Glucosamine use linked to quicker cognitive decline in Alzheimer's patients, study finds
An observational study from the University of Florida analyzed patient records and found that people with Alzheimer’s who took glucosamine—a common joint supplement—were about 25% more likely to die within five years than those who didn’t use it. The researchers emphasize the association, not causation, and say a clinical trial is needed to determine if glucosamine contributes to faster cognitive decline. They note that glucosamine might be harmful in brains already experiencing decline but could be safe or even protective in healthy brains; more research is needed on dosage, brands, and patient context.