He also explains that “in the studies that have been done so far, the amount of reduction in plaque buildup that’s seen over the course of a year or two is measured in a 100th of a millimeter.”

http://www.healthline.com/health/heart-disease/reversing-atherosclerosis#2

Can atherosclerosis be reversed or slowed down?

Leading a healthy lifestyle and managing your risk factors is vital to slow the disease’s progression

 

The disease is progressive, and, unfortunately, current treatments can’t melt it away.

https://www.bhf.org.uk/heart-matters-magazine/medical/blocked-arteries

https://www.quora.com/How-can-calcification-of-the-arteries-be-reversed

The article is a dis-service to the public related to reversing heart disease. I doubt the Paleo diet has one case that they can prove reversed heart disease where as doctors like Pritikin, Ornish, Esselstyn and others have proof that they can do it.
They all limit animal protein and those that promote additional fats include nuts, seeds and avocado while getting over 80% of calories from whole plant-based consumption.

The Diet-Heart Myth: How to Prevent and Reverse Heart Disease Naturally

When most people think of plaque they think of a gunky buildup, however it can be misleading. It’s actually scar tissue forming in arteries. This is why we can’t just remove it

ELI5: Does exercise and eating healthy "unclog" our arteries? Or do our arteries build up plaque permanently? from explainlikeimfive

 

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1903567/pdf/amjpathol00229-0037.pdf

 

 

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