Parkinson’s disease (PD) is a slow, progressive disorder of the central nervous system affecting between 7 and 10 million people worldwide. In Europe, there are 1.2 million people living with the disease, most of them over 50. PD develops gradually over time and early signs are so subtle that they often go unnoticed. Although we know that some symptoms set in years before the disease is diagnosed, there’s no specific way to detect PD early on.