(1) Should levodopa be started early or late in PD?; (2) Should elderly patients be put on dopamine agonists?; (3) How strong is the evidence for efficacy of supplements for PD?; (4) Are natural sources of levodopa better than synthetic levodopa pills?; (5) Can cannabis help PD symptoms and is it safe for PD?; (6) Should deep brain stimulation (DBS) be offered earlier in PD rather than later?