Parkinson’s symptoms: A staring glare could be a sign of the progressive condition

Evidence suggests exposure to toxic chemicals, viruses, bacteria and heavy metals may cause dopamine-producing cells to die.

“There has been much speculation about a link between the use of herbicides and pesticides and the development of Parkinson’s,” said EPDA.

The organisation added: “Active research into the causes of Parkinson’s continues every day.”

Risk factors

The biggest risk factor for developing Parkinson’s disease is being 60 years old or older.