What does the gut have to do with developing Parkinson’s disease? Parkinson’s disease is an ever-worsening neurodegenerative disorder that results in death and affects about 1 in 50 people as they get older. A small minority of cases are genetic, running in families, but 85% to 90% of cases are sporadic, meaning they seem to pop up out of nowhere. Parkinson’s is caused by the death of a certain kind of nerve cell in the brain. Once about 70% of them are gone, the symptoms start. What kills off those cells? It still isn’t completely clear, but the abnormal clumping of a protein called alpha-syn...

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