Test Specifications

All testing performed at ZRT Laboratory is done to high standards of accuracy and uses state-of-the-art methodology. Tests are validated with internal and/or external controls.

Click on each of our commercial tests listed below for the Test Specifications, including assay method, intra- and inter-assay precision, accuracy, analyte stability and general information.

• Please inquire about additional tests not listed below.
• We test a comprehensive range of steroid metabolites in dried urine with creatinine correction.
• Note that steroid assays in saliva for research purposes can be performed by mass spectrometry.
• DBS = dried blood spot (capillary blood sampled via finger stick).

 Analyte

 Sample Type

 Estradiol 

 SalivaDBS 

 Progesterone 

 SalivaDBS

 Testosterone 

 SalivaDBS

 DHEA sulfate 

 SalivaDBS

 Cortisol 

 SalivaDBS

 Estrone 

 Saliva

 Estriol 

 Saliva

 SHBG

 DBS

 25-hydroxy Vitamin D2/D3

 DBS

 Thyroglobulin

 DBS

 Thyroxine (T4), total

 DBS

 Free T4

 DBS

 Free T3

 DBS

 TSH 

 DBS

 TPO antibodies

 DBS

 Cholesterol, total

 DBS

 HDL cholesterol

 DBS

 Triglycerides

 DBS

 Hemoglobin A1c

 DBS

 Insulin

 DBS

 Hs-CRP

 DBS

 LH

 DBS

 FSH

 DBS

 PSA

 DBS

 IGF-1

 DBS

 Lead

 DBS

 Iodine 

 Urine

 Selenium

 Urine

 Bromine

 Urine

 Arsenic

 Urine

 Cadmium

 Urine

 Mercury 

 Urine

 Creatinine

 Urine