Energy balance
Ketogenic dietary therapies (KDTs) may improve cerebrovascular health and neuroprotection by shifting brain energy metabolism from glucose to ketone bodies (specifically β-hydroxybutyrate), reducing oxidative stress, and modulating inflammatory signaling, though current human evidence is limited and heterogeneous.
If you have cognitive concerns or are aging, a ketogenic diet might offer neuroprotective benefits by shifting your brain's fuel source to ketones, which may reduce inflammation and oxidative stress. However, current human evidence is not strong enough to recommend it broadly. If you try it, consider less restrictive versions like the Modified Atkins Diet for better long-term adherence, and be aware that benefits may take weeks to manifest as your body adapts (keto-adaptation).
Available evidence indicates that ketogenic dietary interventions may modulate several biological pathways relevant to brain health, including cerebral energy metabolism, mitochondrial function, oxidative stress regulation, and inflammatory signaling. However, the current evidence base is dominated by preclinical studies and short-term human investigations, and direct evidence linking ketogenic dietary therapies to long-term cerebrovascular or cognitive outcomes remains limited.
Why this rating
The paper explicitly states evidence is dominated by preclinical studies and short-term human trials with small sample sizes.
Source
Ketogenic Diet and Brain Health: Cerebrovascular Mechanisms, Neuroprotection, and Translational Implications
Noémi Mózes et al. · Nutrients · 2026
DOI 10.3390/nu18071091
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