Form of genetically elevated 'good' cholesterol may actually be bad

The generally accepted medical maxim that elevated HDL cholesterol is 'good' has been overturned by a multi-center, international study, They show that a certain genetic cause of increased HDL-C may actually be 'bad,' noting that a specific mutation in a gene which encodes a cell receptor protein that binds to HDL prevents the receptor from functioning. It causes an increased risk of heart disease even in the presence of elevated levels of 'good' cholesterol.