Question 169 of 433
I heard that Ozempic or lithium might prevent Alzheimer’s. True?
The short answer
Not proven, and for one of them the major trial was negative.
People with diabetes taking GLP-1 medicines seemed to have less dementia in observational data. But when oral semaglutide was tested directly in more than 3,800 people with early Alzheimer’s, it did not slow the disease. The result was announced in late 2025.
Lithium made headlines in 2025 when Harvard researchers reported that lithium levels were low in the brains of people with Alzheimer’s, and that a form called lithium orotate reversed memory loss in mice. That is a mouse result. No human trial has shown benefit, no safe dose has been established, and lithium can harm the kidneys and thyroid. Do not treat yourself with it.
“This book is for education. It is not medical advice, and reading it does not make you my patient or create a doctor-patient relationship.” From the book’s medical disclaimer. Full disclaimer
NEGATIVE HUMAN TRIAL for oral semaglutide in early Alzheimer’s; PRECLINICAL for the highlighted lithium strategy.Evidence grade (draft mapping)DPreclinical / mechanisticFNot demonstrated / insufficientPart 12, Q169 · Part sources
From Longevity Unmasked by Afshine Ash Emrani, MD, FACC. Medical disclaimer. This book is for education. It is not medical advice, and reading it does not make you my patient or create a doctor-patient relationship. Nothing here is meant to diagnose, treat, cure, or prevent any disease. Medicine is personal: a test, drug, supplement, or exercise plan that helps one person can harm another. Do not start, stop, or change any medication or treatment because of something you read in these pages. Talk with a licensed clinician who knows your history first. If you think you are having a medical emergency, call 911. The author disclaims responsibility for any loss or harm arising from use of the information in this book.