Lipid studies in obesity.

The complications of obesity are manifold and proper management must include investigation and treatment of associated disorders. For investigation of lipid abnormalities, the subject must consume a normal western diet for at least two weeks prior to laboratory tests. The patient must fast for at least 14 hours before withdrawal of blood. Causes of secondary hyperlipoproteinemia must be ruled out by history, physical examination, and laboratory investigation. Consumption of alcohol, and, in women, the use of birth control pills must be specifically asked about. At least two values for cholesterol and triglycerides, and preferably three, must be recorded before a diagnosis of hyperlipidemia is made. Once a diagnosis is made, electrophoretic typing should be done before therapy is instituted.