Rhonda Patrick, Ph.D. — Protocols for Fasting, Lowering Dementia Risk, Reversing Heart Aging, & More

Tim Ferriss and Dr. Rhonda Patrick reconnect over a decade after their first conversation to do a wide-ranging deep dive into actionable longevity science. They begin with what Patrick gives her aging parents (multivitamin, omega-3, CoQ10, sulforaphane) given her father's Parkinson's and mother's tremors, then move into intermittent and prolonged fasting, ketosis, autophagy, and muscle preservation. The bulk of the conversation covers exercise for reversing heart and brain aging, including VO2 max, the Norwegian 4x4, and lactate's role in brain health. They close with practical guidance on creatine dosing, vitamin D and its magnesium dependency, sauna protocols, microplastic mitigation, and the unambiguous cancer and dementia risks of alcohol.

• Three two-year randomized controlled trials showed a standard Centrum Silver multivitamin reduced global cognitive aging by about 2 years and episodic memory aging by nearly 5 years (4.8 years) in adults 65+.
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• A 2-year training study by Ben Levine took sedentary 50-year-olds (using the Norwegian 4x4) and reversed heart aging by 20 years, making their hearts structurally resemble 30-year-olds'.
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• Vigorous-intensity exercise produces lactate, which the brain consumes as fuel and which acts as a signaling molecule activating BDNF; one year of training grew the hippocampus 1-2% instead of the usual 1-2% age-related loss.
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• A study giving 20-25 grams of creatine after ~21 hours of sleep deprivation not only negated the cognitive deficits but improved cognition beyond rested baseline.
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• Vitamin D conversion in the liver requires magnesium, and roughly 50% of the US population is magnesium-insufficient, helping explain why so many people stay vitamin D deficient despite supplementing.
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• Finnish data show sauna use 4-7x/week was associated with 24-40% lower all-cause mortality and roughly 66% lower dementia and 65% lower Alzheimer's risk, with dose dependence.
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• Microplastics accumulate up to 20x more in the brain than other organs, and people with Alzheimer's had up to 20x more microplastics in their brains than those without.
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• The 'sick quitter' confounder undermined many studies claiming moderate alcohol is protective, because former drinkers who quit due to illness were miscounted as lifelong non-drinkers.
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• A 70-year-old makes about four times less vitamin D from sun exposure than their former 20-year-old self.
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• Broccoli sprouts contain about 100 times more of the sulforaphane precursor glucoraphanin than mature broccoli.
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• Sulforaphane activates NRF2 phase-2 detox enzymes; people start excreting 60% more benzene within 24 hours of taking it.
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• People practicing intermittent fasting naturally eat about 200 fewer calories per day, which accounts for much of the weight loss.
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• During a prolonged fast you can lose up to 10 pounds of water weight and your organs actually shrink as damaged cells undergo cell death.
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• A Polish sauna study found protection only below 190 degrees F; saunas in the 190-200 degree F range were associated with increased risk.
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• A hot bath kept at 104 degrees F for about 20 minutes produces effects on blood pressure comparable to a sauna.
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• Sauna heat lowers sperm motility, but the changes reverse after about 6 weeks of abstaining (and it does not work as contraception).
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• University of Chicago research found African-Americans must stay in the sun 6-10 times as long as Caucasians to make the same amount of vitamin D3, because melanin acts as a natural sunscreen.
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• A recent Emory animal study found psilocybin increased life expectancy by almost 20% in mice.
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