Overeating disorder
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Overeating Disorder: Definitions and Types
Overeating disorder, also known as compulsive overeating or binge eating, involves consuming unusually large amounts of food, often accompanied by a loss of control and emotional distress. It is distinct from occasional overeating and includes patterns such as emotional overeating, binge eating, and night eating, each with unique risk factors and clinical implications Kim2024Wiedemann2018.
Biological and Psychological Mechanisms of Overeating Disorder
Microbiota-Gut-Brain Axis
Recent research highlights the role of the microbiota-gut-brain axis in driving overeating disorders. Changes in gut microbiota, often triggered by stress and dieting history, can disrupt gut-brain signaling, leading to increased food intake. Restoring healthy gut bacteria or supplementing key metabolites can help alleviate symptoms, suggesting new therapeutic strategies .
Neurobiological and Emotional Drivers
Compulsive overeating is linked to dysfunctions in brain regions responsible for habit formation, emotional regulation, and behavioral control, such as the basal ganglia, amygdala, and prefrontal cortex. Overeating often becomes habitual, is used to relieve negative emotions, and persists despite negative consequences. These patterns share similarities with addiction .
Risk Factors and Comorbidities
Psychological and Emotional Factors
Stress, negative emotions, and low self-esteem are significant drivers of overeating. Emotional overeating is frequently triggered by feelings of loneliness, boredom, or anxiety, and is more common in individuals with binge eating disorder (BED) Anversa2021Goldschmidt2016Wiedemann2018. Poor psychosocial functioning in adolescence, especially among females, predicts more severe eating problems in adulthood .
Comorbidity with Mental Disorders
Compulsive overeating often coexists with other mental health conditions, including depression, anxiety, substance abuse, post-traumatic stress disorder, and attention deficit hyperactivity disorder. This comorbidity complicates diagnosis and treatment .
Dietary Restrictions and Behavioral Patterns
Extreme dietary restrictions, such as interval fasting, can increase the risk of compulsive overeating by causing psychoemotional imbalance. People with compulsive overeating often have distorted thoughts about food and reduced sensitivity to reward, which can lead to hidden or unrecognized eating disorders .
Demographic and Sex Differences
Overeating behaviors and their risk factors differ by sex. For example, stress and being single are more strongly associated with overeating in men, while anxiety and educational level are more relevant for women. Obesity is linked to different overeating patterns in men and women, indicating the need for tailored interventions Anversa2021Kim2024.
Health Consequences and Long-Term Outcomes
Physical Health Risks
Overeating and binge eating in adolescence are associated with higher body fat, increased inflammation, and disrupted hormone levels, which can raise the risk of future cardiovascular disease and diabetes. These risks are only partially explained by higher baseline weight .
Developmental Trajectories
While many individuals remit from overeating behaviors over time, a subset continues to experience persistent or worsening symptoms, especially those with greater psychosocial problems in adolescence. Early childhood overeating can indirectly lead to disordered eating in adolescence and young adulthood, influenced by factors like body image and peer victimization Goldschmidt2016Breton2023.
Conclusion
Overeating disorder is a complex condition influenced by biological, psychological, and social factors. It often co-occurs with other mental health issues and can lead to serious physical health risks. Understanding the diverse mechanisms and risk factors—ranging from gut microbiota changes to emotional distress and social influences—is essential for developing effective prevention and treatment strategies. Early intervention, psychological support, and personalized approaches are key to addressing this pervasive disorder.
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