Alzheimer's is starting to be referred to as Type 3 diabetes that the correlation between metabolic syndrome and the disease is incredibly high.

I wonder how much this has to do with the relative uptake of carbohydrate sources and in particular refined sugars (namely fructose) in the typical diet. It seems the more that we learn, the less good refined vegetable oils and the level of fructose intake in people's diets is. I'm not convinced the amount of refined grains people eat is particularly good either.

However is seems that sugar (fructose specifically) and refined oils (linoleic acid specifically) are particularly bad in the increased quantities since the early 1900's.