Glucosamine Linked to Higher Dementia Risk

Regular use of the over-the-counter joint supplement glucosamine is associated with a 25% higher probability that mild cognitive impairment will progress to dementia, according to a study published in Nature Metabolism. The analysis also linked the supplement to a 25% increase in mortality among patients already diagnosed with dementia.

How does glucosamine affect cognitive decline?

Researchers analyzed medical records from 2012 to 2024 involving approximately 60,000 patients with varying levels of cognitive impairment. The data indicates that regular glucosamine use correlates with a 25% increase in the likelihood of transitioning from mild cognitive impairment to dementia.

What is the link between glucosamine and mortality?

The Nature Metabolism analysis found that patients already living with dementia who used glucosamine had a 25% higher probability of death during the study period. This specific increase in mortality was not observed in patients who only had mild cognitive impairment.

Researchers suggest this indicates that the supplement’s impact may be more severe for individuals who have already progressed to dementia. The findings highlight a potential difference in risk based on the stage of cognitive decline.

How does glycosylation impact brain function?

Animal trials revealed that glucosamine exacerbates a harmful brain process called hyperglycosylation. This occurs when sugar molecules bind abnormally to proteins in the brain, which disrupts vital neurological functions.

Matt Gentry of the University of Florida described the electronic health record data as “striking” in a statement. He clarified that while the data shows a correlation rather than a causal link, it presents a clinical question that requires significant attention.

What may happen next in dementia research?

Because the decline in dementia is linked to increased glycosylation resulting from glucosamine use, this biological process could become a target for future treatments. Scientists may investigate whether blocking this pathway is a possible way to combat the disease.

Frequently Asked Questions

What is glucosamine used for?
It is a common over-the-counter supplement used to treat joint pain.

What was the risk for patients with mild cognitive impairment?
Regular use of the supplement was associated with a 25% increase in the probability of their condition progressing to dementia.

Did the supplement increase death risk for all patients?
No. The 25% increase in mortality was only observed in patients who already had dementia, not in those with only mild cognitive impairment.

Do you discuss over-the-counter supplements with your healthcare provider before starting them?