The Study
Critical appraisal of a pilot study examining a ketogenic diet as an adjunct therapy in college students with major depressive disorder
This study watched a small group of college students eat a special diet and noticed they felt better, but it didn't compare them to people who didn't eat the diet. So we can't say the diet caused the improvement—it might have been luck, other help they got, or just feeling better over time.
Analysis score
Maximum 5 for a narrative review.
Where the score came from
A small group of college students with depression tried eating mostly fat and protein for 10–12 weeks and felt much better — their sadness scores dropped a lot, their brain chemicals improved, and they lost some weight.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 52 / 100
Quality score
Systematic reviews and meta-analyses of cohort studies. They sit above a single cohort study but below a single randomized trial, because the underlying evidence is still observational.
Key takeaways
Summary
Based on the study abstract and findings.
- 1These changes are as big as those seen with antidepressant meds, but since everyone knew they were on a diet and there was no comparison group, we can't be sure the diet caused the improvement.
- 2Depression scores dropped by 69–71%, BDNF (a brain-growth chemical) went up 32%, leptin (a hunger hormone) dropped 52%, body weight fell 6.2%, and body fat dropped 13%.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Translational Psychiatry
Year
2026
Authors
Muhammad Khizar, Muhammad Zaib, Hasiba Karimi, Hasibullah Aminpoor
Related Content
Claims (5)
In college students with major depressive disorder, a 10- to 12-week ketogenic diet is associated with a 32% increase in brain-derived neurotrophic factor and a 52% decrease in leptin levels.
In college students with major depressive disorder, following a ketogenic diet for 10 to 12 weeks results in a 6.2% decrease in total body mass and a 13% decrease in body fat percentage.
In a small group of college students with major depressive disorder, a ketogenic diet was followed for 10 to 12 weeks by 16 participants without serious side effects.
Ketogenic diets produce a reduction in depressive symptoms in people with major depressive disorder that is similar in size to the reduction seen with standard antidepressant treatments.
In college students diagnosed with major depressive disorder, following a ketogenic diet for 10 to 12 weeks is associated with a 69–71% decrease in depressive symptoms as measured by standard clinical scales.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.