Roughly one person dies every 52 minutes as a direct result of an eating disorder in the United States, and anorexia nervosa accounts for a disproportionate share of those deaths. The rate works out to about 5.1 deaths per 1,000 person-years among people with anorexia, making it the psychiatric illness with the highest mortality rate after opioid addiction. People with a history of anorexia are more than four times as likely to die during any given period compared to people of the same age and sex in the general population.
How Anorexia Compares to Other Eating Disorders
Not all eating disorders carry the same level of danger. A long-term study published in the American Journal of Psychiatry tracked patients over many years and found that 6.5% of those with a lifetime history of anorexia died during the study period. The standardized mortality ratio for anorexia was 4.37, meaning these individuals died at more than four times the expected rate. Bulimia nervosa, by comparison, had a standardized mortality ratio of 2.33, still elevated but roughly half the risk of anorexia.
The gap exists largely because anorexia involves sustained, severe malnutrition that damages nearly every organ system. Bulimia and binge eating disorder carry their own serious health risks, but the degree of starvation in anorexia creates uniquely dangerous conditions in the heart, liver, and brain.
What People Actually Die From
Anorexia kills through a chain of organ damage, not a single cause. A study of 35 patients with severe anorexia who died found that 80% had a comorbid medical disease listed as a cause of death, and many had more than one failing system at the time.
The breakdown of medical causes tells a sobering story:
- Cardiovascular causes accounted for about 26% of deaths. Congestive heart failure and dangerous heart rhythms made up more than half of these. The heart muscle literally weakens and shrinks during prolonged starvation, and electrolyte imbalances can trigger fatal arrhythmias.
- Metabolic causes contributed to about 29% of deaths. Dangerously low blood sugar and low potassium were each responsible for 40% of these metabolic deaths. Potassium drops are especially dangerous because they can stop the heart without warning.
- Infections played a role in about 29% of deaths, with pneumonia accounting for 60% of those. Malnutrition cripples the immune system, leaving the body unable to fight infections that a healthy person would clear easily.
- Gastrointestinal causes made up about 23% of deaths, with liver cirrhosis responsible for half. Years of malnutrition and purging behaviors can destroy the liver.
- Pulmonary causes contributed to about 14% of deaths, predominantly from blood clots in the lungs.
Suicide is also a significant contributor to anorexia deaths, though exact percentages vary across studies. The combination of severe depression, social isolation, and the cognitive effects of starvation places people with anorexia at substantially elevated risk.
Who Faces the Highest Risk
Anorexia affects people of all ages and genders, but the mortality risk is not evenly distributed. Men make up roughly 9% of anorexia patients, yet they experience significantly more cardiac arrests, arrhythmias, and heart failure than women with the same diagnosis. This may reflect delays in diagnosis, since anorexia in men is often recognized later, or biological differences in how male hearts respond to starvation.
Cardiovascular complications occur in up to 80% of all anorexia patients regardless of gender. The heart is one of the first organs affected by sustained calorie restriction, and cardiac problems account for up to 30% of all anorexia-related deaths.
Long-Term Survival After Diagnosis
The picture is not entirely grim, especially for people who receive treatment. A population-based study from the Mayo Clinic followed 208 people diagnosed with anorexia over periods as long as 63 years, with a median follow-up of 22 years per patient. Estimated survival 30 years after diagnosis was 93%, compared to an expected 94% in the general population. That gap is smaller than many people assume, and it suggests that a significant majority of people diagnosed with anorexia do survive long term.
This particular study drew from a community sample rather than a specialty clinic, meaning it included milder cases alongside severe ones. For people with the most severe forms of anorexia, particularly those requiring repeated hospitalization, the mortality risk is considerably higher than these numbers suggest. Duration of illness matters enormously: the longer someone remains in an active state of malnutrition, the more cumulative damage their organs sustain and the harder recovery becomes.
Early treatment is the single biggest factor in long-term survival. Adolescents who receive family-based treatment within the first few years of illness have recovery rates far higher than adults who have lived with anorexia for a decade or more. The body has a remarkable capacity to heal from malnutrition, but that capacity diminishes with time.