You said that the healthiest people have low cholesterol their entire lives, but there doesn't seem to be any data to back that up. For those with the very highest cholesterol, perhaps there is some advantage to lowering it with statins. But what is the level where there is a net benefit rather than harm? I can tell you I found statins to be an insidious poison, and I'll bet half those on it are suffering to a lesser degree but haven't made the connection.
Low cholesterol is not harmful. There is nothing to prove that. Humans do fine with low levels. Low level is natural for humans. Western high levels are very unnatural. High cholesterol is the problem.
What kind of data do you mean? There are tons of data supporting the lipid hypothesis. LDL is a causal factor. It actually causes atherosclerosis.
There are also studies about populations with low cholesterol levels. These populations do not have atherosclerosis. With a cholesterol level under 150 you are practically immune to atherosclerosis.
Edited by hivemind, 05 August 2012 - 12:18 PM.