Bile Acids
Gallbladder secretes bile acids onto fat in SI, if not soluble fibre available to bind bile acids, will become reabsorbed in the small intestine back to the liver for reuse.
Chylomicron
Once chylomicron has given triglycerides to cells, enters liver as chylomicrons remnants. phospholipid, protein and cholesterol is within the remnants (all exogenous) and will become repackaged as VLDL
HDL
HDL manufactured by liver, leaves liver to take up cholesterol in cells and brings them back to liver for reuse (exogenous)