Episode Summary
Executive Summary: In this episode of The Drive, host Peter Atia interviews neuroscientist Dom D'Agostino about metabolic therapies, focusing on ketogenic diets and exogenous ketones. They discuss nutritional vs. supplemental ketosis, the challenges of transitioning to a ketogenic diet, and the landscape of exogenous ketones including salts, esters, and 1,3-butanediol. The conversation covers applications for epilepsy, cancer (especially glioblastoma), neurodegenerative diseases like Alzheimer's, and cognitive performance. D'Agostino shares insights from his research on hyperbaric oxygen therapy and the potential of ketone supplements for various conditions, emphasizing the importance of formulation and context-dependent use.
Main Topics: Nutritional vs. Supplemental Ketosis (Priority: 5/5): Definitions, thresholds for clinical ketosis (BHB >0.5 mmol/L), and practical ways to achieve it while maintaining adequate protein intake. Exogenous Ketones: Types and Applications (Priority: 5/5): Comparison of ketone salts, esters, and 1,3-butanediol; their taste, insulin effects, and effective pairings with caffeine, MCT, and alpha-GPC. Ketogenic Diets for Cancer and Neurodegenerative Diseases (Priority: 5/5): Metabolic therapy for glioblastoma and prospects for Alzheimer's disease, including the glucose-ketone index and ongoing clinical trials. Hyperbaric Oxygen Therapy (Priority: 4/5): Protocols, practical barriers, and ongoing trials for TBI, PTSD, and cognitive enhancement. Carnivore Diet as a Ketogenic Variant (Priority: 3/5): Implications for autoimmune and metabolic conditions, and its role as an elimination diet. Fasting and Ketones for Situational Use (Priority: 3/5): Benefits for cognition, workload, travel, and inflammation when used strategically.
Key Arguments: Ketogenic diets are the most scientifically researched diet with an objective biomarker (BHB) defining the physiological state. Exogenous ketone salts (e.g., Keto Start) provide a sustained ketone elevation without the insulin spike or GI issues associated with esters. High-protein ketogenic diets (20-30% protein) are more effective for muscle maintenance and satiety than traditional low-protein versions. For cancer, achieving a glucose-ketone index of 1-4 is critical, but this has not been rigorously tested in clinical trials. Hyperbaric oxygen therapy shows promise for TBI and PTSD, but rigorous sham-controlled trials are needed. Ketones are most beneficial in contexts of metabolic stress or deficit, not as a default daily supplement.
Data Points: Clinical ketosis threshold: 0.5 mmol/L - BHB level defining nutritional ketosis Pediatric epilepsy response rate: Two-thirds - Patients with drug-resistant seizures respond to ketogenic diet Adult epilepsy response rate: 30-40% - Post-adolescence patients respond to ketogenic diet Glucose-ketone index target for cancer: 1-4 - Ratio of glucose (mmol/L) to ketones (mmol/L) for metabolic therapy Ketone salt dose for 4-hour elevation: 6-10 grams - Pure BHB in one packet of Keto Start Hyperbaric oxygen protocol for TBI: 2 atmospheres, 60-90 min, 5 days/week, 40 sessions - Recommended by D'Agostino for acute concussion
Pivotal Quotes: "The ketogenic diet is indeed a magical diet in the way that it remarkably changes our physiology. And there's no other diet that exists that can, for example, manage drug-resistant seizures." — Dom D'Agostino: Discussing the unique therapeutic effects of ketogenic diets beyond weight loss "Higher ketones are not advantageous and I think potentially very problematic." — Dom D'Agostino: Warning against excessive ketone levels, which can cause energy toxicity "I use fasting very situationally, and that's what I recommend to people. It shouldn't be your default." — Dom D'Agostino: Advocating for strategic, context-dependent use of fasting and ketones
Implications: This episode provides actionable insights for using ketogenic diets and supplements safely and effectively. It highlights the need for rigorous clinical trials in cancer and neurodegenerative diseases, and suggests that exogenous ketones (especially salts) can be a practical tool for cognitive enhancement and metabolic health without the downsides of strict dietary restriction.
About Peter Attia Drive
Expert insight on health, performance, longevity, critical thinking, and pursuing excellence. Dr. Peter Attia (Stanford/Hopkins/NIH-trained MD) talks with leaders in their fields.