Scientific rationale
- In experimental models, beta-hydroxybutyrate may influence oxidative stress, mitochondrial function, inflammation, blood-brain barrier biology, and cell survival pathways.
- Clinical translation is complex because stroke subtype, timing, reperfusion therapy, swallowing safety, and rehabilitation needs vary widely.
Research snapshot
- Human work is mostly feasibility or adjacent acute brain injury research, not definitive stroke treatment evidence.
- The most important proven interventions remain emergency recognition, reperfusion where appropriate, secondary prevention, rehabilitation, and nutrition support.
Clinical frame
- Do not attempt fasting or restrictive ketogenic diets during suspected or acute stroke outside a clinical protocol.
- After stroke, nutrition planning should prioritize swallow safety, adequate protein and energy, vascular risk management, and individual comorbidities.
Open questions
- Can ketone interventions be tested safely at the right time window after ischemic or haemorrhagic stroke?
- Which outcomes should matter most: infarct biology, cognition, fatigue, motor recovery, or vascular risk?
Selected evidence
- Ketogenic diet and brain health: cerebrovascular mechanisms, neuroprotection, and translational implications Nutrients, 2026
- Ketogenic diet and ketone bodies against ischemic injury International Journal of Molecular Sciences, 2023
- Beta-hydroxybutyrate improves glymphatic system function and alleviates cerebral edema after ischemic stroke Journal of Neuroinflammation, 2025
- Brain transcriptome, microbiome and metabolome in ketogenic diet and experimental stroke Nutrients, 2024
- Beta-hydroxybutyrate mitigates sensorimotor and cognitive impairments in photothrombosis-induced ischemic stroke Nutrients, 2024
- Inducing ketogenesis via an enteral formulation in acute brain injury Critical Care, 2020