Proper patient preparation, specimen collection, and specimen storage procedures for lipid studies:
Normal carbohydrate and lipid diet for 2 preceding weeks. Fast for 12 hours before specimen collection. (...only endogenous lipids)
Collect in Heparin Plasma for triglyceride assays. Serum is acceptable but is known to trap a little TG.
Collect in Na2EDTA plasma for Lipoprotein Electrophoresis.
Keep refrigerated and do not freeze.