Feeling trapped in a never-ending battle with depression, especially when medications fail, can be utterly devastating. But what if the key to relief isn’t in a pill, but in your pantry? A groundbreaking study published in JAMA Psychiatry (https://jamanetwork.com/journals/jamapsychiatry/fullarticle/10.1001/jamapsychiatry.2025.4431?guestAccessKey=e6fe693e-1d13-4bf1-b7d6-5307dca28d0b&utmsource=forthemedia&utmmedium=referral&utmcampaign=ftmlinks&utmcontent=tfl&utmterm=020426) suggests that a controversial diet—the ketogenic diet—might offer hope for those with treatment-resistant depression. And here’s the kicker: improvements could start showing up in as little as six weeks.
For the estimated 30% of Americans with Major Depressive Disorder who don’t respond to standard treatments (https://pmc.ncbi.nlm.nih.gov/articles/PMC10503923/), this could be a game-changer. Imagine finding relief not from a prescription, but from a plate of food.
The ketogenic diet, often abbreviated as keto, is a high-fat, moderate-protein, low-carbohydrate eating plan designed to shift your body into a state called ketosis. In ketosis, your body burns fat for energy instead of glucose, producing molecules called ketones. These ketones aren’t just fuel for your muscles—they’re also an alternative energy source for your brain.
But here’s where it gets controversial: While keto is famous for its weight-loss benefits, its potential impact on mental health is far less understood. Scientists have long speculated that ketones could benefit the brain by providing a steadier energy supply, regulating mood-related neurotransmitters like serotonin, reducing inflammation, and even improving gut health—all factors closely tied to depression (https://nypost.com/2022/06/14/ketogenic-diet-may-increase-lifespan-new-study/, https://nypost.com/2025/12/23/health/can-psychobiotics-help-with-depression-stress-and-anxiety/).
To test this theory, researchers recruited 88 adults aged 18 to 65 with treatment-resistant depression, all scoring at least 15 on the 9-item Patient Health Questionnaire (PHQ-9), a widely used depression screening tool. These participants were split into two groups. The first group dove headfirst into keto, consuming three prepared meals and snacks daily while monitoring their ketone levels with urine test strips. The second group followed a “phytochemical” diet, incorporating a variety of colorful fruits and vegetables while swapping saturated animal fats for unsaturated plant oils.
After six weeks, both groups showed improvements, but the keto group outpaced the phytochemical group. Depression scores dropped by an average of 10.5 points in the keto group compared to 8.3 points in the phytochemical group. Urine tests confirmed that most keto participants maintained ketosis during the study.
And this is the part most people miss: Despite the promising results, sticking to the keto diet proved challenging. Once the prepared meals and weekly support ended, only 9% of participants continued the diet. Dr. Raphael Braga, a physician at Northwell Health’s Zucker Hillside Hospital who was not involved in the study, noted, ‘The ketogenic diet might have value when well executed, but it’s a very demanding approach. It’s highly restrictive.’
Why keto might help severe depression isn’t entirely clear, but metabolism appears to play a significant role (https://nypost.com/2025/06/05/health/science-confirms-your-diet-could-be-making-you-depressed/). Research suggests ketones may address underlying metabolic issues linked to depression, such as insulin resistance and mitochondrial dysfunction, by fueling brain cells more efficiently (https://pmc.ncbi.nlm.nih.gov/articles/PMC11182043/).
However, food might not be the only factor. Dr. Braga pointed out that the structured support participants received—prepared meals, regular check-ins, progress tracking, and counseling—likely contributed to their improvement. ‘Those elements are crucial, especially for severe depression,’ he explained. ‘The more we can help patients engage socially and maintain routines, the better.’
Keto is best known as a weight-loss tool, popularized by athletes, bodybuilders, and celebrities like Halle Berry (https://www.womenshealthmag.com/weight-loss/a22000172/halle-berry-keto-diet/) and Kourtney Kardashian (https://www.womenshealthmag.com/weight-loss/a28209893/kourtney-kardashian-keto-diet-meal-plan/). But it’s not without drawbacks. Some studies have linked keto to poorer overall diet quality and increased LDL cholesterol levels (https://nypost.com/2023/03/01/why-keto-and-paleo-diets-are-the-worst-popular-weight-loss-fads-study/). One 12-week study found participants had higher cholesterol, elevated apolipoprotein B (a contributor to artery-clogging plaque), and reduced levels of Bifidobacteria, beneficial gut bacteria that aid digestion and immunity (https://nypost.com/2024/08/05/health/keto-diet-reduces-friendly-gut-bacteria-and-raises-cholesterol-levels-study/).
Dr. Braga emphasizes that other lifestyle changes, such as weight management, exercise, and routine management, can also significantly impact treatment-resistant depression. ‘If a patient is taking care of their health, losing weight, or maintaining a healthy weight, that alone can be a major gain,’ he said.
So, is keto the next big thing in depression treatment, or just another fad? The study’s results are intriguing, but the diet’s challenges and potential risks can’t be ignored. What do you think? Would you consider trying keto for mental health, or do its downsides outweigh the potential benefits? Let’s start a conversation in the comments!
