What is anorexia nervosa?

“Anorexia nervosa is an eating disorder characterized by weight loss (or lack of appropriate weight gain in growing children); difficulties maintaining an appropriate body weight for height, age, and stature; and, in many individuals, distorted body image.”

National Eating Disorders Association

How common is it?

NEDA currently puts the one-year prevalence of anorexia nervosa at 0.16% for females and 0.09% for males.

Why this section is shorter than it was

The March 2023 version of this page carried four statistics, all credited to NEDA. None of them appears on NEDA's page today — and none of them appears in the archived copy of that page from March 2023 either, which is when this issue was written. We could not establish where they came from, so they are gone rather than repeated. The single figure above is the one NEDA publishes now.

Watch: What is anorexia? — Erin Parks of Equip on the symptoms and how to recognize them.

In their words

How my recovery started with just 20 minutes

By R. Lane

“What I was really good at, what I was meant to do, was to control. The thing that I was the best at controlling was what food I put into my body and how much of it I chose to consume and when.”

Read the article (To Write Love on Her Arms)

The next right thing

By Britt Bajier

“I sometimes may not be able to see tomorrow or may tend to think I have no future at all. But in those moments, that's when I remember I have the power to choose the next right thing.”

Read the article (To Write Love on Her Arms)

How running helped heal my eating disorder

By Sonnet Alyse Medrano

“Amidst all the things I couldn't control, there before me was something I could: my weight. When I compared myself to women in magazines and movies, I wasn't enough.”

Read the article (To Write Love on Her Arms)

From our own pages

Three lines the March 2023 issue published as image cards. They are set as text here. A sentence rendered into a picture is invisible to anyone using a screen reader, cannot be enlarged without blurring, cannot be selected, copied or translated, and does not survive being quoted — and these are lines someone might want to keep. The cards themselves are not republished, because once the words are text the picture adds nothing but a second copy of them.

“My dietitian, my therapist, my friends, all tell me there is nothing wrong with being full. I'm not bad if I'm full.”

“Recovery starts with vulnerability. It starts with honesty. It starts with showing up.”

“Each step forward is enough.”

What happens to the brain

During acute anorexia, gray matter volume is reduced compared with people of the same age who do not have it. It increases again with weight recovery. A 2025 systematic review of thirteen studies found an important difference by age: in adolescents, gray matter volumes normalized after weight recovery; in adults who had recovered, they generally remained smaller than in comparison groups. White matter volume was largely unaffected in either phase.

That is a real argument for treating anorexia early, and it is the strongest thing this section can say.

How does treatment help?

As Cleveland Clinic puts it, the biggest challenge in treating anorexia is helping someone recognize and accept that they are ill. Many people with anorexia do not believe they have an eating disorder, and often reach medical care only when their condition is already serious. That is why catching it early matters so much.

Treatment usually combines several things at once: restoring weight and nutrition, stopping the eating patterns that maintain the illness, and therapy addressing the thinking underneath it — distorted body image, low self-esteem, the sense that control over eating is the one thing available. Anorexia also very often occurs alongside other conditions, particularly depression and OCD, and treatment usually has to address those too.

Books that portray anorexia

Wintergirls, by Laurie Halse Anderson

Two friends, an eating disorder, and what one owes the other.

Group, by Christie Tate

A memoir of group therapy and what it took to be seen in it.

Content note: both deal directly with eating disorders and self-harm. Does the Dog Die is useful for checking a book before starting it.

A note from the team

We are not experts and do not seek to diagnose or act in place of professional psychiatric treatment. We are an organization seeking to raise awareness. If you have concerns about any of this material, please email us.

Sources

  1. National Eating Disorders Association — Anorexia nervosa (the definition — confirmed to contain it word for word, September 2026)
  2. National Eating Disorders Association — Eating disorder statistics (the prevalence figure)
  3. Leverett S. D. et al. (2025) — Effects of anorexia nervosa on structural morphometry of the brain in adolescents and adults after weight recovery: a systematic review, Psychiatry Research: Neuroimaging (the brain section)
  4. Cleveland Clinic — Anorexia nervosa (the treatment section)

Sources were last checked September 2026. Every source links to the exact document cited, never a homepage.