Nick NorwitzMD PhD, Oxford-Harvard | Metabolic Health Educator | “Stay Curious”

A Ketogenic Diet Can Fight Depression?

16 Oct 2025 · 1 min

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0:53

In this YouTube commentary, the speaker summarizes a recent Translational Psychiatry study that reported dramatic reductions (69‑71%) in depressive symptoms among college students following a 12‑week ketogenic diet, as measured by the Hamilton Depression Rating Scale and the PHQ‑9. The speaker outlines three hypothesized mechanisms for the mental‑health benefits—enhanced brain energy metabolism, decreased neuroinflammation, and gut‑microbiome alterations that generate antidepressant compounds. While emphasizing the impressive magnitude of the findings, the speaker also notes the study’s limitations and cautions that the results are not definitive, framing the ketogenic diet as a potentially powerful metabolic intervention rather than a mere fad.

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A brand new study in Translational Psychiatry found that a ketogenic diet can be highly effective in treating depression. Among college students, depressive symptoms were improved by 69-71% over just 12 weeks by a ketogenic diet, depending on what scale was used, the Hamilton Depression Rating Scale or the PHQ-9, but the results were consistent, massive improvements in depression affecting every single participant. That raises the question, how does a ketogenic diet improve mental health? Well, several ways: by enhancing brain energy metabolism, by reducing neuroinflammation, and even by reshaping the gut microbiome to produce antidepressant compounds. The punchline is not that this was a perfect study, or that it's the be-all end-all, the final word. It's that what many dismiss as a fad diet is, in reality, a powerful metabolic health intervention that can save lives.