Downside of Intermittent Fasting

Author: University of Toronto, Factor-Inwentash Faculty of Social Work
Published: 2022/11/10 - Updated: 2023/01/04 - Peer-Reviewed: Yes
Topic: Eating Disorders (Publications Database)

Page Content: Synopsis Definition Introduction Main Item

Synopsis: A study finds intermittent fasting linked to all disordered eating behaviors for women, including binge eating, and compensatory behaviors like vomiting and compulsive exercise. The findings warn healthcare professionals about recommending intermittent fasting as a means of weight loss, as it may facilitate eating disorder attitudes and behaviors. In total, 47% of women, 38% of men, and 52% of transgender or gender non-conforming individuals reported intermittent fasting in the past 12 months.

Introduction

Intermittent fasting, described as fasting for greater than 8 hours at a time, is a dietary trend that continues to grow in popularity. While it is purported to positively affect one's long- and short-term health, and many use this behavior to control or lose weight, few have examined its potential harm. A new study published in the Eating Behaviors aimed to fill this research gap.

Main Item

Analyzing data from over 2,700 adolescents and young adults from the Canadian Study of Adolescent Health Behaviors, researchers found that intermittent fasting was linked to all disordered eating behaviors for women, including binge eating and compensatory behaviors like vomiting and compulsive exercise. Among men, those who engaged in intermittent fasting were more likely to report compulsive exercise.

The prevalence of intermittent fasting behaviors among adolescents and young adults was notable. In total, 47% of women, 38% of men, and 52% of transgender or gender non-conforming individuals reported engaging in intermittent fasting in the past 12 months.

"Given our findings, it is problematic how prevalent intermittent fasting was in our sample," says lead author Kyle T. Ganson, Ph.D., MSW, assistant professor at the University of Toronto's Factor-Inwentash Faculty of Social Work.

In all three groups, participants reported an average of 100 days where they engaged in intermittent fasting over the past 12 months.

"The associations found between intermittent fasting and eating disorder behaviors are particularly salient, given the significant increase in eating disorders among adolescents and young adults since the start of the COVID-19 pandemic," says Jason M. Nagata, MD, MSc, assistant professor at the University of California, San Francisco, and a study co-author.

The findings provide a warning to healthcare professionals about recommending intermittent fasting as a means of weight loss, as it may facilitate eating disorder attitudes and behaviors.

"We need more education in healthcare settings and greater awareness in popular culture, including social media, of the potential harms of intermittent fasting," says Ganson. "At this point, the proposed benefits are still unclear and unsupported by research, and the potential harms are becoming clearer."

Attribution/Source(s):

This peer reviewed publication was selected for publishing by the editors of Disabled World due to its significant relevance to the disability community. Originally authored by University of Toronto, Factor-Inwentash Faculty of Social Work, and published on 2022/11/10 (Edit Update: 2023/01/04), the content may have been edited for style, clarity, or brevity. For further details or clarifications, University of Toronto, Factor-Inwentash Faculty of Social Work can be contacted at utoronto.ca. NOTE: Disabled World does not provide any warranties or endorsements related to this article.

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