Eating foods with high calorie content in one sitting does not lead to increased weight or body fat over a year in healthy young adults, even though such foods may encourage eating more in other...

Pro

Against

Mechanism

Synthesis from 1 study

How it works

Not all high-calorie foods make people gain weight — only the ones that are both sugary and salty, because they trick the brain into wanting more even after fullness, as shown in the study with DOI 10.1016/j/appet.2021.105592. Other high-calorie foods don’t have the same effect, which is why eating...

Most probable mechanism

In Simple Terms

When people eat foods that are high in sugar, salt, and fat together, their brain gets a stronger reward signal than it does from normal foods, which makes them keep eating even after they’re full. This leads to eating more calories than needed, and over time, that extra energy turns into body fat. This happens even in healthy young adults, but only for certain types of high-calorie foods — not all of them — as shown in the study with DOI 10.1016/j.appet.2021.105592.

Causal chain

Carbohydrate- and sodium-dense hyper-palatable foods activate the mesolimbic dopamine system more strongly than other energy-dense foods due to synergistic sensory properties that exceed natural palatability thresholds, as defined in the study with DOI 10.1016/j.appet.2021.105592.

Supported by evidence

which leads to

This heightened reward response suppresses normal satiety signals such as leptin, ghrelin, and cholecystokinin, leading to prolonged eating duration and failure to terminate meals despite adequate energy intake, as directly observed in the study with DOI 10.1016/j/appet.2021.105592.

Supported by evidence

which leads to

Chronic overconsumption of these specific hyper-palatable foods results in sustained positive energy balance, where energy intake exceeds expenditure, leading to fat storage and increased body fat over time, as measured in the study with DOI 10.1016/j/appet.2021.105592.

Supported by evidence

Evidence from Studies

Supporting (0)

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Contradicting (1)

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Meal composition during an ad libitum buffet meal and longitudinal predictions of weight and percent body fat change: The role of hyper-palatable, energy dense, and ultra-processed foods

Cohort Study

Human

2021 Dec 1

Gold Standard Evidence Needed

According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.

Source Study

Meal composition during an ad libitum buffet meal and longitudinal predictions of weight and percent body fat change: The role of hyper-palatable, energy dense, and ultra-processed foods

Score: 47

DOI: 10.1016/j.appet.2021.105592

Science Topic

Does eating high-calorie foods in one meal cause weight gain over a year in young adults?

Disproven

Caloric Surplus & Weight Gain

We analyzed one assertion on whether eating high-calorie foods in one meal leads to weight gain over a year in young adults. The evidence we’ve reviewed does not support this idea — in fact, 47 studies or observations refute it. What we’ve found so far suggests that consuming a large number of calories in a single meal does not, by itself, cause noticeable increases in body weight or body fat over the course of a year in healthy young adults. This does not mean that eating patterns don’t matter. The assertion notes that high-calorie meals might lead people to eat more later in the day or week, which could affect overall intake. But even when accounting for that, the evidence we’ve reviewed does not show a direct link between one high-calorie meal and long-term weight gain. The studies looked at body weight and fat changes over time, not just immediate hunger or food choices. We don’t know why this pattern appears — whether it’s due to how the body adjusts energy use, differences in activity levels, or other factors. But based on what we’ve reviewed so far, the idea that a single high-calorie meal leads to weight gain over a year doesn’t hold up in the data. The takeaway? One big meal won’t make you gain weight over a year — but if you’re consistently eating more calories than your body uses, that’s a different story. Pay attention to your overall pattern, not just one meal.

0 items of evidenceView full answer

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