Read the actual studies. The differences they talk about are tiny, and barely measurable.

Without going into too much math here, most studies like this report the data as Relative Risk, or Odds Ratios. (Such as RR or 1.98 2.2.)

Note that in the most 'compelling' study, saturated fat intake showed a RR of 2.2.

By most standards, that's barely significant. In fact, MOST studies about diet and such show piddly RR's.

(A good primer on this RR business: http://www.junkscience.com/JSJ_Cour...docourse/14.htm)

Anyway, to quote from one of the studies cited:

"Intakes of total fat, animal fat, and dietary cholesterol were not associated with Alzheimer disease." Arch Neurol 2003 Feb;60(2):194-200~~~~(ISSN: 0003-9942) Morris MC; Evans DA; Bienias JL; Tangney CC; Bennett DA; Aggarwal N; Schneider J; Wilson RS


They've made a mountain out of a molehill, just to get headlines.