Researchers studied 429 older adults with weight and metabolism problems to understand if ultra-processed foods (like packaged snacks, fast food, and sugary drinks) can create food addiction—a pattern where people feel unable to control their eating. After one year, people who significantly reduced their junk food intake showed improvement in food addiction symptoms. The study suggests that cutting back on ultra-processed foods may help people regain control over their eating habits and reduce cravings, offering hope for those struggling with compulsive eating patterns.
The Quick Take
- What they studied: Does eating lots of ultra-processed foods (junk food) cause food addiction, and can eating less of them help reduce addiction symptoms?
- Who participated: 429 older adults (Mediterranean region) who were overweight and had metabolic syndrome—a condition involving high blood pressure, blood sugar, and cholesterol problems.
- Key finding: People who cut back the most on ultra-processed foods were 67% more likely to improve their food addiction symptoms after one year compared to those who didn’t reduce their intake as much.
- What it means for you: If you struggle with uncontrollable eating or constant cravings for junk food, reducing ultra-processed foods may help you feel more in control. However, this study focused on older adults with specific health conditions, so results may vary for other groups.
The Research Details
This was a one-year follow-up study using data from a larger Mediterranean health research project. Researchers measured food addiction using a validated questionnaire called the Yale Food Addiction Scale 2.0, which asks about eating behaviors and cravings. They tracked what participants ate using food frequency questionnaires and categorized foods as ultra-processed or not using an international classification system called NOVA. The researchers divided participants into three groups based on how much ultra-processed food they ate at the start, then tracked changes over one year.
They used statistical methods to compare how food addiction symptoms changed across different groups. Specifically, they looked at whether people who reduced their junk food intake the most showed the biggest improvements in food addiction scores. The study design allowed researchers to see cause-and-effect relationships between reducing junk food and improving food addiction symptoms.
Understanding whether ultra-processed foods actually cause food addiction is important because it could change how doctors treat eating problems. If junk food truly creates addiction-like responses in the brain, then reducing it becomes a medical treatment rather than just a lifestyle choice. This study helps prove that connection and shows that the solution—eating less junk food—actually works.
This study has several strengths: it followed real people over a full year (not just a short time), used validated measurement tools that are recognized by scientists worldwide, and included a reasonably large group of 429 participants. However, the study only looked at older Mediterranean adults with specific health conditions, so results might not apply to younger people or different populations. The study also relied on people remembering what they ate, which can be inaccurate. Additionally, the journal is relatively new in studying food addiction, so these findings should be confirmed by other research teams.
What the Results Show
At the beginning of the study, researchers found that people eating the most ultra-processed foods were significantly more likely to show signs of food addiction compared to those eating less. When researchers looked at the three groups based on junk food consumption, the highest consumers had notably worse food addiction symptoms.
After one year, the most important finding emerged: people who made the biggest cuts to ultra-processed foods showed meaningful improvement in food addiction symptoms. Specifically, those in the highest reduction group were 67% more likely to improve their food addiction status compared to those who didn’t reduce as much. This suggests that the relationship between junk food and food addiction isn’t just a one-way street—reducing junk food can actually help reverse addiction symptoms.
The improvement wasn’t immediate or automatic; it required substantial reduction in ultra-processed food intake. People who made modest cuts didn’t see the same benefits as those who made major changes. This indicates that meaningful dietary change is necessary to see real improvements in food addiction symptoms.
The study also examined how different levels of food addiction (mild, probable, and severe) changed over the year. Participants who reduced their ultra-processed food consumption showed shifts toward better food addiction categories. The research used advanced statistical methods to map out the connections between food types, eating patterns, and addiction symptoms, revealing that ultra-processed foods specifically—rather than just overeating in general—appear to drive food addiction.
Previous research suggested that ultra-processed foods might be addictive because they contain high amounts of sugar, salt, unhealthy fats, and calories that trigger reward centers in the brain. This study provides real-world evidence supporting that theory. It goes beyond earlier laboratory studies by showing that in actual people’s lives, reducing these foods leads to measurable improvements. However, most previous research was shorter-term or didn’t specifically track food addiction changes, making this one-year follow-up study a valuable addition to the evidence.
The study only included older adults from Mediterranean regions with metabolic syndrome, so the findings may not apply to younger people, different ethnic groups, or those without metabolic problems. Participants reported their own food intake, which can be inaccurate—people often underestimate how much junk food they eat. The study couldn’t prove that ultra-processed foods directly cause food addiction in the brain; it only showed an association. Additionally, researchers couldn’t control for all factors that might affect food addiction, such as stress, sleep, or medications. Finally, the study didn’t include a control group that didn’t try to reduce junk food, making it harder to know if improvements came from the dietary change itself or other factors.
The Bottom Line
If you struggle with food cravings or feel unable to control your eating, significantly reducing ultra-processed foods may help (moderate confidence level based on this study). Focus on cutting back packaged snacks, fast food, sugary drinks, and processed meals rather than just eating smaller portions. This approach appears most effective when you make substantial changes rather than minor adjustments. However, consult with a healthcare provider or registered dietitian before making major dietary changes, especially if you have health conditions like metabolic syndrome.
This research is most relevant for older adults with weight problems and metabolic issues who experience food cravings or feel addicted to certain foods. It may also apply to younger people with similar eating patterns, though more research is needed. People with diagnosed eating disorders should work with specialists rather than relying solely on dietary changes. Those without food addiction symptoms may still benefit from reducing ultra-processed foods for general health, but the addiction-specific benefits shown here may not apply.
Based on this study, meaningful improvements in food addiction symptoms took one full year to become apparent. You might notice reduced cravings or better eating control within weeks or months, but the most significant changes appeared after sustained effort over many months. Individual results will vary based on how much you reduce junk food and your personal circumstances.
Want to Apply This Research?
- Track ultra-processed food servings daily (aim for a specific reduction target, such as cutting intake by 50% over 3 months). Log specific items like packaged snacks, fast food meals, and sugary drinks separately from whole foods to visualize progress.
- Use the app to set a weekly goal for ultra-processed food reduction (e.g., ‘Replace 2 fast food meals with home-cooked meals this week’). Create reminders for healthier alternatives when cravings hit, and celebrate weekly milestones to maintain motivation.
- Check in monthly on food addiction symptoms using simple self-assessment questions (Do I feel in control of my eating? How often do I crave junk food?). Track alongside your food log to see correlations between reduced ultra-processed food intake and improved eating control over 3-6 month periods.
This research suggests that reducing ultra-processed foods may help improve food addiction symptoms, but it is not a substitute for professional medical advice. Food addiction is a complex condition that may require support from healthcare providers, registered dietitians, or mental health professionals. If you struggle with compulsive eating, uncontrollable cravings, or eating disorders, please consult with a qualified healthcare professional before making significant dietary changes. This study focused on older adults with metabolic syndrome; results may differ for other populations. Always discuss major dietary changes with your doctor, especially if you take medications or have existing health conditions.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.