“Fibrinogen” has been added to your cart. View cart “Cancer Antigen 125 (CA 125)” has been added to your cart. View cart Previous Product Next Product Magnesium, Serum $139.00 Evaluate levels of magnesium in the blood (urine) and determine the cause of abnormal magnesium levels. Magnesium, Serum quantity Add to cart Category: Individual Testing Description Description Magnesium, Serum Related products Quick View Quick View Individual TestingEstradiol $85.00 Add to cart Quick View Quick View Individual TestingCyclic Citrullinated Peptide Antibody (CCP) $149.00 Add to cart Quick View Quick View Individual TestingAnti-extractable Nuclear (A/g) $149.00 Add to cart