Also LDL and HDL are not cholesterol, they're used as representative markers. Cholesterol is essential for a multitude of different physiological processes. The jury is still out on whether cholesterol causes plaques or not, there is evidence that cholesterol is present because there is a clot not because it caused the clot. Look at Malcolm Kendrick's website for his view, as a GP, on the subject, he has devoted 34 blog entries examining the causes of CVD taking into account evidence from medical journals.