This is not true. Apo-A is a lipoprotein, not a sterol.
I was wondering about that. Why, then, if I get my cholesterol measured, do they break it into ldl's and hdl's?
According to some of the literature I read, there are only 18 known natural forms of cholesterol.
Cholesterol isn't really the bad guy anyways. It's the oxidation and irritation of the arteries. The cholesterol is the "patch".
BTW, I do have high cholesterol, but my hdl/ldl is pretty good.