Ok, so the plot thickens slightly as, per the study itself, three of the five of the mummies from Unangan hunter gatherers from the Aleutian Islands were found to have clogged arteries.  This was taken as evidence that even paleo diets are arteriosclerotic.

However, per Jeffry Gerber, MD:

> "...at the time the 5 discovered mummies were actually living people (1756–1930 CE), not more than a few short hundred years ago, they were hardly an isolated group. The Fur Seal industry exploded in the 18th century bringing outside influence, often violent, from countries including Russia and Europe. These once living people, now mummies, may have been exposed to foods other than their traditional diet during this time.
> 
> Only 5 not very old Unangan/Aleuts mummies to work with and yet they represented the supposed hunter gatherers arm of this study is rather unimpressive. The investigators took a bold leap of faith to suggest that since all the mummy groups had calcifications, diet does not seem to matter and that all humans are predisposed to develop plaque.
> 
> True hunter gatherers mummies are not well represented in this study and it might be very hard to find collections from such ancient civilizations who probably knew nothing about the mummification process. This study provides a nice discussion of how available foods changed with the introduction of farming and agriculture, but otherwise does not add much to the ongoing debate regarding nutrition and health throughout the ages."