Currently, there is no objective molecular or biochemical test for PD; its diagnosis is based on clinical criteria, mainly by cardinal motor symptoms, which manifest when patients have lost about 60–80% of dopaminergic neurons. Therefore, it is urgent to establish a panel of biomarkers for the early and accurate diagnosis of PD. Once the disease is accurately diagnosed, it may be easier to unravel idiopathic PD’s pathogenesis, and ultimately, finding a cure. This review discusses several biomarkers’ potential to set a panel for early idiopathic PD diagnosis and future directions. CLICK TO REVIEW