Gut microbiota undergo major shifts in Parkinson’s patients, as demonstrated in a recent study performed by Filip Scheperjans, of the University of Helsinki, and his colleagues. The investigators found that the microbiota of Parkinson’s patients had reduced levels of Prevotella bacteria compared with the microbiota of healthy people. Perhaps not coincidentally, Prevotella flourish in the guts of people who eat a plant-based diet, and are reduced in people who eat fewer plants and more meat, milk, and dairy.

