The Tim Ferriss Show

#825: Dr. Dominic D’Agostino — All Things Ketones, How to Protect the Brain and Boost Cognition, Sardine Fasting, Diet Rules, Revisiting Metformin and Melatonin, and More

317 snips
Sep 3, 2025
Dr. Dominic D’Agostino, an associate professor with a focus on nutritional strategies for neurological health, dives into fascinating topics like the benefits of ketones for cognitive function and Alzheimer's prevention. He shares insights on sardine fasting's surprising health benefits and the connection between immune system health and longevity. Additionally, they explore the significance of metabolic measurements and dietary strategies that support brain health, revealing practical tips for enhancing cognitive performance and managing overall wellness.
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Ketones Are Signaling Molecules

  • Beta-hydroxybutyrate (BHB) acts as more than fuel and inhibits HDACs to activate antioxidant and cellular defense genes.
  • Ketones also suppress inflammasomes independent of their role as energy substrates.
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Steve Newport's Ketone Response

  • Steve Newport, an APOE3-4 Alzheimer's patient, got temporary cognitive and motor improvements from MCT/coconut oil before switching to ketone esters.
  • His tremors stopped and he became animated for hours after raising ketone levels to ~1–2 mM.
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Measure Ketones And GKI At Home

  • Use a reliable meter like Keto-Mojo for home ketone and glucose monitoring because it calculates GKI and aligns well with lab assays.
  • Track glucose, ketones and compute GKI to target therapeutic ranges (e.g., GKI 1–5, optimal ~1–2).
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