OK basically from what I can tell reading a shitload of science is that science doesn't actually know what causes atherosclerosis.
It doesn't appear to be saturated fat:
>>21707161
But there isn't convincing evidence pointing towards anything else, either.
It may just be that genetic susceptibility is the most important factor.
I think eating a balanced diet is reasonable. No need to overstress over fat amounts or types. Just eat a balanced diet. That's what I try to do. I'm not obsessive about it and I could do a better job of it, but I'm in my 40's, had a calcium score test done (due to some chest pain that turned out to be indigestion) and it came back 0. I eat a shitload of butter and meat, but I also try to balance my carbs/fat/protein, make sure I get some veggies and fruit on a regular basis, eat whole grain carbs instead of refined carbs on a regular basis, and snack on nuts on a regular basis. I don't do any of this religiously or on a set schedule or anything. Pretty loose about it.
I also regularly take brisk walks - this probably helps. Again, not religiously or anything.
