What Are the Causes of Eating Disorders? Moving Beyond Blame Toward Understanding

One of the most common questions we hear, from the people we work with, from their families, and from professionals, is why. Why did this develop? What caused it? And, often unspoken: was it something I did?

These are natural questions. But the honest clinical answer is that eating disorders do not have a single cause. They develop through a combination of biological, psychological, and social factors that interact differently for every individual. Understanding this matters – not as an academic exercise, but because it directly shapes how we think about treatment and, crucially, how we think about blame.

Why There Is No Single Cause

Eating disorders are complex mental health conditions. They do not develop because of one event, one gene, one personality trait, or one comment about weight. Clinically, we understand them as arising from a combination of vulnerability factors (what makes someone more susceptible), triggering events (what sets the process in motion), and maintaining mechanisms (what keeps the eating disorder going once it has developed).

This distinction matters. Much of the public conversation focuses on causes, what started it, when clinically, what keeps an eating disorder going is often more relevant to recovery than what triggered it in the first place.

Biological Contributing Factors

Research consistently shows that eating disorders have a significant biological component. Twin studies indicate that genetic factors account for between 40% and 60% of the risk for anorexia nervosa, with similar heritability estimates for bulimia nervosa and binge eating disorder.

This does not mean there is a single “eating disorder gene.” Rather, genetics influence traits that increase vulnerability – temperament, sensitivity to reward, perfectionism, and the way the brain processes hunger and fullness signals (known clinically as interoceptive awareness). Neurotransmitter systems involved in mood regulation, anxiety, and impulse control also play a role.

Put simply: some people are biologically more vulnerable to developing an eating disorder than others, in the same way that some people are more vulnerable to anxiety or depression. This is not a choice, and it is not within anyone’s control.

Psychological Vulnerability and Maintaining Factors

Certain psychological characteristics are consistently associated with eating disorders. These include perfectionism, low self-esteem, difficulty managing intense emotions, a strong need for control, and body image difficulties that go beyond ordinary dissatisfaction with appearance.

For many people, the eating disorder comes to serve a function. It can become a way to manage overwhelming emotions, create a sense of control when other areas of life feel unpredictable, or provide a sense of identity or achievement. This is one of the reasons eating disorders are notoriously difficult to treat – they are not simply unhelpful habits that can be stopped through willpower. They are meeting a need, however harmful the method.

Understanding these maintaining mechanisms – what the eating disorder does for someone, not just what it does to them – is central to effective treatment. Approaches such as CBT-E, MANTRA, and Schema Therapy are designed to address these patterns directly: helping people develop alternative ways to meet the emotional needs the eating disorder has been fulfilling.

Social and Cultural Influences

We live in a culture that places enormous value on appearance, thinness, and control over the body. Social media, diet culture, and the fitness industry create an environment where disordered relationships with food and body image are normalised – and sometimes actively encouraged.

However, it is important to be precise. Social and cultural pressures do not cause eating disorders on their own. If they did, everyone exposed to those pressures would develop one – and they do not. What cultural factors can do is act as triggers for people who are already vulnerable, and they can reinforce and maintain disordered behaviours once they have begun.

Comments about weight or eating, bullying, competitive sporting environments, and academic pressure can all function as triggering events. But they trigger something in people who were already predisposed – through the biological and psychological factors described above.

For Parents: You Are Part of the Solution, Not the Cause

If you are a parent reading this, the chances are you are carrying some version of the question: did I cause this?

The evidence is clear: parents do not cause eating disorders. The outdated idea that family dynamics are the root cause has been thoroughly challenged by decades of research. Eating disorders arise from the interaction of genetic vulnerability, psychological factors, and environmental triggers – not from parenting.

What the research does show is that families are one of the most powerful resources in recovery. Family-Based Treatment (FBT), which positions parents as active partners in their child’s treatment, is one of the most effective approaches for children and adolescents with eating disorders. Far from being the cause, parents are often the most important part of the solution.

If you are supporting a child or young person with an eating disorder, specialist support for parents and carers can help you understand the condition, develop confidence in how to respond, and look after your own wellbeing in what is an understandably difficult time.

From Understanding Why to Focusing on What Helps

It is natural to want to understand why an eating disorder developed. But in clinical practice, the question that leads to the most progress is often not why did this start? but what is keeping it going, and what can we do about it?

Evidence-based treatments focus on identifying and addressing maintaining mechanisms – the thoughts, behaviours, and emotional patterns that keep the eating disorder in place. A specialist eating disorder assessment is the starting point for understanding how these factors interact for each individual, and for building a personalised treatment plan.

At The London Centre, we take a multidisciplinary approach to treatment, bringing together psychologists, psychiatrists, dietitians, occupational therapists, and family therapists to address the full picture – not just the eating behaviours, but the emotional, relational, and practical factors that surround them.

What to Do Next

If you are struggling with your relationship with food, or if you are worried about someone you care about, understanding that eating disorders are complex and multi-factorial is an important first step. It means that what you or your loved one is dealing with is not a failure of character, willpower, or parenting. It is a recognised condition that responds to specialist treatment.

Taking the next step – whether that is seeking an assessment, learning more about what treatment involves, or simply having a conversation with a specialist team – can feel daunting. But it is also the point at which things can begin to change. Whatever stage you are at, we are here to listen and to guide you toward the right support.