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Why being impulsive might put you at risk for food addiction

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An impulsive personality has long been associated with addiction to alcohol and drugs. Impulsive people are more likely to act rashly when they are feeling bad, for example, making them more likely to use drugs or alcohol when they experience a low. Now, psychologists think impulsivity may lead to another problematic behavior – addictive eating.

People with an impulsive personality were found to be more likely to have a food addiction in a recent study by University of Georgia researchers published in the journal Appetite. People reporting higher levels of food addiction were also more likely to have a higher body mass index (BMI). In other words, impulsive people weren’t necessarily overweight, but impulsivity was associated with a compulsive relationship with food and, as a result, less healthy weight.

The concept of food addiction stems from other parallels between food consumption and addictive drug use.  Supporting neurobiological data links tasty food with dopamine release similar to that which occurs when people consume other addictive substances. Food addiction as a whole remains controversial, but researchers at Yale University developed a method for identifying possible food addiction. The measure, known as the Yale Food Addiction Scale, is based on behaviors and characteristics used to diagnose other types of addiction.

The UGA researchers in the lab of clinical psychologist James MacKillop used the scale to test 233 participants for food addiction. They also measured BMI and then used another scale, the UPPS-P Impulsive Behavior Scale, to gauge how impulsive individuals were.

Impulsivity actually includes multiple personality traits. Personality traits vary among people, but they tend to be stable over time in individuals.

Two traits involved in impulsivity, known as negative urgency and lack of perseverance, were especially related to food addiction and high BMI in the UGA study.

Negative urgency refers to the tendency to behave rashly when experiencing negative emotions. For some, that means drinking alcohol or doing drugs. For others, that might mean eating to get rid of a bad mood – a situation that could lead to weight gain.

Lack of perseverance is difficulty following through with hard or boring tasks. People with high levels of this aspect of impulsivity might have a hard time following through with attempts to change addictive eating behaviors, which could also cause an overweight or obese BMI.

Impulsivity has been shown to be associated with weight gain in previous studies. Overweight or obese children were found to be more impulsive than healthy children, according to one 2013 review. One 2010 study found overweight and obese women had higher levels of negative urgency and lack of perseverance.

Impulsivity might be one reason some people eat in an addictive way despite societal motivation against weight gain, according to Ashley Gearhardt, a clinical psychologist who helped develop the Yale Food Addiction Scale.

“One of the key hallmarks of addiction is impulsivity,” said Gearhardt, who is now an assistant professor at the University of Michigan. “We were theorizing that if food addiction is really a thing, then our measure [the Yale Food Addiction Scale] should be related to impulsive action.”

Given the parallels between addictive eating and other addictive behaviors, MacKillop thinks therapies used to treat other addictive behaviors could help people eat in a healthy way.

Mackillop’s group uses an in-house bar lab to provide self-control training to people with alcohol addiction. The drinker spends time in the bar lab, where craving is induced but not fulfilled. A person might be poured their favorite drink and asked to lift it to their nose but not drink, for example. MacKillop found that over time people became less sensitive to these alcohol cues and were able to reduce their drinking.

“Most of the programs for weight loss at this point focus on the most obvious things, which are clearly diet and exercise,” MacKillop said. “It seems like craving management or managing acute desires to eat would have a natural fit within the domain of skills a person would need to eat healthily.”

Julianne Wyrick About the Author: Julianne Wyrick has a bachelor’s in biochemistry and is currently a master’s student in the health and medical journalism program at the University of Georgia, where she also writes about science for the Office of Research Communications. Find her on the web at Follow on Twitter @juliannewyrick.

The views expressed are those of the author and are not necessarily those of Scientific American.

Comments 4 Comments

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  1. 1. Uncle.Al 2:34 pm 12/20/2013

    Advertising less impulse consumption equals bankruptcy. You decry what is implicit within consumerism. The alternative is the State as moralist and provider. The State then outlaws keeping the money you earn lest you breach a monopoly of spending it unwisely.

    Compassion is a moralist’s evolutionarily stupid act committed through other peoples’ wallets. God awards everyone full reign for all pleasures and addictions – one day after outlawing all healthcare and other insurance. Personal responsibility is the only moral arbiter. Think of it as evolution in action.

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  2. 2. Tcagle 2:45 pm 12/20/2013

    GOD is imaginary!

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  4. 4. foodaddicts 3:15 pm 01/24/2014

    Many people find help in Food Addicts in Recovery Anonymous. Some of us have been diagnosed as morbidly obese while others are undereaters. Among us are those who were severely bulimic, who have harmed themselves with compulsive exercise, or whose quality of life was impaired by constant obsession with food or weight. We tend to be people who, in the long-term, have failed at every solution we tried, including therapy, support groups, diets, fasting, exercise, and in-patient treatment programs.

    FA has over 500 meetings throughout the United States in large and small cities such as Boston, San Francisco, Los Angeles, New York, Charlotte, Grand Rapids, Atlanta, Fort Lauderdale, Austin, and Washington, D.C. Internationally, FA currently has groups in England, Canada, Germany, New Zealand and Australia. If you would like more information about FA, please check out our website. If there aren’t any meetings in your area, you can contact the office by emailing fa at foodaddicts dot org, where someone will help you.

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