Some “Good” Cholesterol May Be Bad For Heart

Fr0m the 20 May 2012 article at Medical News Today

It appears that in some cases, high-density lipoprotein (HDL) cholesterol, the so-called “good” cholesterol, does not protect againstheart disease, and may even be harmful. A new study suggests a subclass of HDL that carries a particular protein is bad for the heart.

Previous studies have shown that high levels of HDL cholesterol are strongly linked to low risk of heart disease. But trials where people have been given drugs to increase their levels of HDL cholesterol have yielded inconsistent results: leading to the idea that HDL cholesterol may actually have protective and non-protective elements.

Now, researchers at the Harvard School of Public Health (HSPH) have found that when the surface of HDL cholesterol bears a small protein called apolipoprotein C-III (apoC-III), there is an increase in the risk of heart disease, and when it is absent, HDL cholesterol is especially heart protective….

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