EXPLAINER: Glucosamine and Alzheimer's: Protection or Poison?

The same glucosamine pill millions take for joint pain may protect a healthy brain — and accelerate Alzheimer's in a brain already in decline. Here's the science. In this episode of Health Longevity Secrets, Robert Lufkin MD breaks down the 2026 plot twist on glucosamine and dementia: why a supplement once hailed as a longevity hack now carries an Alzheimer's warning, and why the answer comes down to one thing — the state of your metabolism. The same molecule helped the metabolically healthy ...