Citation needed. Ancestrally appropriate foods like butter, lard, and tallow are significantly less deadly than vegetable oils. The most compromising thing about vegetable oils is their omega 6 rate. The ideal ratio of O3 to O6 is 1:3 to 1:5. Currently, the American populace is eating at around 1:25. In those doses, vegetables become highly inflammatory and can damage tissue including arteries (thus prompts the rise of cholesterol to plaster over the damage). It also does not help that vegetable oil, when exposed to high heat, gets converted into an unstable compound that worsens inflammation. It also does not help that it is treated with high heat during production.

Saturated fat has none of these issues and is actually beneficial especially eggs which have been known to reduce CVD risk.