A new study suggests that food cravings may help explain why stress, anxiety, and depression are linked to weight gain. The research, published in Frontiers in Nutrition, indicates that psychological distress can alter how the brain processes hunger and reward, making cravings for high-fat, high-sugar foods more intense and harder to resist.
Researchers studied 252 adults between the ages of 19 and 65. Participants completed two validated questionnaires. One measured levels of depression, anxiety, and stress. The other measured tendencies toward food cravings. The researchers also recorded each participant’s body mass index, or BMI.
The study found that depression, anxiety, and stress were all linked to higher food cravings and higher BMI. A closer look at the data showed that food cravings accounted for about 19% of the connection between psychological distress and body weight. This means that roughly one-fifth of the reason stressed and anxious people tend to weigh more appears to be related to cravings for highly palatable foods.
How stress drives cravings
When a person is under chronic stress, the body releases the hormone cortisol. According to the study, elevated cortisol stimulates the brain’s reward system. This drives what researchers call “hedonic eating,” which is eating for pleasure and emotional relief rather than because of physical hunger. Stress-driven eating tends to target energy-dense foods such as chips, cookies, and fast food that are rich in fat and refined carbohydrates. The study notes that prior research has linked stress hormones to increased consumption of these types of foods.
The type of craving matters
Not all cravings carry the same risk. The study found that participants who followed a carbohydrate-rich or fat-rich diet had significantly stronger food cravings compared to those who followed plant-based or protein-rich diets. This suggests that the type of craving is as important as the craving itself. Frequent cravings for highly processed foods can shift eating patterns over time, contributing to weight gain in a cycle that willpower alone may not break.
The study authors note that addressing the root cause of stress-driven cravings, rather than just the craving itself, may be more effective. Approaches such as therapy and mindfulness-based stress reduction may help reduce the frequency and intensity of these cravings over time. The researchers also suggest that sustainable weight management may require a broader approach that includes mental health support alongside nutrition and exercise.
The study had limitations. It was cross-sectional, meaning it looked at data from a single point in time. The data was self-reported, and the sample was predominantly female. As a result, the findings may not apply equally across all populations.
