Testing Knowledge
Test Directory
Source-backed test guides: what each test is for, how it is performed, its limitations, and which reviewed products serve it. Personal health questions are answered with knowledge and preparation guidance — not supplier sales.
Ultra High Sensitivity C-Reactive Protein Measurement
The determination of the amount of C-reactive protein (CRP) present in a sample, usually serum from a blood draw from a subject that does not have a chronic inflammatory condition, through the use of an enhanced particle-enhanced immunoturbidimetric assay. This test is optimized to measure lower concentrations of CRP than a conventional CRP test. Accuracy is enhanced to ultra high levels through the use of a proprietary set of calibrated CRP samples.
Adenovirus Antibody Measurement
The determination of the amount of adenovirus antibody present in a sample.
Monkeypox Virus Measurement
The determination of the amount of Monkeypox virus present in a sample.
24(S),25-Epoxycholesterol Measurement
The determination of the amount of 24(S),25-epoxycholesterol present in a sample.
Marginal Zone B-Lymphocyte Count
The determination of the number of the marginal zone B-lymphocytes in a sample.
Arsenic Measurement
The determination of the amount of arsenic present in a sample.
Dietary Poultry Measurement
A determination of the poultry in a nutritional product or meal, or a portion thereof.
Alprazolam Measurement
The determination of the amount of alprazolam present in a sample.
Indocyanine Green Clearance Measurement
The determination of the amount of the volume of serum or plasma that would be cleared of indocyanine green by excretion for a specified unit of time (e.g. one minute).
STAT3 Measurement
The determination of the amount of STAT3 present in a sample.
Carboxyhemoglobin Measurement
The determination of the amount of carboxyhemoglobin present in a sample.
Segmented Neutrophils to Neutrophils Ratio Measurement
The determination of the ratio of segmented neutrophils compared to neutrophils present in a sample. The measurement may be expressed as a ratio or percentage.
Japanese Encephalitis Virus Antibody Measurement
The determination of the amount of Japanese encephalitis virus antibody present in a sample.
Insulin-Like Growth Factor Binding Protein 3 Measurement
The determination of the amount of insulin-like growth factor binding protein 3 present in a sample.
Gut-Homing Helper Effector Memory T-Lymphocyte Subpopulation to Gut-Homing Helper Effector Memory T-Lymphocyte Ratio Measurement
The determination of the ratio of a sub-population of gut-homing helper effector memory T-lymphocytes to total gut-homing helper effector memory T-lymphocytes present in a sample. The measurement may be expressed as a ratio or percentage.
Interleukin 23 Measurement
The determination of the amount of interleukin 23 present in a sample.
HCoV-229E RNA Measurement
The determination of the amount of Human coronavirus 229E RNA in a biological sample.
American Cockroach Antigen IgA Antibody Measurement
A measurement of the American cockroach (Periplaneta americana) antigen IgA antibody in a biological specimen.
Plasmacytoid Dendritic Cells to Dendritic Cells Ratio Measurement
The determination of the ratio of a subpopulation of plasmacytoid dendritic cells to dendritic cells present in a sample. The measurement may be expressed as a ratio or percentage.
Iron Measurement
The determination of the amount of iron present in a sample.
Erythrocyte Fragment Measurement
The determination of the amount of red blood cell fragments present in a sample.
Non-class-switched Memory B-Lymphocyte Subpopulation to Total Non-class-switched Memory B-Lymphocyte Ratio Measurement
The determination of the ratio of a sub-population of non-class-switched memory B-lymphocytes to total non-class-switched memory B-lymphocytes present in a sample. The measurement may be expressed as a ratio or percentage.
Amorphous Phosphate Crystals Measurement
The determination of the amount of amorphous phosphate crystals present in a sample.
Classical Monocyte Subpopulation to Non-TBNK Leukocyte Ratio Measurement
The determination of the ratio of a sub-population of classical monocytes to all leukocytes that are not T-cells, B-cells, or natural killer cells, present in a sample. The measurement may be expressed as a ratio or percentage.