Dietary patterns and Alzheimer's

I'm still researching the possible link between consuming animal products and dementia. I did find this recent study about Alzheimer's. It supports other info I have come across suggesting that consuming large amounts of protein could contribute to dementia. I don't know how rigorous these studies are, however -- I haven't gone over the methods and numbers carefully. I'm definitely going to keep pursuing; there's enough here to give me pause.