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This is a clinician-written, evidence-based summary aligned to the 2026 MLA Content Map. It is intended for medical students and junior doctors preparing for the UKMLA. Always cross-reference with NICE guidance, local protocols, and clinical judgement.
Key points
- Recurrent binge eating with loss of control — eating large amounts rapidly, when not hungry, until uncomfortably full
- NO compensatory purging — distinguishes from bulimia nervosa
- Associated with marked distress, shame, guilt, and disgust after bingeing
- Most common eating disorder — affects ~2–3% of adults. Strongly associated with obesity
- First-line: binge eating disorder-focused guided self-help (CBT-ED based)
- If guided self-help insufficient: individual or group CBT-ED. Address weight management concurrently but separately
Overview
Binge eating disorder (BED) is the most common eating disorder, characterised by recurrent episodes of eating large quantities of food rapidly and with a subjective sense of loss of control, without the compensatory purging behaviours seen in bulimia nervosa. Episodes are associated with eating much more rapidly than normal, eating until uncomfortably full, eating large amounts when not physically hungry, eating alone due to embarrassment, and feeling disgusted, depressed, or guilty afterwards. The diagnosis requires binge episodes occurring at least once weekly for 3 months and causing marked distress. BED is strongly associated with obesity and its medical complications, though not all individuals with BED are obese.
Epidemiology
BED has a lifetime prevalence of approximately 2–3% and is the most common eating disorder. It has a more equal sex ratio than anorexia or bulimia (approximately 3:2 female:male). Typical onset is in adulthood (20s–30s). Risk factors include childhood obesity, parental overweight, childhood adversity, dieting behaviour, and comorbid depression/anxiety. BED is found in approximately 30% of people seeking weight loss treatment. It is associated with higher rates of metabolic syndrome, type 2 diabetes, cardiovascular disease, and musculoskeletal disorders related to obesity.
Clinical Features
Symptoms
Binge eating: consuming objectively large amounts of food in a discrete period with loss of control
Eating much more rapidly than normal during binge episodes
Eating until uncomfortably full
Eating large amounts when not physically hungry
Eating alone due to embarrassment about the quantity consumed
Feeling disgusted, depressed, or very guilty after bingeing — marked distress
NO compensatory purging behaviours (no vomiting, laxatives, fasting, excessive exercise)
Signs
Overweight or obese BMI in many (but not all) patients
Distress and shame when discussing eating behaviour
No physical signs of purging (no Russell sign, no dental erosion, no parotid enlargement)
Investigations
First-line
Clinical diagnosisBased on history: binge eating ≥1×/week for 3 months + loss of control + marked distress + NO purging
BMI and metabolic screenWeight, BMI, glucose/HbA1c, lipid profile, BP — assess for obesity-related complications
Second-line
Screen for comorbidityDepression (PHQ-9), anxiety (GAD-7) — very common. Screen for other eating disorders (rule out bulimia)
Specialist
Specialist eating disorder assessmentIf severe, treatment-resistant, or significant psychiatric comorbidity
1
First-line: guided self-help
- BED-focused guided self-help based on CBT-ED principles — with professional support over 4–9 sessions, 16 weeks
- Aims to establish regular eating patterns, reduce binge episodes, address maintaining factors
2
If guided self-help insufficient
- Individual or group CBT-ED — adapted for binge eating disorder
- Address psychological maintaining factors: emotional eating, dietary restraint, body image concerns
3
Weight management
- Address weight management alongside but separately from eating disorder treatment
- Behavioural weight management programmes after binge eating is controlled
- Consider orlistat or GLP-1 agonists for obesity if appropriate
- Bariatric surgery may be considered for severe obesity — screen for BED before surgery
4
Pharmacotherapy
- SSRIs (sertraline, fluoxetine) may reduce binge frequency — but not first-line
- No medication specifically licensed for BED in the UK
- Treat comorbid depression and anxiety per respective guidelines
Complications
- Obesity: Strong association — with metabolic syndrome, T2DM, cardiovascular disease
- Depression: ~50% comorbidity — bidirectional relationship
- Reduced quality of life: Shame, social withdrawal, impaired functioning
- Gastric distension: Rarely, acute gastric dilatation or rupture from massive binge
- Poor surgical outcomes: BED increases risk of weight regain after bariatric surgery if untreated
UKMLA Exam Tips
- 1BED = binge eating with loss of control + NO PURGING. Bulimia = binge eating + PURGING
- 2Most common eating disorder. More equal sex ratio than anorexia/bulimia
- 3Guided self-help (CBT-based) is first-line — NOT medication
- 4BMI is typically normal or elevated (overweight/obese). Absence of purging signs distinguishes from bulimia
- 5Distress about bingeing is a REQUIRED diagnostic criterion — it is not simply overeating
- 6Screen for BED before bariatric surgery — untreated BED worsens surgical outcomes
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