Testosterone, By Decade

Summary

Total T declines ~1% per year after age 30; bioavailable T falls faster because SHBG rises with age.

Takeaway

Sleep restriction, visceral adiposity, and untreated sleep apnea accelerate the decline beyond chronological aging.

Citations · 1

1. [01]
   Travison TG et al. (2017). Harmonized reference ranges for circulating testosterone levels. JCEM. doi:10.1210/jc.2016-2935
   Source