“Celiac Disease A/B Screen” has been added to your cart. View cart “Fibrinogen” has been added to your cart. View cart “Follicle-stimulating Hormone (FSH)” 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 TestingHomocysteine, Plasma $89.00 Add to cart Quick View Quick View Individual TestingCancer Antigen 125 (CA 125) $109.00 Add to cart Quick View Quick View Individual TestingExtractable Nuclear Antigen Antibodies (Anti- SSA, Anti- SSB) $149.00 Add to cart