A recent exploratory study has found that a ketogenic diet may dramatically alleviate symptoms of major depressive disorder (MDD) in young adults. According to the study, participants experienced a 70% drop in depression symptoms after adhering to a low-carb, high-fat diet for several weeks.

In addition to improved mood, those involved in the study reported cognitive benefits, enhanced overall wellness, and modest weight loss. Researchers suggest that entering a state of nutritional ketosis may offer promise as a supplementary therapy when combined with medication and counseling. However, experts caution that keto is not a replacement for professional mental health treatment and emphasize the need for larger, controlled trials.

Promising Findings from Ohio State Pilot Study

Conducted by researchers at Ohio State University, the small-scale trial followed 16 college students diagnosed with major depressive disorder over a 10 to 12-week period. All participants were already undergoing treatment—either medication, therapy, or both—prior to starting the ketogenic diet.

By the end of the study, depression scores among the participants had fallen by roughly 70%. Alongside this notable mood improvement, participants reported better cognitive function, enhanced feelings of well-being, and a slight reduction in body weight.

These results indicate that achieving nutritional ketosis through dietary changes may be a practical way to support traditional mental health treatments. The full findings were published on September 10 in Translational Psychiatry.

For comparison, standard treatment with medication and talk therapy typically yields about a 50% improvement in symptoms over a similar timeframe, according to earlier research.

“This level of improvement is quite remarkable, especially considering the added benefits like improved cognition and mood,” said Shelly Dar, a therapist who specializes in mood and anxiety disorders. Though not involved in the research, she expressed cautious optimism. “That said, it’s important to note this was a small pilot study without a control group. We can’t definitively say the keto diet caused these improvements.”

How Ketosis May Enhance Brain Health

The ketogenic diet has long been recognized for its effectiveness in managing neurological conditions like epilepsy. Its potential for supporting brain health and emotional regulation is now gaining more scientific attention.

During ketosis, the brain transitions from using glucose as its main energy source to relying on ketones. According to Mike Kocsis, founder of Balance My Hormones in the UK, who was not part of the study, this metabolic shift may play a crucial role in mental health.

“Ketones act as signaling molecules that influence brain chemistry,” Kocsis explained. “They may enhance mitochondrial function, reduce inflammation, and stabilize blood sugar—all of which are linked to emotional regulation.”

He also noted that ketones might promote the function of GABA, a calming neurotransmitter associated with reduced anxiety and better mood balance.

“The participants in this study not only reported fewer depressive symptoms, but also showed improved cognitive performance,” Kocsis added. “That indicates better overall brain function.”

Potential Benefits for Broader Mental Health Issues

Emerging research suggests that the ketogenic diet may positively impact a range of mental and neurological disorders. Preliminary studies have begun exploring keto’s role in managing conditions such as:

• Schizophrenia

• Attention-deficit/hyperactivity disorder (ADHD)

• Bipolar disorder

• Parkinson’s disease

• Alzheimer’s disease

In one small 2024 trial involving three adults, researchers observed complete remission of both major depressive disorder and generalized anxiety disorder (GAD) within 7–12 weeks of following a ketogenic protocol. However, such findings remain preliminary and require confirmation through larger clinical studies.

Not a Replacement for Mental Health Care

While the recent Ohio State study offers hopeful insights, experts caution against viewing the ketogenic diet as a stand-alone solution for depression.

Dar emphasized that although the results are encouraging, they do not offer conclusive proof. “We need more robust research before suggesting keto as a primary treatment,” she said. “But for clients seeking practical, self-directed tools to feel better, these findings could be very motivating.”

Importantly, all study participants continued their prescribed medications and counseling while on the diet. “That’s the right model—adding the diet to existing treatment, not replacing it,” she said. “We don’t want anyone stopping antidepressants or therapy in favor of a restrictive eating plan.”

Dar also warned that the keto diet might not be suitable for everyone. “It can be socially isolating, difficult to maintain, and risky for individuals with a history of disordered eating,” she explained. “For some, a highly restrictive diet can be empowering. But for others, it could trigger harmful habits.”

Kocsis agreed: “Nutritional strategies like keto should complement, not replace, established treatments.”

Taking Steps Toward Depression Recovery

If you’re experiencing symptoms of depression, it’s essential to seek guidance from a healthcare provider or licensed mental health professional.

In many cases, treatment may include therapy, medications like SSRIs, or a combination of both. If a healthcare professional recommends a ketogenic diet as part of a broader treatment plan, Kocsis advised easing into it gradually. “Start reducing carbs slowly over a week or two to minimize side effects like fatigue and headaches, commonly known as ‘keto flu,’” he said.

He also recommended focusing on whole foods, non-starchy vegetables, healthy fats like avocados and olive oil, and high-quality proteins to prevent nutritional deficiencies.

Dar noted that less restrictive eating styles—such as the Mediterranean diet—can also support emotional health. “What really matters is building a long-term routine that promotes well-being without creating additional stress,” she said.

She added that beyond diet, lifestyle habits like adequate sleep, regular physical activity, meaningful social connections, and reducing alcohol or substance use are crucial for emotional resilience.

“These are powerful tools for managing mood,” Dar emphasized. “Small, consistent changes—like establishing a daily routine or improving sleep—can be just as effective as more dramatic interventions.”