while the plasma concentration of very low density lipoproteins ( d < 1.006 g/ml ) remained at low or moderate levels , major changes in the lipoprotein spectrum occurred in the low density ( 1.006 -- 1.063 g/ml ) and high density ( 1.063 -- 1.21 g/ml ) lipoproteins , these two classes exhibiting marked heterogeneity .
C0023825
very
C0023820
lipoproteins