It prevents osteoporosis and can be used as doping (due to speeding up metabolism, energy output, and affecting the cardiovascular system), as well as medication against breast cancer.

Trans men do not use testosterone for those purposes, and instead generally want to transition. They may or may not wish for testosterone. One reason it’s hard to access is: sports doping, thus affecting the unrelated queer communities.

For sport doping, though, there are other means, such as anabolic steroids (which are structurally similar to testosterone though aren’t necessarily the same), and stimulants such as caffeine, modafinil, and so on. Extracting one’s own blood and then injecting it later (when the body has made new blood cells already) is also done, as well hyperbaric chambers and gene doping.

Doping is well-controlled for at sports’ competitions, so that shouldn’t be a large issue.

---

There’s been research in normal testosterone levels - those decrease gradually with age, from:

• 21 nmol/L total (with 0.4 free T nmol/L) at the age of 25-34,
• to 13 nmol/L total and 0.2 free T nmol/L) at the age of 85-100

source here

---

Transmasc people who are on T generally showcase similar rates of testosterone/estrogen as that of cismasc people.

Banning or heavily restricting access to testosterone, therefore wouldn’t be meaningful - so why is it then done?