I was astounded in nursing school when I learned that approx 80% of the cholesterol in you body is made by your body. Only the other 20ish percent comes from dietary intake.
Very interesting article jmez! I work in cardiac care, and one of my main roles is educating patients about "heart healthy" diet prior to discharge. There has been a fundamental switch in what medical science considers healthy for cardiac health. It has taken a long time, but I am starting to see docs recommend a "real foods", "Mediterranean style", or "no refined carbs/concentrated sweets" diet now much more frequently than the low fat/low cholesterol diet they used to preach.
It's important to realize that while dietary cholesterol may not be much of a contributor to overall blood cholesterol numbers, for an individual to have high LDL (so called "bad cholesterol"), or low HDL ("good cholesterol") does put the at much higher risk of having heart disease or for experience a heart attack. And yes some of it is genetic, I took care of a 50 year old competitive Nordic ski racer who was vegetarian and ended up with quadruple bypass. Everyone in his family had high cholesterol and heart disease.