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.

Babesia microti IgG Antibody Measurement
The determination of the amount of Babesia microti IgG antibody present in a sample.
Gut-Homing Mucosal-Associated Invariant T-Lymphocyte to Mucosal-Associated Invariant T-Lymphocyte Ratio Measurement
The determination of the ratio of gut-homing mucosal-associated invariant T-lymphocytes to total mucosal-associated invariant T-lymphocytes present in a sample. The measurement may be expressed as a ratio or percentage.
Risperidone and 9-Hydroxyrisperidone Measurement
The determination of the amount of risperidone and 9-hydroxyrisperidone in a sample.
Alpha Glutathione-S-Transferase Measurement
The determination of the amount of alpha glutathione-s-transferase present in a sample.
Rouleaux Formation Count
The determination of the number of stacking red blood cells present in a blood sample.
Steroid Sulfatase Measurement
The determination of the amount of steroid sulfatase in a sample.
Basophilic Stippling Measurement
The determination of the amount of basophilic stippling present in a sample.
Symmetric Dimethylarginine Measurement
The determination of the amount of symmetric dimethylarginine present in a sample.
American Cockroach Antigen IgG4 Antibody Measurement
A measurement of the American cockroach (Periplaneta americana) antigen IgG4 antibody in a biological specimen.
Intermediate Monocyte to Leukocyte Subpopulation Ratio Measurement
The determination of the intermediate monocytes to a sub-population of leukocytes present in a sample. The measurement may be expressed as a ratio or percentage.
Naive Regulatory Helper T-Lymphocyte Subpopulation Count
The determination of the amount of a sub-population of helper regulatory naive T-lymphocytes present in a sample.
Amino Acid Ratio Measurement
The determination of the ratio of one amino acid compared to another amino acid present in a sample. The measurement may be expressed as a ratio or percentage.
Retinol Binding Protein Measurement
The determination of the amount of retinol binding protein present in a sample.
Urea Nitrogen Measurement
The determination of the amount of urea nitrogen present in a sample.
Myeloperoxidase Measurement
The determination of the amount of myeloperoxidase present in a sample.
Microbial-induced IgM Antibody Measurement
The determination of the amount of microbial-induced IgM antibody in a sample.
Human Papillomavirus Type 70 Measurement
The determination of the amount of Human papillomavirus type 70 in a sample.
Fungi Measurement
The determination of the fungi present in a sample.
Cytokeratin 19 Fragment 21-1 Measurement
The determination of the amount of the cytokeratin 19 fragment 21-1 present in a sample.
Serum Albumin Measurement
A quantitative measurement of the amount of albumin present in a sample of serum.
Follicular Helper T-Lymphocyte Subpopulation Count
The determination of the amount of follicular helper T-lymphocytes present in a sample.
Oxyhemoglobin to Total Hemoglobin Ratio Measurement
The determination of the ratio of oxyhemoglobin compared to total hemoglobin present in a sample. The measurement may be expressed as a ratio or percentage.
Gardnerella vaginalis DNA Measurement
The determination of the amount of Gardnerella vaginalis DNA present in a sample.
Hepatitis B Virus Core Antibody Measurement
The determination of the amount of Hepatitis B virus core antibody present in a sample.
