The Article say's that HDL can influence the formation of beta-amyloid plaques. Well influence it how? Put that way it sounds like HDL, so called good cholesterol, will cause the plaque build up.
As for diet being a factor in the onset of alzheimer's, I believe that's a no brainer.  -- Pardon the pun.

I have never worried about my cholesterol levels, never taken any statins, but I have seen the consequenses of statin medication in 3 people close to me.

That`s why I started to do my own "research" and what I found was astounding - quite contrary to what the pharmaceutial companies, media and the doctors claim - i.e. that statins will prevent heart attacks,  you will live longer etc.

Please visit www.ravnskov.nu, www.thincs.org, www.spacedoc.net, www.statinalert.org.

Also search for "Stopped our statins" on Google. It`s a very informative site. Under "print articles" you will find some very interesting articles. I particularly like the one from The Weston Price Foundation.

On the Internet I found out that there were several books dealing with these issues.

The Cholesterol Myths (Uffe Ravnskov)
Lipitor - thief of memory (Duane Graveline)
The Great Cholesterol Con (Antony Colpo)
-----------"----------------------  (Malcolm Kendrick)
Overdosed America (John Abramson)

The Truth About The Drug Companies (Marcia Angell)
Malignant Medical Myhts (Joel F. Kauffman)

For more information on these books turn to the Internet.

When it comes to patient stories visits forums on www.spacedoc.net and

www.medications.com.
On the first page you will find "medications with most reported side effects". Number 5 is Lipitor, a statin, the most sold medicine in the world.  Click on that line and you will be able to read the sad stories.

Most statins have similar side effects . Also read the stories for Zocor (=Simvastatin) etc.