Snapshot · The Peter Attia Drive
Anti-amyloid therapies like lecanemab and donanemab show only 0.3–0.4 point improvements on the 18-point CDR Sum of Boxes scale, a modest but potentially meaningful shift.
Where this was said
At 56:32 · chapter starts 51:45
The three FDA-approved anti-amyloid monoclonal antibodies — aducanumab (withdrawn), lecanemab, and donanemab — all clear amyloid plaques from the brain, but their clinical benefit on the 18-point CDR Sum of Boxes scale is only 0.3–0.4 points compared to placebo, a small but potentially meaningful effect that Gayatri Devi believes is larger when treatment is earlier [1] — Gayatri Devi "Anti-amyloid monoclonal antibodies like lecanemab and donanemab can clear amyloid from the brain, but carry a greater than 40% risk of ARIA…" 52:58 . The most serious risk is ARIA — brain edema and hemorrhage caused by the antibodies disrupting amyloid-laden artery walls — which exceeds 40% in standard protocols for APOE4 homozygotes. Her ultra-slow titration protocol reduces ARIA to roughly 4% in published data from her practice. However, insurance companies refuse to reimburse off-protocol dosing for lecanemab, meaning patients who want the safer protocol must pay out of pocket — a systemic barrier she describes with visible frustration. Donanemab's approved titration schedule is more flexible, allowing her to implement slow escalation without insurance conflict.
Aducanumab was approved in 2021 against its FDA advisory board's recommendation because clearing amyloid didn't translate to clear clinical benefit in the trials. Gayatri Devi prescribed it anyway, applying a simple personal test: would she want it herself if she had Alzheimer's? Her answer was yes.
Anti-amyloid monoclonal antibodies like lecanemab and donanemab can clear amyloid from the brain, but carry a greater than 40% risk of ARIA in standard protocols for APOE4 carriers. Gayatri Devi developed an ultra-slow titration protocol that reduces this risk to approximately 4%, allowing even high-risk APOE4 homozygotes to access potentially life-changing therapy.
Aducanumab carried a greater than 40% incidence of abnormal brain bleeding and swelling (ARIA), driving Gayatri Devi to develop her slow-titration protocol.
Gayatri Devi's slow-titration protocol for APOE4 carriers on anti-amyloid monoclonal antibodies yields only a 4% rate of ARIA, far below standard protocols.
Spencer Greenberg and Jeremy Stevenson analyzed almost 500 self-improvement techniques and found they all reduce to just 12 underlying psychological drivers.
Cold exposure has good short-term alertness benefits but the evidence base for long-term health benefits is much weaker than popularly believed.
In a randomized study of 20 habit-formation techniques run on hundreds of people, almost none of the techniques produced statistically meaningful results.
People given a tiny-habit fallback option (e.g. 10 squats instead of gym) were actually MORE successful at completing the full habit, not less.
The most effective habit-formation technique was 'habit reflection' — recalling a past successful habit, writing down what helped, then applying those lessons to a new habit.
A study found that simply scheduling enjoyable activities was as effective as standard cognitive behavioral therapy for depression, leading to its own therapy called behavioral activation.
The 'worry time' technique — deferring all worries to a designated time of day — helps people realize they have more control over worry than they thought and reveals it is less useful than it feels.
A study found that participants told to try to stay awake while in bed fell asleep faster than participants told to try to sleep — illustrating the paradox of direct effort.
Spencer Greenberg reduced his severe social anxiety dramatically in roughly 6 months through a structured exposure therapy hierarchy, culminating in asking strangers for hugs.
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