Prions are at the root of brain problems, that's news to me. I thought they were only in Mad Cow... Some jerk of an engineer I used to work with went hunting in Minnesota every year and returned with sausage made from deer meat... so I ate it every year until I read an article about Mad Cow disease in deer in Minnesota.. so I mention it to the jerk and he says "Oh that's in the next herd over from the one we hunt". Maybe in the alzheimer research they will put a stop to Mad Cow? I hope so just in case...