Eating Disorders and Addiction: Understanding the Overlap

Eating disorders and addiction can occur together because they may share risk factors and serve similar short-term functions, such as numbing distress, seeking control or changing how a person feels about their body. Each condition can also reinforce the other. Restricting food may intensify substance effects, for example, while intoxication or withdrawal can make regular eating and emotional regulation more difficult.

The overlap is medically important. Eating disorders and substance use disorders are serious, treatable conditions—not choices or failures of willpower. When both are present, the safest approach is usually coordinated care that assesses nutrition, physical health, mental health and substance use together. Immediate threats, such as severe malnutrition, overdose or dangerous withdrawal, must be stabilized first, but neither condition should then be ignored. (library.samhsa.gov)

What does the overlap between eating disorders and addiction mean?

An eating disorder involves persistent disturbances in eating behavior and related thoughts or emotions that impair health or daily functioning. Diagnoses include anorexia nervosa, bulimia nervosa, binge-eating disorder and avoidant/restrictive food intake disorder (ARFID), as well as other specified conditions.

A substance use disorder involves difficulty controlling alcohol or drug use despite harmful consequences. It is different from tolerance or physical dependence, although these can occur together. Our guide to addiction, dependence and tolerance explains these distinctions in more detail.

Having disordered eating does not automatically mean someone has an eating disorder, just as using a substance does not automatically indicate addiction. A qualified professional assesses the pattern, its purpose, loss of control, distress, medical effects and impact on daily life.

Eating disorders affect people of every gender, age, race, body size and background. A person can be seriously unwell without appearing underweight, and appearance alone cannot show whether either condition is present. (nimh.nih.gov)

Why do eating disorders and substance use disorders occur together?

There is no single explanation, and one condition does not always cause the other. The relationship usually involves several interacting factors.

Shared biological and psychological vulnerabilities

Research suggests that eating disorders and substance use disorders may share some genetic, neurological and metabolic risk factors. Systems involved in reward, stress responses and executive control may contribute, but this does not mean a person is biologically destined to develop either condition. (library.samhsa.gov)

Certain traits or experiences may also increase vulnerability, including:

• Difficulty tolerating intense emotions
• Impulsivity or compulsive behavior
• Perfectionism and rigid thinking
• Anxiety, depression or low self-worth
• Trauma and adverse childhood experiences
• Social pressure involving weight, appearance or performance

Trauma is a risk factor, not a universal explanation. Treatment should not assume that every person has experienced trauma or require someone to discuss it before they feel safe and ready. (library.samhsa.gov)

Attempts to manage emotions

Substances and eating-disorder behaviors may temporarily reduce anxiety, numb painful feelings or create a sense of control. Binge eating, restriction, purging or substance use can therefore become learned responses to loneliness, shame, anger, trauma reminders or interpersonal conflict.

The relief is often brief. Distress may return alongside physical symptoms, secrecy or self-criticism, strengthening the urge to repeat the behavior. This is one reason advice to “just stop” is rarely sufficient.

Weight and appetite motives

Some people misuse stimulants, nicotine, diet pills or other substances in an attempt to suppress appetite or change weight. Others restrict food before or after drinking because they fear weight gain. The informal term “drunkorexia” is sometimes used for this pattern, but it is not a medical diagnosis.

Laxative and diuretic misuse should also be disclosed during assessment. These products do not remove most calories already absorbed, but misuse can contribute to dehydration and dangerous electrolyte disturbances. Not every instance represents addiction, yet it can be part of an eating disorder and requires medical attention. (library.samhsa.gov)

A self-reinforcing cycle

The two conditions can maintain each other in different ways:

• Intoxication may reduce inhibition, increasing the likelihood of bingeing or purging.
• Restriction and dehydration may worsen weakness, dizziness and other substance-related risks.
• Substance use may disrupt sleep, appetite, medication use and attendance at treatment.
• Shame after eating or using a substance may trigger another attempt to restrict, purge or become intoxicated.
• Changes in appetite during early sobriety may activate fears about food or body shape.

These patterns vary. Understanding an individual’s cycle is more useful than assuming that everyone uses substances or food-related behaviors for the same reason.

Warning signs that both conditions may be present

Symptoms can be hidden, and some signs overlap with depression, anxiety, physical illness or the effects of substances. A fuller assessment may be appropriate when several of the following occur together:

• Frequent dieting, fasting or skipping meals
• Binge eating or feeling unable to stop eating
• Self-induced vomiting or misuse of laxatives, diuretics or diet products
• Rigid rules around food, exercise or body checking
• Significant weight changes at any starting body size
• Drinking or using drugs to suppress appetite or cope with eating
• Restricting food before drinking or using substances
• Increased substance use after a binge or perceived dietary “mistake”
• Secrecy about eating, exercise, prescriptions or substance use
• Repeated blackouts, withdrawal symptoms or unsuccessful attempts to cut down
• Guilt, fear or preoccupation involving food, weight or substances
• Declining health, relationships, work or school performance

Screening questionnaires can help identify concerns, but they cannot provide a diagnosis. Some established eating-disorder screens are also less accurate for men, people with binge-eating disorder and culturally diverse populations. A comprehensive conversation should consider muscularity concerns, sensory-based food restriction and behaviors that are not focused on thinness. (library.samhsa.gov)

Medical risks and when to seek urgent help

Malnutrition, purging and substance use can each affect the heart, brain, digestive system and fluid balance. Together, they may increase the complexity of dehydration, electrolyte disturbance, impaired judgment, overdose and medication interactions.

Seek urgent medical care for fainting or loss of consciousness, a seizure, severe confusion, chest pain, trouble breathing, suspected overdose, vomiting blood, severe dehydration or symptoms of a dangerously abnormal heartbeat. Severe malnutrition, abnormal vital signs and electrolyte disturbances may also require hospital care. (library.samhsa.gov)

Contact local emergency services if there is immediate danger. In the United States, call 911 for a life-threatening emergency. Call or text 988 for a suicide or mental health crisis. Outside the US, use your country’s emergency or crisis service.

Alcohol and benzodiazepine withdrawal warning

A person who has been drinking heavily over a prolonged period should not assume that stopping suddenly at home is safe. Alcohol withdrawal can become life-threatening, with possible seizures or delirium. Regular benzodiazepine use can also cause dangerous withdrawal if the medication is abruptly stopped or rapidly reduced. Medical advice is important before making either change. (niaaa.nih.gov)

Learn more about alcohol withdrawal symptoms and warning signs.

What integrated treatment looks like

Evidence-based medical guidance: Both conditions should be assessed and addressed, while the most immediate health or safety threat receives priority. SAMHSA recommends integrated or closely coordinated care because separating treatment can leave one condition actively undermining the other. However, research into the best specific protocols for co-occurring eating and substance use disorders remains limited. (library.samhsa.gov)

A care team may include:

• A primary care physician or other medical clinician
• An eating-disorder therapist or psychiatrist
• An addiction treatment professional
• A registered dietitian with eating-disorder experience
• Family members or other supporters, with the person’s agreement

Assessment may involve eating patterns, substance use, withdrawal history, physical symptoms, medications, mental health, suicide risk and relevant laboratory or heart monitoring. The goal is not to police food or demand immediate disclosure. It is to identify risk and create care that does not send conflicting messages.

Medical and nutritional stabilization

Severe dehydration, malnutrition, intoxication, withdrawal or electrolyte problems may need treatment before someone can participate fully in therapy. Nutritional rehabilitation should be clinically supervised when malnutrition is significant because refeeding can sometimes cause dangerous metabolic changes. (library.samhsa.gov)

Psychological treatment

Depending on the diagnoses, age and circumstances, treatment may include eating-disorder-focused cognitive behavioral therapy, interpersonal psychotherapy, dialectical behavior therapy or family-based treatment. Family-based approaches have particular evidence for adolescents and some young adults with involved caregivers.

Therapy can address both the behaviors and their functions: emotional avoidance, cravings, rigid rules, body-image distress, interpersonal conflict and difficulty tolerating urges. Trauma-focused work may be helpful for some people, but safety and stabilization generally come first. (library.samhsa.gov)

Medication

Medication may help treat certain eating disorders, substance use disorders or co-occurring depression and anxiety. There is no single medication for the overall overlap. Prescribers need a complete account of substance use, purging, nutrition and all prescription or nonprescription products because these factors can affect medication safety and suitability. Medication should not be started, stopped or changed without professional guidance.

Practical steps for seeking help

The following are practical suggestions, not a personalized treatment plan:

1. Start with the clearest available entry point. This may be primary care, an eating-disorder service, an addiction provider or a mental health clinician. You do not need to decide which condition is “the real problem” first.
2. Describe the connection directly. For example: “My drinking changes how I eat,” or “I use stimulants because I am afraid of gaining weight.”
3. Ask whether the provider screens for both conditions. If not, request coordinated referrals rather than waiting to finish one treatment before addressing the other.
4. Bring a complete substance and medication list. Include alcohol, supplements, diet products, laxatives, diuretics and medications not taken as prescribed.
5. Choose support that avoids weight stigma and moralizing food. Providers should treat people with dignity at every body size.
6. Build communication between services. With appropriate consent, shared plans can reduce contradictory advice and gaps in care.

A trusted support network can help with appointments, meals, transportation and difficult conversations. See how to build the right recovery support system for practical ideas.

Finding care in the US and internationally

United States: SAMHSA’s FindTreatment.gov and National Helpline at 1-800-662-HELP (4357) can help people locate mental health and substance-use services. Ask specifically whether a program treats co-occurring eating disorders and substance use disorders, provides medical monitoring and accepts your insurance. (samhsa.gov)

Outside the United States: Service structures, professional titles, crisis numbers and payment systems differ. A primary care clinician or national health service can usually direct you to local eating-disorder and addiction care. WHO supports integrated approaches to mental health, physical health and substance-use services, although access varies substantially between countries. (who.int)

Conclusion

Eating disorders and addiction can overlap through shared vulnerabilities, emotional coping, appetite or weight concerns and self-reinforcing behavior cycles. Neither condition can be identified by appearance, and neither is a moral failing.

When both are present, coordinated medical, nutritional, psychological and substance-use care offers a safer foundation than treating them as unrelated problems. A person does not need to wait until symptoms look severe—or until one condition is completely resolved—to ask for help with both.

Frequently asked questions

1. Which eating disorder is most commonly associated with addiction?

Substance use disorders can occur with any eating disorder, but research often identifies a strong overlap with bulimia nervosa and the binge-purge presentation of anorexia nervosa. Binge-eating disorder can also co-occur with alcohol or other substance problems. These trends cannot predict an individual diagnosis. (library.samhsa.gov)

2. Can addiction treatment make an eating disorder worse?

It can expose or intensify symptoms if appetite changes, weight concerns or rigid attitudes toward sugar and food are handled insensitively. This is not a reason to avoid addiction treatment. It is a reason to screen for eating concerns and coordinate care rather than recommending restrictive diets or discussing weight casually.

3. Should the addiction or eating disorder be treated first?

Immediate dangers come first, including overdose, severe withdrawal, suicidality, dehydration or medical instability. After stabilization, guidance generally supports addressing both conditions concurrently or through closely coordinated services instead of postponing one indefinitely. (library.samhsa.gov)

4. Is binge eating the same as food addiction?

No. Binge-eating disorder is a recognized diagnosis involving recurrent loss-of-control eating and significant distress without regular compensatory behavior. “Food addiction” is a debated research concept and is not interchangeable with binge-eating disorder. A clinical assessment considers the full pattern rather than relying on the feeling that a particular food is addictive.

5. How can I support someone with both conditions?

Listen without commenting on weight, appearance or how much the person eats. Express concern about specific changes, encourage professional assessment and offer concrete help, such as making a call or attending an appointment. If there are signs of overdose, dangerous withdrawal, medical instability or suicidal intent, contact local emergency services rather than trying to manage the situation alone.