Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) Enzymatic Assay (EZA) (1) Gas Chromatography/Mass Spectrometry (GC/MS) (1) Sample Type Blood (1) (-) Fluid (1) Serum or Plasma (1) (-) Urine (1) Test Area Diagnostic Aids (2) Test Category (-) Biomarkers (2) Electrolytes (2) Test Sub-Category (-) Small Molecule (2) Test Test Name 0420FL Betahydroxybutyric Acid, Fluid 0642U Betahydroxybutyric Acid, Urine