[yetanotherphd]

The wikipedia article I linked references about a dozen studies or meta-analyses, most of which establish a link between dietary saturated fat, and heart disease.

All of them were done after the 1970's.

Seriously, get back to me when you have read all of them.

[tghw]

A causal link, or a correlation? Because it matters, and that's what the article is making clear. Those correlation links lead to bad guidelines because the cause is not understood.