Gut & Microbiome

How Your Gut Microbiome May Drive Alzheimer's and Parkinson's Disease

Alzheimer's and Parkinson's disease are defined by the buildup of misfolded, aggregated proteins inside brain cells — a breakdown of what scientists call proteostasis. A compelling new review from the University of Florida synthesizes growing evidence that the gut microbiome plays a direct role in this process. Microbes and their byproducts — including metabolites, extracellular vesicles, functional amyloids, and toxins — can interfere with the body's protein quality-control machinery. When the microbiome is disrupted (dysbiosis), these factors may lower the threshold at which protein aggregation becomes catastrophic. Critically, these gut-brain disturbances often appear before neurological symptoms emerge, suggesting that targeting the microbiome could be a viable early intervention strategy to slow or prevent neurodegenerative disease.