Snapshot · The Peter Attia Drive
Ezetimibe itself cannot cross the blood-brain barrier, but its metabolite ezetimibe glucuronide can penetrate in small amounts and has shown anti-inflammatory effects in the brain in animal studies.
Where this was said
At 1:20:38 · chapter starts 1:19:30
Peter asks about ezetimibe — a drug that works in the gut by blocking intestinal cholesterol absorption and might seem irrelevant to brain health. Tom acknowledges it shouldn't have a brain effect based on first principles, but then reveals that ezetimibe's main metabolite, ezetimibe glucuronide, can cross the blood-brain barrier in small amounts [1] — Tom Dayspring "Ezetimibe works in the gut and can't cross the blood-brain barrier — but its metabolite, ezetimibe glucuronide, can. Animal studies show it…" 1:19:40 . In animal studies, it interferes with hexokinase and reduces glycosylation of brain proteins, producing anti-inflammatory effects. Neurologists who specialize in Alzheimer's prevention — Tom names Richard Isaacson and Kelly Endiotes — have anecdotally observed cognitive benefits in patients taking ezetimibe, beyond what would be expected from ApoB lowering alone. Tom frames a plausible clinical strategy: for APOE4 carriers with elevated ApoB, a combination of low-dose statin plus ezetimibe may target both cardiovascular and brain health simultaneously. He notes that existing trial biobanks from ezetimibe studies could in principle be mined for pre- and post-treatment P-tau and amyloid-beta-40/42 data without needing a new trial.
Ezetimibe works in the gut and can't cross the blood-brain barrier — but its metabolite, ezetimibe glucuronide, can. Animal studies show it interferes with hexokinase and reduces brain protein glycosylation, producing anti-inflammatory effects. Neurologists already report anecdotal cognitive benefits in patients.
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