If it is true that...

The size, complexity, and intelligence of the brain represents a very large part of the "information" contained in the organism

and

The ability to realize this potential, to create this complexity, comes from the support of the environment

Then it must be true that...

Alzheimer's disease is analogous to the situation confronted by the developing chicken embryo or the rat or human fetus, when the environment is unable to meet the needs of highly energetic, demanding and sensitive brain cells