mentioned: high density lipoproteins (HDL), intermediate lipoproteins (IDL), low density lipoproteins (LDL), very low density lipoproteins (VLDL)
https://doi.org/10.1351/goldbook.09853
Assemblies of lipids and proteins in blood plasma transporting lipids between tissues.
Note: They are structurally very similar to intracellular lipid droplets. They are classified according to their size and buoyant density into five types with different functions: chylomicrons, very low density lipoproteins (VLDL), intermediate lipoproteins (IDL), low density lipoproteins (LDL), and high density lipoproteins (HDL).