Diet and Parkinson's disease

To the Editor: We are pleased that the findings from our case-control study1 of increased caloric intake in patients with Parkinson's disease (PD) have been confirmed in another case-control study from Germany by Hellenbrand et al.2 Conversely, we found different results when we examined macronutrient intake. Patients with PD had increased intake of fats from animal sources in our study, whereas increased carbohydrate intake was reported by Hellenbrand et al. Increased caloric intake has already been reported in a clinical series3, and this result is surprising considering that patients with PD …