Why Is Changing Your Diet So Hard?
Learning new eating habits isn't simple. According to new research from Yale School of Medicine, our pre-existing feelings around food—whether it's a distaste for olives or a love of pastries—could make it harder to learn new eating habits. The study was published Oct. 9 in Communications Psychology.
Changing how we eat can have a big impact on health, both for managing conditions like diabetes and for maintaining overall well-being. But people often struggle to switch up their diet. Now, a new study suggests that how we feel about food going in may play a role.
Study Design: Challenging Participants' Food Preferences
In an experiment designed to challenge their opinions about food, researchers recruited around 280 people and had them identify four snacks they had strong feelings about—two they liked and two they disliked. Participants were then asked to predict whether a computer program would assign positive or negative points to these snacks.
The associations between food items and points changed repeatedly during the experiment. In some trials, the test reinforced participants' instincts by assigning positive points to snacks they liked and negative points to snacks they disliked. In other trials, participants were required to do the opposite.
Key Findings: Early Challenge Makes Change Easier
- Preferences are hard to reverse: Everyone struggled to go against their feelings and assign negative points to what they liked, and positive points to what they didn't.
- Priming effect is significant: People who started the experiment with the condition that reinforced their feelings had more difficulty switching their predictions.
- Adding is easier than removing: Participants had an easier time assigning new values to food they didn't like than to food they did. This reinforces anecdotal evidence suggesting it's easier to add things to your diet than to remove them.
"Our pre-existing preferences for food are very strong and hard to change," says Ifat Levy, PhD, Elizabeth Mears and House Jameson Professor of Comparative Medicine at Yale School of Medicine. "But there might be slight manipulations that could make a big difference."
Implications for Dietary Interventions
First author Alex Rich, PhD, notes that this finding suggests priming—where our introduction to a concept or object shapes how we feel about it later—might play a role in how we learn about food. For people looking to adopt new eating habits, this might mean that challenging your feelings about food from the get-go could make the transition easier.
"Say, broccoli isn't your favorite thing. Maybe we can integrate it more easily than to stop eating ice cream," says Rich. This is particularly important for dietary interventions in obesity and binge eating disorder, as research shows people who binge eat don't do as well in dietary interventions for obesity as those who do not binge eat.
Xiaoshu Health: Scientifically Manage Your Eating Habits
Changing eating habits is a key step in managing chronic conditions like diabetes and hypertension. Xiaoshu Health App can sync with Apple Health to track relevant metrics, helping you record how dietary changes affect health data such as blood sugar and blood pressure, making scientific dietary management more intuitive and effective.