The Tim Ferriss Show

How to Use Ketosis for Enhanced Mood, Cognition, and Brain Protection

The Tim Ferriss Show with Dr. Dominic D'Agostino 2026-01-07

Summary

Dr. Dominic D'Agostino provides a practical guide on using ketosis for mental performance and neuroprotection. Covers how ketones elevate GABA, quiet the mind, and support metabolic psychiatry. Tim shares how ketosis reversed his pseudo-dementia symptoms from Lyme disease in just 3-4 days.

Key Points

  • Ketosis benefits include quieting the mind and elevating GABA
  • Metabolic psychiatry uses ketones to address mental health conditions
  • Tim's Lyme disease-induced pseudo-dementia reversed in 3-4 days of ketosis
  • Spirochetes (Lyme bacteria) are glycolytic—ketosis may starve them
  • Practical protocols for achieving and maintaining ketosis
  • Long-term brain protection through metabolic flexibility

Key Moments

Ketosis quiets the brain: lowers glutamate, elevates GABA across seizure types

Ketosis silences seizures across all etiologies by lowering glutamate and elevating GABA.

"The ketogenic diet just quiets the brain, lowers glutamate, and elevates GABA independent of the etiology."

Ketosis stimulates adaptive immune response: relevant for Lyme, shingles, herpes

Beta-hydroxybutyrate in the blood stimulates the adaptive immune response, the body's targeted defense system.

"I'm just lucky that I had the prior experience with the ketogenic diet to even have it occur to me as a last-ditch effort."

Keto slows cancer but isn't a cure: 80% of cancers are highly glycolytic

Keto slows cancer growth in the 80% of cancers that are glycolytic and enhances response to standard therapies.

"People who've been on dozens of medications who go into remission after being treated on a ketogenic diet. It is astonishing."

Intermittent fasting made keto transition effortless: no fog, no low energy

Ferriss found that months of intermittent fasting beforehand made his keto transition the easiest ever -- zero fogginess, low energy, or irritability.

"It was the easiest transition I've ever had. I did not have any fogginess. I did not have low energy."
Ketogenic Diet

Tim's keto-friendly cholesterol management: Repatha + ezetimibe for hyperabsorbers

Ferriss is a cholesterol hyperabsorber using Repatha and ezetimibe.

"One to two millimolar seems to be the sweet spot for metabolic management and general metabolic health."
Ketogenic Diet

Prescription keto foods coming: gourmet meals hitting modified ketogenic macros

A company called MediFoods is creating gourmet prescription whole foods that hit modified ketogenic diet macros.

"And I've for years, I was kind of, there's no whole food-based ketogenic diet prescription foods. So I have no association with the company."

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