This is a research study of how a cholesterol medication known as fenofibrate works differently in people with different genetic backgrounds. "Genetics" refers to certain things that are passed to a person by their parents, such as eye color or hair color. Genetic differences lead to people having different eye and hair color. There are also genetic differences in a protein called liver X receptor-alpha (LXRA), which may be important in predicting the response to fenofibrate.

Inclusion Criteria:

• Triglycerides equal to or above 150mg/dL or Low HDL (below 44 mg/dl for men or below 54 mg/dl for women)
• Must be able to swallow tablets

Exclusion Criteria:

• Known Coronary Heart Disease, symptomatic carotid artery disease, abdominal aortic aneurysm, diabetes, or Framingham risk score above 20%
• Pregnancy, malignancy, liver dysfunction, renal dysfunction, active alcohol abuse, history of unexplained muscle pain
• Current treatment with lipid lowering therapy, estrogens, androgens, progestins, thiazide diuretics, beta-blockers, glucocorticoids (other than inhaled), antihistamines, or chronic anti-inflammatory drugs
• Current treatment with the following the interacting drugs: ursodeoxycholic acid, ursodiol, cholestyramine, red yeast rice, glyburide, glipizide, warfarin, or cyclosporine