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) Sample Type Blood (1) Fluid (1) (-) Serum or Plasma (1) Urine (1) Test Area Diagnostic Aids (1) Test Category Alcohols (2) Analgesics (5) Anesthetics (1) Antianxiety (1) Antiarrhythmics (1) Anticholinergics (2) Antidepressants (2) Antiepileptics/Antiseizures (1) Antihistamines (1) Antineoplastics (1) Antipsychotics (1) Antithrombotics (2) Antitussives/Cough Suppressants (1) Benzodiazepines (1) (-) Biomarkers (1) Depressants (2) Diuretics (1) Drugs of Abuse (1) Metals/Elements (5) Muscle Relaxants (1) NPS/Designer Drugs (2) Plasticizers (1) Sedative/Hypnotics (6) Stimulants (1) Test Sub-Category Small Molecule (1) Test Test Name 0642SP Betahydroxybutyric Acid, Serum/Plasma