Neuroscientist Reveals Diet that Doubles Autophagy More than Fasting

Dom describes that to achieve a glucose-ketone index (low glucose, high ketones) comparable to a 72-hour fast, you need to hold an energy deficit and low insulin for 3-5 days. He uses a 500-kcal daily intake, emphasizing high nutrient density: he consumes sardines or mackerel (canned) for omega-3s which are anti-catabolic and anti-inflammatory, along with maybe broccoli. Protein is kept moderate to restrict mTOR but supply essential amino acids to spare skeletal muscle. By not completely fasting, he finds it easier psychologically and avoids the 'off the rails' rebound eating. The protocol also incorporates brisk walking 1-2 hours to further deepen the calorie deficit, potentially exceeding the deficit of pure fasting. After finishing, he returns to maintenance calories, but remains more vigilant with macronutrients for the following week to maintain benefits. He's seen through DEXA that this protocol doesn't cause muscle loss if protein is included and training is light.

Dom notes that even a little bit of exercise goes a long way in inducing autophagy. Walking for an hour or two could burn off the 500 calories consumed, creating a theoretical energy deficit larger than total fasting. He also does some sprints, pull-ups, push-ups, but warns against heavy deadlifts or squats when protein synthesis is low, as recovery is compromised. He previously deadlifted heavy after a 7-day fast and found strength intact but recovery suffered, and his testosterone halved. So he keeps intensity moderate. The host mentions G flux and coupling activity with intake, and Dom agrees this is intuitive and should be studied.

Dom shared that during his 5-day fasts, a 1 mg lozenge curbs hunger pangs and provides a motivational buzz. He finds the slow dissolve crucial — the gradual entry avoids the dependency seen with inhaled nicotine. He took a month off without craving, confirming no addiction. He believes that the metabolic cost-benefit can favor a small amount of nicotine if it helps shed inflammatory adipose tissue, but emphasizes caution.

Dom explains that the typical 72-hour fast achieves a glucose-ketone index (low glucose, high ketones) that correlates with autophagy markers, but going beyond 3-5 days leads to diminishing returns for body composition and endocrine disruption. He now employs a 'modified ketogenic diet' idea: consume 500 calories per day from nutrient-dense foods like sardines, mackerel, egg yolks, and broccoli, split into two 250-calorie meals. The carbohydrate restriction suppresses insulin, lowering blood glucose and raising ketones (therapeutic ketosis). He holds this state for 3-5 days. In his experience, this achieves autophagy without the intense deprivation of zero calories, and he feels higher energy and less post-fast rebound. He does this once every 2-3 months, aiming to make it monthly. He cites Valter Longo's fasting-mimicking diet but says this version is more practical with real food and lower protein to avoid mTOR activation while getting essential amino acids to spare muscle. The protocol also allows light exercise (walking, some sprints, push-ups) to further amplify autophagy and create a larger energy deficit without heavy lifting.

Dom details that during his 5-day calorie restriction, he reserves low-dose nicotine (1-2 mg lozenges) for moments of craving or low energy. The lozenges dissolve over 30-60 minutes, providing a gradual trickle of nicotine that avoids the sharp spike responsible for addiction. He uses it intermittently — maybe a couple times a day during the fast, never exceeding 4 mg total, and often takes a month or more off without cravings. He acknowledges that it stimulates norepinephrine and can act as a fat burner; he also uses 1 mg before long runs for an energy boost. He stresses that the rate of entry into circulation dictates dependence: slow lozenges are much less addictive. He has tested his blood work and found no increase in blood pressure or insulin resistance, and his insulin stays at the low end of normal. However, he does not formally recommend it, only shares his n=1.

Dom explains that eating food places mechanical, enzymatic, and metabolic stress on the gut. Caloric restriction reduces that stress, allowing the gut's barrier function to strengthen and perhaps increase mucus-producing Akkermansia. He notes that many people with herpes, shingles, or other latent infections report that fasting prevents full outbreaks. The virus often initially causes gut symptoms (diarrhea, cramps) before systemic inflammation, suggesting a permeability link. The same tight junctions in the gut are present at the blood-brain barrier, so gut leakiness can contribute to neuroinflammation. This concept ties into psychiatric disorders and even Alzheimer's, where infections like Borrelia and HSV are found in the brain. He brings up the viral hypothesis of schizophrenia and the emerging field of metabolic psychiatry, where ketosis is being studied for bipolar, depression, and schizophrenia.