Having a sister who developed PD, has there been a study that has asked the dietary and lifestyle history of all those with PD? If not, why not? The people reading this have an opportunity to give details of their lifestyle prior to their diagnoses. I can 'start the ball rolling' and will. My sister has had problems with her weight since a teenager. Over the years she has gone down the 'low fat, diet meals sugar is bad for you lifestyle + antibacterial, kills germs dead wipes, sprays and lotions etc etc'. She has never smoked, has had no head trauma, doesn't drink and has followed all the prescribed main stream advice and has PD. In contrast, i have drank enough whiskey to kill 3 men and smoked more than enough to do the same, and so has my younger sister. I have had 100s of strokes and some very severe head injuries but no PD and neither has my younger sister, genes? i don't think so.