Parkinson’s disease is one of the most awful and incurable diseases which can affect an older person. It is caused by a degeneration of nerve endings, principally motor nerves, in the central nervous system. Researchers have recently been questioning whether gut bacteria played any way in the onset of Parkinson’s. By rigorously testing genetically identical mice, they have concluded that, yes, Parkinson’s is related to or may even be initiated by the gut biome. This represents a major paradigm shift in approaches to treatment and prevention.