Add-on: Key Vitamins & Minerals ($139) Key vitamins and minerals needed for proper function of metabolic processes. These tests will get added to the comprehensive package order form. Can’t be purchased standalone. Must be ordered with comprehensive panel. Test Name Description / Purpose Labcorp Test Code Zinc, serum Zinc level in blood 001800 Copper, serum or plasma Copper level in blood (used to calculate % of free (unbound) copper) 001586 Vitamin B12, and Folate, serum B12 and folate levels in blood. Needed for RBC production, needed to breakdown homocysteine 000810 Vitamin B6, plasma B6 level in blood 004655 Vitamin A (Retinol), serum Retinol level in blood. Must have enough retinol to convert vitamin D into its useable (bioactive) form. 017509