Note: Type 3 Diabetes is just a reference to the article.
I'm quite sure most people already know what Type 1 and Type 2 diabetes are referenced to.
But as a refresher for Type 1, you were born with it.
And for Type 2, what you've eaten has caused you to get insulin resistance.
Now they are finding out that Alzheimer may be related. Foods that we often think of causing a higher likelihood of diabetes (junk foods and [overly] processed foods[such as high fructose corn syrup that is prevalent on almost every food on the shelves) may also cause Alzheimer (whether earlier in life or later in life.)
They are still researching. But if there is a case of Alzheimer with our diets, that is another case against the overblown processed food we have.
EDIT: Type 1 Diabetes: "you're not actually born with it. It typically presents itself when a person is around 10-13 years of age."