Feeling blue? That may not be a great excuse to tuck into some mac and cheese.
For many of us, chicken soup can soothe the soul and mac and cheese can erase a bad day. We eat chocolate when we feel gloomy, or when we've been in the presence of a Dementor. And we eat chocolate ice cream to help us get over a bad breakup.
These comfort foods usually aren't so good for our arteries, but we tend to think they have healing properties — that they're the antidote for all our emotional afflictions.
But maybe they're not, says Traci Mann, a professor of psychology at the University of Minnesota. In a recent study, Mann and some colleagues induced a bad mood in 100 college students by making them watch clips from sad movies. They then fed half the students their favorite comfort food, while the other students ate food they enjoyed, but wouldn't consider comfort food.
Once the students had finished eating, the researchers asked the students how they felt. It turns out all the students felt better, regardless of what they had eaten.
"That is not what we expected," Mann says. "We kept repeating the study, because we didn't believe it."
In another experiment, Mann had half the kids eat comfort food, and the other half eat nothing. After a few minutes, both groups felt equally better. The comfort food had no effect on mood.
The results of these experiments appeared in the August issue of Health Psychology. "People are taking this very hard," Mann says. "I guess it removes a very handy justification people have for eating comfort food."
Of course, the study has a few significant limitations. For one, it only looked at a particular kind of negative mood — induced by watching sad films. Other studies have come to different conclusions. For example, one in 2011, published in the journal Psychological Science, suggested that eating chicken soup may help some feel less lonely.
And the researchers didn't look at the real-life contexts in which people eat comfort foods. "Maybe the comfort from comfort food comes from going to a cafe acquiring it," Mann says. The research on the psychological effects of comfort food is fairly scant, she notes, so we don't have any definite answers yet.
David Levitsky, a professor of nutrition at Cornell University, says Mann's research is in line with what he would have expected. "We tend to look for a magic solution to our problems," Levitsky says.
The idea that we can feel better by simply consuming certain foods is very appealing, he says, "but in actuality, feeling better has nothing to do with the food itself, and it's a very weak psychological effect."
