671. Why Has There Been So Little Progress on Alzheimer’s Disease?

Decades of Alzheimer’s research have been heavily influenced by the amyloid cascade hypothesis, which posits that beta-amyloid plaque accumulation is the primary driver of the disease. However, investigative journalist Charles Piller and neuroscientist Matthew Schrag argue that this dominant theory has been sustained by systemic research misconduct, including the manipulation of scientific imagery in influential studies. Billions of dollars in federal funding have been directed toward anti-amyloid drug development despite clinical evidence showing these treatments offer, at best, marginal cognitive benefits while carrying significant health risks. The investigation highlights a pattern of regulatory capture and institutional complacency, where universities and agencies often fail to address fraudulent data. Moving forward, experts suggest shifting focus toward broader factors like blood vessel health and waste clearance mechanisms in the brain to better address the complex, multifactorial nature of neurodegenerative decline.