Overview of Lipid Metabolism By Michael H Davidson, MD, FACC, FNLA, University of Chicago Medicine, Pritzker School of Medicine; Pallavi Pradeep, MD, University of Chicago Reviewed / Revised May 2023 View Patient Education Physiology Topic Resources Cardiovascular Risk Assessment... Major Apoproteins and Enzymes... Lipids are fats that are either absorbed from food or synthesized by the liver.