Overview
- The peer-reviewed study, published Wednesday in Gut Microbes, reports that a six-metabolite blood signature tied to gut microbes can sort cognitive status with about 79% accuracy.
- The work, led by the University of East Anglia with Queen Mary University of London and part funded by Alzheimer's Research UK, tested 150 adults aged 50 and over across three cognitive groups and profiled 33 gut and diet related molecules in fasting blood.
- A machine-learning model built on six of those molecules classified people as healthy, having subjective memory concerns, or having mild cognitive impairment, and topped 80% accuracy for healthy versus mild impairment.
- The chemical patterns seen in blood moved in step with shifts in specific gut bacteria, pointing to a gut–brain link that may provide an early warning signal before symptoms show up on standard tests.
- Researchers and outside experts cautioned that the small, cross-sectional design cannot prove cause or forecast dementia yet, and they called for larger, long-term validation before any clinic test or nutrition or probiotic advice.