there HAS to be some connection between high cholesterol and strokes and heart disease
Of people who develop coronary heart disease, half have elevated cholesterol levels. Half DO NOT. There is disagreement about what causes heart attacks. The standard belief that cholesterol clogs your arteries and gives you a heart attack is what is known as the "lipid hypothesis".
"During the 70s and 80s, some researchers and practitioners considered the lipid hypothesis as unverified due to the lack of proof at that time that lowering blood cholesterol levels resulted in decreased risk for atherosclerosis.[19] Some skeptics were questioning its validity by arguing that the studies supporting it were flawed.[20][21] This discussion is also referred to as the "cholesterol controversy." Predictions were made at the time that further research during the 1980s and 1990s would help settle this controversy.[22] However, even after the Coronary Primary Prevention Trial and the NIH Consensus Conference in the mid 80s, criticism persisted in a minority of the scientific community questioning the statistical and mechanistic significance of the associations measured in the trials and the conclusions of the panel.[23]
In the following years, studies with lipid- and cholesterol-lowering drugs such as statins provided further associative evidence in support of the lipid hypothesis.[24][25][26] This was questioned on the basis that the positive effect of statins may be due to other effects than cholesterol-lowering -
a meta-analysis of cholesterol-lowering trials demonstrated that coronary mortality was not lowered by cholesterol lowering, but total mortality was increased.[27] Further studies were designed in the hope of settling the controversy.[28][29][30] The continuing consensus regards the lipid hypothesis as proven; but disagreement still persists among a small group who argue that it is based on associations and misrepresented or overinterpreted data, and has not been shown as a scientifically validated causal mechanism.[17][31][32]"
http://en.wikipedia.org/wiki/Lipid_hypothesis
"The lipid hypothesis of heart disease is, as Dickens wrote of Scrooges partner, Jacob Marley, dead as a doornail, yet, like Marleys ghost, it continues to haunt us. Why? Because the idea that cholesterol causes heart diseasethe lipid hypothesishas been so frequently repeated for so many years that doctors have forgotten that it is only a hypothesis, not a fact.
In simplistic terms the lipid hypothesis is as follows:
a) cholesterol and/or fat in the diet leads to cholesterol and/or fat in the blood;
b) cholesterol and/or fat in the blood causes plaque formation in the arteries and, consequently, heart disease; and, therefore
c) cholesterol and/or fat in the diet causes heart disease.
Sounds simple enough, but problem is there is no hard science behind it. There is a bit of weak, but not fully convincing science that purports to prove a. Less science yet that proves b. Yet were all to believe a leads to b and, therefore, causes c.
One scientifically verified fact disproves the whole lot: only about half the people who have heart attacks have elevated cholesterol levels."
http://www.proteinpower.com/drmike/uncategorized/the-lipid-hypothesis/