According to Gram Research analysis, people expect branded unhealthy foods like chocolate and fizzy drinks to improve their mood far more than healthy foods, and this expectation directly links to worse diet quality and more frequent comfort eating. A study of 1,203 UK adults found that those with stronger positive expectations about junk food consumed lower-quality diets overall, with the strongest connections for ice cream, fizzy drinks, and chocolate.
A new study of over 1,200 UK adults reveals why people reach for unhealthy snacks when feeling down. Researchers found that people expect branded junk foods like chocolate and fizzy drinks to make them feel better emotionally. This expectation is so strong that it actually leads to worse eating habits and more comfort eating when people are stressed or sad. The study suggests that changing how we think about these foods, rather than just telling people to eat better, might be the key to improving diet quality and breaking the comfort eating cycle.
Key Statistics
A 2026 cross-sectional study of 1,203 UK adults found that people expected branded unhealthy foods to produce positive emotions significantly more than generic healthy foods, with a statistical difference of 0.10 points on the expectancy scale.
Research from 1,203 UK adults showed that stronger positive expectations about unhealthy foods like ice cream sundaes, fizzy drinks, and chocolate were associated with worse overall diet quality, with correlation coefficients ranging from -0.14 to -0.19.
A 2026 study of 1,203 UK adults revealed that people who frequently comfort eat showed both stronger positive expectations for unhealthy foods and stronger negative expectations for healthy foods, suggesting a double barrier to healthy eating.
According to research reviewed by Gram, branding significantly amplified emotional expectations for unhealthy foods in a sample of 1,203 UK adults, but had minimal effect on expectations for healthy foods.
The Quick Take
- What they studied: Why people expect certain foods to make them feel happy, and whether these expectations affect their eating habits and diet quality
- Who participated: 1,203 UK adults with an average age of 47 years, about half women, mostly white, representing a typical cross-section of the adult population
- Key finding: People expected branded unhealthy foods (like Cadbury chocolate) to improve their mood more than generic healthy foods. Those with stronger expectations about junk food improving their mood actually ate worse diets and comfort ate more often when stressed
- What it means for you: Understanding that your brain expects junk food to fix your emotions is the first step to changing the habit. Simply being aware of this expectation may help you make different choices when you’re feeling down
The Research Details
Researchers recruited 1,203 adults from across the UK and showed them pictures of different foods and drinks. Participants rated how much they expected each food to make them feel good emotionally. They also answered questions about what they actually eat, how often they eat when sad or stressed, and basic information about themselves like age and income.
The researchers then looked for patterns. They checked whether branded unhealthy foods (like famous chocolate bars) got higher emotional expectancy ratings than plain healthy foods. They also examined whether people who expected junk food to improve their mood actually had worse diets and ate more when experiencing negative emotions.
This approach is called an observational study because researchers watched and measured what people already think and do, rather than randomly assigning people to different eating programs and testing the results.
This research matters because it focuses on the psychological side of eating habits rather than just willpower or nutrition facts. If we understand why people expect certain foods to make them feel better, we can design better strategies to help them make healthier choices. The study also shows that branded foods have extra power over our emotions, which is important information for food policy makers.
The study included a large, representative sample of UK adults, meaning the results likely reflect the general population. However, because it’s observational rather than experimental, we can see that expectations and diet quality are connected, but we cannot prove that expectations directly cause poor eating habits. The study measured everything at one point in time, so we don’t know if these patterns stay the same over months or years.
What the Results Show
The strongest finding was that people expected branded unhealthy foods to improve their emotions significantly more than generic healthy foods. For example, a branded chocolate bar received much higher emotional expectancy ratings than a plain prawn curry dish.
People who had strong positive expectations about unhealthy foods, especially ice cream sundaes, fizzy drinks, and chocolate, actually had worse overall diet quality. The connection was strongest for these three specific foods. This suggests that the more you expect a junk food to make you feel good, the more likely you are to eat poorly overall.
The study also found that people who frequently eat when sad or stressed (comfort eating) tend to have stronger positive expectations about unhealthy foods. Interestingly, they also had stronger negative expectations about healthy foods, meaning they expected healthy foods to make them feel worse. This double expectation problem may trap people in comfort eating patterns.
The research showed that branding matters more for unhealthy foods than healthy ones. A branded chocolate bar had stronger emotional appeal than a generic chocolate bar, but branding didn’t change expectations as much for healthy foods. This suggests that marketing and brand recognition specifically amplify our emotional expectations for junk food. Additionally, people who comfort eat frequently showed negative expectations for both healthy and unhealthy foods, suggesting they may feel that no food will truly help their mood.
This study builds on expectancy theory, a psychological principle that says people are drawn to things they expect will make them feel good. Previous research has shown this works for many behaviors, but this is one of the first large studies to apply it specifically to food choices and comfort eating in a general adult population. The findings align with earlier research showing that branded foods have stronger emotional appeal, and that comfort eating is linked to negative emotions.
Because this study only measured people at one point in time, we cannot prove that expectations cause poor diet quality. It’s possible that people who already eat poorly develop stronger expectations about junk food, rather than the expectations causing the poor diet. The study also relied on people self-reporting their eating habits, which may not be completely accurate. Additionally, most participants were white, so the results may not apply equally to all ethnic groups in the UK.
The Bottom Line
If you struggle with comfort eating, try becoming aware of your expectations about food. When you reach for a snack because you’re sad, pause and notice what you expect it will do for your emotions. This awareness alone may help you make different choices. Consider challenging negative expectations about healthy foods by trying them when you’re in a good mood, so you can experience them positively. For policy makers and food companies, the research suggests that reducing marketing and branding of unhealthy foods may help reduce comfort eating. Confidence level: Moderate, based on observational data.
Anyone who eats when stressed or sad should pay attention to this research. People trying to improve their diet quality will benefit from understanding the emotional expectations driving their food choices. Parents and educators can use this information to help young people develop healthier food expectations. Food policy makers should consider how branding influences emotional expectations about unhealthy foods.
Changing food expectations is a gradual process. You may notice shifts in your eating patterns within 2 to 4 weeks of consciously challenging your expectations about comfort foods. Significant diet quality improvements typically take 8 to 12 weeks of consistent awareness and behavior change.
Frequently Asked Questions
Why do I crave junk food when I’m sad or stressed?
Your brain expects junk food to make you feel better emotionally, especially if it’s a branded product you’ve seen advertised. A 2026 study of 1,203 adults found that people with stronger expectations about unhealthy foods eating more when stressed, creating a comfort eating cycle.
Does branding really make unhealthy food more appealing?
Yes. Research showed that branded unhealthy foods received significantly higher emotional expectancy ratings than generic versions of the same foods. Branding amplifies the expectation that eating the food will improve your mood.
Can changing my expectations about food actually help me eat better?
Possibly. The study found that people with stronger positive expectations about junk food had worse diets overall. By becoming aware of these expectations and challenging them, you may be able to make different choices and gradually improve your diet quality.
What should I do instead of comfort eating when I’m feeling down?
First, pause and notice what you expect the food to do for your emotions. Then try a healthier alternative and track how it actually makes you feel. Over time, building positive experiences with healthy foods can shift your expectations and reduce comfort eating.
Are healthy foods really less likely to improve my mood?
Not necessarily. The study found that people who comfort eat often have negative expectations about healthy foods, but this doesn’t mean healthy foods can’t improve mood. Eating nutritious foods actually supports better mental health over time.
Want to Apply This Research?
- Log each time you eat when experiencing negative emotions, noting what you expected the food to do for your mood and whether it actually helped. Track this daily for 2 weeks to identify your specific comfort food triggers and expectations.
- When you feel the urge to comfort eat, use the app to pause and write down what emotion you’re feeling and what you expect the food to do. Then choose one healthier alternative and note how it actually makes you feel. Over time, this builds new, more realistic expectations.
- Review your comfort eating log weekly to spot patterns in which emotions trigger eating and which foods you expect to help. Gradually introduce positive experiences with healthy foods by eating them during good moods, then track how your expectations shift over 4 to 8 weeks.
This research is observational and shows associations between food expectations and eating habits, but does not prove that expectations directly cause poor diet quality. Individual responses to food and emotions vary widely. If you struggle with emotional eating or have concerns about your diet, consult a registered dietitian or healthcare provider for personalized guidance. This article is for informational purposes only and should not replace professional medical or nutritional advice.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.