Laboratory testing for testosterone or any of its known metabolites may be done by antibody based screening like ELISA. Liquid Chromatography can also be performed while TLC may help in low cost preliminary analysis. A MS/GC based analysis may be used as a confirmatory test for validation purposes. All these tests can be done either on blood samples or urine samples or even on hair follicle samples. However, for periodic monitoring purposes many rapid screening kits are available commercially for home use.