People suffering from poor gut health with constipation and nausea for a long period may signal the risk of developing Parkinson's disease, according to a study that shows the neurological disorder may begin in the gut and not the brain. 

Parkinson's disease is a progressive neurodegenerative disorder. It affects an estimated 8.5 million people worldwide; and is majorly characterised by tremors, stiffness, and loss of balance.