And again, more nuanced than "vegan diets", taking just the abstract of the linked hypothesis: > Three recent case-control studies conclude that diets high in

And again, more nuanced than "vegan diets", taking just the abstract of the linked hypothesis: > Three recent case-control studies conclude that diets high in animal fat or cholesterol are associated with a substantial increase in risk for Parkinson's disease (PD); in contrast, fat of plant origin does not appear to increase risk. > In aggregate, these findings suggest that vegan diets may be notably protective with respect to PD. However, they offer no insight into whether saturated fat, compounds associated with animal fat, animal protein, or the integrated impact of the components of animal products mediates the risk associated with animal fat consumption. That is, the underlying cause could very well just be high cholesterol, and that the carnivores in the study were more likely to have high cholesterol than the vegan groups, either due to lifestyle choices (despite veganism itself not implying any sort of healthy lifestyle, there might be a stronger overlap with those choosing veganism and those leading a healthy lifestyle than for carnivores), or due to difference in dietary cholesterol intake.