When special proteins wrap themselves around lipids to help move them through the bloodstream, lipoproteins are formed.

There are several types of lipoproteins, including:

  • Chylomicrons
  • Very low-density lipoproteins, or VLDL
  • Low-density lipoproteins, or LDL, and
  • High-density lipoproteins, or HDL

As LDL makes its way through your bloodstream, it has a tendency to deposit some of its cholesterol into the walls of your arteries, which is why LDL is referred to as “bad cholesterol.” HDL, on the other hand, comes along and removes harmful cholesterol, taking it back to the liver to be reprocessed. And this is why HDL is referred to as “good cholesterol.”