First lets look at average .
The following total and free testosterone ranges, indicate the downwards trend as men age.
Average Hormone Levels by Age in Men
Unit Conversion Calculator
Vermeulen, A. (1996). Declining Androgens with Age: An Overview. In Vermeulen, A. & Oddens, & B. J. (Eds.), Androgens and the Aging Male (pp. 3-14). New York: Parthenon Publishing. Measurements in SI Units
Age Total T
(nmol/L)Free T
(pmol/L)SHBG
(nmol/L)DHEA-S
(umol/L)Estradiol
(pmol/L)25-34 21.4 428 35.5 6.4 137 35-44 23.1 356 40.1 6.0 134 45-54 21.0 314 44.6 4.8 142 55-64 19.5 288 45.5 3.2 129 65-74 18.2 239 48.7 2.6 132 75-84 16.3 207 51.0 1.2 139 85-100 13.0 186 65.9 1.2 136
Measurements in Conventional Units Testosterone Level Ranges by Age (Non-Diabetic)
Age Total T
(ng/dl)Free T
(pg/ml)SHBG
(ug/ml)DHEA-S
(ug/dl)Estradiol
(pg/ml)25-34 617 123 4.0 236 37.3 35-44 668 103 4.5 221 36.5 45-54 606 90 5.0 177 38.7 55-64 562 83 5.1 118 35.1 65-74 524 69 5.5 96 36.0 75-84 471 60 5.7 44 37.9 85-100 376 54 7.4 44 37.1
Simon, D., Nahoul, K., & Charles M.A. (1996). Sex Hormones, Aging, Ethnicity and Insulin Sensivity in Men: An Overview of the TELECOM Study. In Vermeulen, A. & Oddens, and B. J. (Eds.), Androgens and the Aging Male (pp. 85-102). New York: Parthenon Publishing. Measurements in SI Units
Age Average
Total Testosterone
(nmol/L)5th Percentile
Total Testosterone
(nmol/L)95th Percentile
Total Testosterone
(nmol/L)< 25 24.2 14.2 33.1 25-29 22.1 13.5 34.8 30-34 20.7 12.1 33.8 35-39 19.7 11.4 32.8 40-44 20.7 11.0 32.4 45-49 18.3 11.4 29.3 50-54 17.9 10.0 32.4 55-59 19.0 11.0 30.0
Measurements in Conventional Units Male Testosterone Levels in an Unhealthy Population
Age Average
Total Testosterone
(ng/dl)5th Percentile
Total Testosterone
(ng/dl)95th Percentile
Total Testosterone
(ng/dl)< 25 697 408 956 25-29 637 388 1005 30-34 597 348 75 35-39 567 329 945 40-44 597 319 936 45-49 527 329 846 50-54 518 289 936 55-59 547 319 866
Depending on the lab your doctor uses, male testosterone levels typically range between 250ng/dl and 850 ng/dl.
As you may well imagine, these ranges are not set to optimal levels. They are from a cross section of men aged 20 to 80; many of whom may be sick or diseased, from a lifetime of unhealthy habits.