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.
HIV-1 gp160 Antibody Measurement
The determination of the amount of HIV-1 gp160 antibody present in a sample.
Vitamin D2 Measurement
The determination of the amount of Vitamin D2 present in a sample.
Dietary Clupanodonic Acid Measurement
A determination of the total 22:5 clupanodonic acid in a nutritional product or meal, or a portion thereof.
Conventional Central Memory T-Lymphocyte to T-Lymphocyte Ratio Measurement
The determination of the ratio of the conventional central memory T-lymphocytes to T-lymphocytes present in a sample. The measurement may be expressed as a ratio or percentage.
Ionized Calcium Measurement
The determination of the amount of ionized calcium present in a sample.
CD161 to Lymphocyte Ratio Measurement
The determination of the ratio of CD161 expressing cells to total lymphocytes present in a sample. The measurement by be expressed as a ratio or percentage.
Intermediate Natural Killer Cell Subpopulation to Leukocyte Ratio Measurement
The determination of the ratio of a sub-population of intermediate natural killer cells to total leukocytes present in a sample. The measurement may be expressed as a ratio or percentage.
Non-Class-Switched Memory B-Lymphocyte Subpopulation to Non-Class-Switched Memory B-Lymphocyte Subpopulation Ratio Measurement
The determination of the ratio of a subpopulation of non-class-switched memory B-lymphocytes to a subpopulation of non-class-switched memory B-lymphocytes present in a sample. The measurement may be expressed as a ratio or percentage.
Partial Pressure of Carbon Dioxide Measurement
A measurement of the partial pressure of carbon dioxide in a sample.
Chlamydia Trachomatis Antigen Measurement
The determination of the Chlamydia trachomatis antigen present in a sample.
Double-Positive T-Lymphocyte Subpopulation Count
The determination of the number of sub-population of double-positive T-lymphocytes (T-lymphocytes that are both CD4+ and CD8+) in a sample.
Clonazepam Measurement
The determination of the amount of clonazepam present in a sample.
Casein Measurement
The determination of the amount of casein present in a sample.
Human Parainfluenza Virus 2 Measurement
The determination of the amount of Human Parainfluenza Virus 2 in a sample.
IgG1 Autoantibody Measurement
The determination of the IgG1 autoantibody in a biological specimen.
Benzo[a]pyrene Measurement
The determination of the amount of benzo[a]pyrene in a sample.
Duke Pancreatic Monoclonal Antigen Type 2 Measurement
The determination of the amount of Duke pancreatic monoclonal antigen type 2 present in a sample.
Plasmacytoid Dendritic Cell Count
The determination of the amount of plasmacytoid dendritic cells present in a sample.
Gut-Homing Peripheral Helper T-Lymphocyte Subpopulation to Peripheral Helper T-Lymphocyte Ratio Measurement
The determination of the ratio of a sub-population of gut-homing helper peripheral T-lymphocytes to total helper peripheral T-lymphocytes present in a sample. The measurement may be expressed as a ratio or percentage.
Mycobacterium Tuberculosis Measurement
The determination of the amount of mycobacterium tuberculosis present in a sample.
A Proliferation-Inducing Ligand Measurement
The determination of the amount of a proliferation-inducing ligand present in a sample.
Intraepithelial Lymphocytes to Enterocytes Ratio Measurement
A relative measurement (ratio or percentage) of the lymphocytes to enterocytes within the epithelium of a biological specimen.
Xylose Measurement
The determination of the amount of xylose present in a sample.
Mature Natural Killer Cell Subpopulation Count
A measurement of a sub-population of mature natural killer cells present in a sample.