Ketogenic Diet for Anorexia Recovery: New UCSD Research
For decades, treatment for anorexia nervosa (AN) has centered on one goal: weight restoration. And for good reason — restoring weight is often lifesaving. But many people in recovery describe something deeply frustrating: even after their bodies are weight-restored or close enough to be discharged from a residential treatment program, the relentless thoughts about food, body image, and weight don't fully go away. Anxiety around eating, fear of weight gain, and obsessive thinking can persist for years, which is part of why relapse rates in AN remain so high.
This raises a question that's gaining serious traction in psychiatric research: what if some of the core symptoms of anorexia aren't just psychological — what if they're also about how the brain is fueled?
What Is Nutritional Ketosis (and Why It's Not Starvation)
The ketogenic diet — high fat, adequate protein, low carbohydrate — has been used for more than 100 years, most famously as a treatment for drug-resistant epilepsy. In recent years, researchers have started examining it through a new lens: brain energy metabolism and mental health.
When someone follows a ketogenic diet, their body shifts from using glucose (derived from carbohydrates) as its primary fuel to using ketones, molecules produced from dietary fat. This metabolic state — nutritional ketosis — is fundamentally different from starvation. A person can be in ketosis while eating adequate calories and maintaining a stable weight.
Why does this matter for anorexia? Early research suggests ketones may:
Improve mitochondrial function
Reduce oxidative stress
Decrease neuroinflammation
Influence neurotransmitters tied to mood, anxiety, reward, and motivation
Many of the same systems are thought to be disrupted in anorexia nervosa. The theory: for some individuals, a brain running on ketones may function differently than one running on glucose — potentially loosening the grip of obsessive eating-disorder thoughts, even while body weight stays the same.
This isn't a cure for everyone, and it doesn't mean every case of AN shares the same biology. But it offers a possible explanation for something many people in recovery have described anecdotally for years.
The 2026 UCSD Trial: What Researchers Actually Found
Until recently, the evidence for ketogenic therapy in anorexia consisted mostly of case reports and individual stories. That changed in June 2026, when Dr. Guido Frank and colleagues at UC San Diego published Symptom impact and safety of ketogenic therapy in adults with anorexia nervosa: a feasibility trial in Communications Medicine — the first prospective clinical trial of its kind.
The Setup
22 adults with AN, either weight-restored or only mildly underweight (BMI above 17.5)
A 14-week, medically supervised ketogenic therapy program
Support from clinicians, a dietitian, and a peer counselor
Designed explicitly to maintain weight — not promote weight loss
The Results
18 of 22 participants completed the study, supporting feasibility
Significant reductions in dietary restraint, concerns about eating, body shape, and weight
Significant reductions in depression symptoms
By the end of the trial, 72% of participants had eating-disorder and depression scores within the normal range
No evidence of clinically significant weight loss or symptom worsening
In short: participants got measurably better.
Why This Study Matters
Anorexia nervosa has one of the highest mortality rates of any psychiatric illness, yet treatment options have remained limited — particularly when it comes to addressing the biology underlying the behavior.
As Dr. Frank explains it, anorexia involves two intertwined problems: dangerous physical weight loss, and deeply ingrained cognitive distortions that fuel restriction and anxiety. Stress may impair glucose metabolism in the brains of vulnerable individuals, potentially driving restrictive behavior — while ketones may help stabilize brain energy and ease anxiety.
"We urgently need new approaches to anorexia nervosa. Our work with ketogenic therapy looks beyond standard therapies and potentially at the underlying physiology of the disorder." — Guido Frank, MD, Professor of Psychiatry, UC San Diego
This was a small trial — 22 people, no control group — and it included only adults who were already weight-restored or mildly underweight. Larger, randomized controlled trials are still needed before firm conclusions can be drawn.
Still, the study matters because it:
Demonstrated feasibility and safety in a population many clinicians assumed couldn't tolerate a ketogenic approach
Challenged the assumption that recovery requires focusing exclusively on weight restoration
Provided scientific support for what many people in recovery have reported anecdotally for years
Opened the door to thinking about metabolism — not just behavior — as a treatment target
The Personal Story Behind the Science
This research didn't start in a lab. It started with one person's recovery.
The trial builds on earlier case studies inspired by Caroline Beckwith, who recovered after a fifteen-year struggle with anorexia nervosa by adding ketogenic nutrition and ketamine infusions to her standard care.
For Dr. Barbara Scolnick, a co-author on the new trial, the research represents a decade-long personal journey. "The scientific inquiry that led to this research began in search of answers for my niece, Caroline Beckwith," she said. "Ketogenic therapy — a standard in epilepsy care — was the major catalyst, when combined with other interventions, that allowed Caroline to achieve remission after a 15-year struggle with anorexia nervosa."
Caroline's story is the heartbeat of this research: a reminder that real families and real perseverance are behind the science.
What This Could Mean for Recovery
Ketogenic metabolic therapy is not a universal fix, and it isn't right for everyone. Recovery is highly individual, and nutritional ketosis is one potential tool. For people who continue to struggle even after weight restoration — who feel trapped by anorexic thinking that therapy alone hasn't resolved — this research offers a new, scientifically grounded avenue worth exploring. The AnorExit® program offers guidance and support for those interested in learning more.
Frequently Asked Questions
What is metabolic ketogenic therapy for anorexia nervosa?
It's a supervised nutritional approach that shifts the brain's fuel source from glucose to ketones while maintaining adequate calories and a stable weight. The goal is to reduce eating-disorder thoughts and improve mood — not to promote weight loss.
Is a ketogenic diet the same as starvation for someone with anorexia?
No. Nutritional ketosis can occur while a person eats enough calories and maintains their weight. It is metabolically different from starvation ketosis or diabetic ketoacidosis.
Does ketogenic therapy cause weight loss in people with anorexia?
In the 2026 UCSD feasibility trial, participants maintained stable weight throughout the 14-week program, with no clinically significant weight loss.
What did the 2026 UCSD study find?
Among 22 adults with anorexia nervosa, a 14-week supervised ketogenic therapy program was safe and well tolerated, and led to significant improvements in body image concerns, eating fears, dietary restraint, and depression — with 72% of participants reaching normal-range scores by the end of the study.
Sources
Frank, G.K.W., Scolnick, B., Beckwith, C., Shott, M.E., Kilty, S., Swindle, S., Lutter, M., & Rho, J.M. (2026). Symptom impact and safety of ketogenic therapy in adults with anorexia nervosa: a feasibility trial. Communications Medicine, 6, 315.
Scolnick, B., Zupec-Kania, B., Calabrese, L., Aoki, C., & Hildebrandt, T. (2020). Remission from Chronic Anorexia Nervosa With Ketogenic Diet and Ketamine: Case Report. Frontiers in Psychiatry, 11, 763.
Calabrese, L., Scolnick, B., Zupec-Kania, B., Beckwith, C., Costello, K., & Frank, G.K.W. (2022). Ketogenic diet and ketamine infusion treatment to target chronic persistent eating disorder psychopathology in anorexia nervosa: a pilot study. Eating and Weight Disorders, 27, 3751–3757.
