Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) Inductively Coupled Plasma/Mass Spectrometry (ICP/MS) (1) Inductively Coupled Plasma/Optical Emission Spectrometry (ICP/OES) (1) Sample Type Blood (3) Fluid (1) Hair (1) (-) RBCs (1) Serum or Plasma (3) (-) Stool (1) Urine (3) Test Area Exposure (2) Test Category Metals/Elements (2) Test Sub-Category (-) Macrominerals (2) Other (2) Toxic Elements (1) Trace Elements (2) Test Test Name 2551R Magnesium - Total, RBCs 2551ST Magnesium - Total, Stool