density
Other lipoproteins also transport lipids throughout the body, but different types of lipoproteins tend to serve different functions. We will discuss some of these differences in the section below on cholesterol and heart disease. Lipoproteins are often classified into five different groups based on their densities. In increasing order of density, these groups include chylomicrons, very-low-density lipoproteins VLDL , intermediate-density lipoproteins IDL , low-density lipoproteins LDL , and high-density lipoproteins HDL .