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 TestingFibrinogen $189.00 Add to cart Quick View Quick View Individual TestingExtractable Nuclear Antigen Antibodies (Anti- SSA, Anti- SSB) $149.00 Add to cart Quick View Quick View Individual TestingEstrogen, Total $89.00 Add to cart