Compared to indirect, multi-step testing algorithms, FDA-cleared, single-step, direct ELISA measurement of Free Testosterone from Gold Standard Diagnostics (GSD) can help clinical laboratories save time and money, while reducing the possibility of errors. The ability to directly measure Free Testosterone eliminates the complication of taking multiple indirect measurements and calculating Free Testosterone through an algorithm. GSD also offers an ELISA test for Total Testosterone levels to complement the Free Testosterone assay. The combination of Free and Total Testosterone gives health care professionals more information to make the correct diagnosis when a testosterone-related condition is suspected.