Cholesterol itself is divided in two main forms. Low-density lipoprotein (LDL) is the bad cholesterol in the form of fatty deposits in arteries around the heart. While HDL is the good cholesterol, transports fat to the liver to be disposed of safely.
But in recent years, the medical officer had been puzzled by the fact that increased levels of HDL are not effectively cut the number of heart attacks.
In fact, one of the big drug companies do not get approval to launch a new drug to raise HDL levels, after the results showed that the increase in HDL have no benefit in reducing heart disease.
The latest study, by experts at Maastricht University in the Netherlands, shows that increases in HDL levels trigger a negative response of the immune system.
