Very low-density lipoprotein (VLDL) is a type of lipoprotein produced by the liver. It primarily carries triglycerides, a type of fat, through the bloodstream to various tissues in the body. VLDL is considered one of the "bad" cholesterol types because high levels can lead to plaque buildup in arteries, increasing the risk of heart disease. VLDL is classified based on its density, which is lower than that of other lipoproteins like LDL (low-density lipoprotein) and HDL (high-density lipoprotein). Monitoring VLDL levels is important for assessing cardiovascular health and managing conditions like obesity and diabetes.