn't there because that's what cookies have to taste like. It's there because that's what cookies tested best as.

What This Means for Calorie Control

Standard appetite regulation is roughly volumetric and protein-sensitive. Eat enough physical food, eat enough protein, and the system signals enough. The satiety-per-calorie framework is built around exactly that observation: foods that are filling per calorie make a deficit nearly automatic.

Hyperpalatable foods break the system from both directions. They're calorie-dense, which means a meal's worth of calories occupies a snack's worth of physical volume, so the stretch receptors in the stomach barely fire. And they have a low protein-to-energy ratio, so the protein-leverage signal that normally caps intake never trips. On the other side of the equation, the dual-macro reward signal is louder than the satiety signal — the brain keeps wanting another bite even after the body has technically had enough. The meal ends when the bag is empty, not when you are full.

This is the mechanism behind the pattern people describe as "I just can't stop." It isn't about discipline. It's about a food category that was designed to outrun the off-switch.

What to Do About It

Cleaning up your environment is more reliable than out-disciplining the food. A few practical moves:

Learn to spot the combinations on a label. Most nutrition labels don't print sodium as a percent of weight, but the math is easy: divide milligrams of sodium by grams of serving size and multiply by 0.1. If you cross 0.30% with fat above 25% of calories, you've found a chip-profile food. If a packaged dessert is more than 20% fat by calories and more than 20% sugar by calories, you've found an ice-cream-profile food. The hyperpalatability detector does the math for you on any food you paste in — it'll flag which thresholds the food clears and how close it is on the others.

Pay extra attention to two-combo foods. Some of the most overeaten products in the grocery store clear two of the three thresholds simultaneously: pizza often hits fat-plus-sodium and carb-plus-sodium. Frosted donuts often hit fat-plus-sugar and carb-plus-sodium. These are the ones to keep out of your house entirely. Single-combo foods you can usually handle in moderation; double-combo foods tend to win.

Don't fight the formulation in the moment. Once you've opened the bag, the engineered cue is already firing. The reliable intervention is upstream: don't keep these foods in arm's reach during ordinary home routines. Buy them in single-serve sizes when you do buy them, or buy them only when you'll eat them in a social setting where the package gets shared.

Replace, don't subtract. A pantry stripped of hyperpalatable foods and not restocked with anything filling is a pantry you'll abandon. Stock the energy-density-explained staples — high-volume produce, lean protein, fiber-rich starches — so the default lazy meal is also the default high-satiety meal. The hyperpalatable category gets crowded out, not white-knuckled out.

The Bottom Line

The Fazzino framework gave the obesity field something it had been missing for years: a clean, quantitative definition of the food category that drives compulsive intake. Three combinations — fat plus salt, fat plus sugar, and carb plus salt — at specific thresholds are enough to flag the foods that override the appetite system. The majority of items in the modern American grocery store cross at least one of those thresholds, which is why "just eat less" is such an unreliable instruction.

You can't out-discipline a formulation that was tested against thousands of consumers to be impossible to put down. You can learn to spot it, keep the worst offenders out of your default environment, and lean on foods whose math works in your favor instead of against it.

Run any food through the Hyperpalatability Detector to see which of the three Fazzino thresholds it clears — and how close it sits to the lines it doesn't.

Reference: Fazzino, T. L., Rohde, K., & Sullivan, D. K. (2019). Hyperpalatable foods: Development of a quantitative definition and application to the US food system database. Obesity, 27(11), 1761–1768.