My understanding is people who make hardware upgrades to their body:
- ametur surgery to add a magnet to your index finger
- taking eye enzymes from cave fish and injecting it into a friends eye rk get short term super night vision
- attaching two prosthetic legs that makes you run faster and longer
- open source hardware and software for an artificial pancreas
Stuff like that
Testosterone is a hormone. Excess testosterone causes heart issues. (I am not familiar all with current steroids). Injecting crap into eyes can easily cause damage. Ametur surgery has a lot of scarring. Deaths from feedback loops of a diabetic coma with artificial kidneys happen. There is a lot of risk with “bio hacking” and a lot of “supplements” are either dangerous or snake oil