Historical Article - A Brief History of Testosterone
http://www.usrf.org/news/TRT/Freeman,%20J.Urol.,%202001.pdfLooks like over 12,000 physicians were shooting people up on a mass scale up with animal extracts which contained low concentrations of testosterone as early as 1889. (which is when Eugene Sandow was 22 years old BTW)
hypodermic syringe circa 1880
draw your own conclusions - this goes deeper than any of us realize - how far down the rabbit hole do you guys want to go???
The Schering Corporation and Organon were sponsoring the development of a synthetic version between 1935-1939, so injectable synthetic testosterone was fully available to a very eager market via Organon and Schering as early as 1940.
Of course it was used right away by bodybuilders in 1940 -people had already been shooting up primitive forms of it for 51 years at that point!
Sorry I just had give this post it's own thread. Discuss.