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 Viral Load PCR Measurement
The determination of the HIV viral load in a specimen using polymerase chain reaction.
Chymotrypsin Measurement
The determination of the amount of chymotrypsin present in a sample.
Monocytoid Cell to Total Cell Ratio Measurement
The determination of the ratio of the monocytoid cells compared to total cells present in a sample. The measurement may be expressed as a ratio or percentage.
Pancreatic Amylase Measurement
The determination of the amount of pancreatic amylase present in a sample.
Helper T-Lymphocyte Subpopulation to Helper T-Lymphocyte Ratio Measurement
The determination of the ratio of a sub-population of helper T-lymphocytes to total helper T-lymphocytes present in a sample. The measurement may be expressed as a ratio or percentage.
Inorganic Pyrophosphate Measurement
The determination of the amount of inorganic pyrophosphate present in a sample.
Anti-Double Stranded DNA Measurement
The determination of the amount of anti-double stranded DNA present in a sample.
Creatine and Choline Measurement
The determination of the amount of creatine and choline present in a sample.
Non-Classical Monocyte to Myeloid Cell Ratio Measurement
The determination of the ratio of monocytes non-classical to myeloid cells present in a sample. The measurement may be expressed as a ratio or percentage.
Mature Natural Killer Cell to Lymphocyte Ratio Measurement
The determination of the ratio of the mature natural killer cells to total lymphocytes present in a sample. The measurement may be expressed as a ratio or percentage.
Lithocholate Measurement
The determination of the amount of lithocholate in a sample.
Myeloid Cell to Leukocyte Ratio Measurement
The determination of the ratio of Myeloid cells to Leuk present in a sample. The measurement may be expressed as a ratio or percentage.
Natural Killer Cells to Leukocytes Ratio Measurement
The determination of the ratio of the natural killer cells to leukocytes present in a sample. The measurement may be expressed as a ratio or percentage.
Factor V Activity Measurement
The determination of the amount of the biological activity of factor V in a sample.
Giardia lamblia Antigen Measurement
The determination of the Giardia lamblia antigen present in a sample.
EUROIMMUN Anti-SARS-CoV-2 ELISA IgG Serology Assay
A proprietary enzyme-linked immunosorbent assay for semi-quantitative detection of IgG antibodies against SARS-CoV-2 using the S1 domain of the spike protein, including the receptor binding domain (RBD).
Bicarbonate Measurement
The determination of the amount of bicarbonate present in a sample.
Beta Alanine Measurement
The determination of the amount of beta alanine present in a sample.
Procollagen 3 N-Terminal Propeptide Measurement
The determination of the amount of procollagen 3 N-terminal propeptide present in a sample.
Dietary Saturated Fat Measurement
The determination of the amount of saturated fat in a nutritional product or meal, or a portion thereof.
Glutamic Acid Decarboxylase 2 Antibody Measurement
The determination of the amount of glutamic acid decarboxylase 2 antibody present in a sample.
Malignant Cell Count
The determination of the number of malignant cells present in a sample.
Double-Negative B-Lymphocyte Subpopulation to B-Lymphocyte Ratio Measurement
The determination of a sub-population of double negative B-lymphocytes to B-lymphocytes in a biological specimen
Low Absorption Reticulocytes to Total Reticulocytes Ratio Measurement
The determination of the ratio of low absorption reticulocytes compared to total reticulocytes present in a sample. The measurement may be expressed as a ratio or percentage.