Testosterone,Free and Total Testosterone, Serum 343 ng/dL 264 - 916 01 Adult male reference interval is based on a population of healthy nonobese males (BMI <30) between 19 and 39 years old. Travison, et.al. JCEM 2017,102;1161-1173. PMID: 28324103. Free Testosterone(Direct) 11.8 pg/mL 6.8 - 21.5...