@s2208 Easiest place to buy perfect bioidentical testosterone is "lift heavy things" and get good sleep. The body adapts to its demands.

The following assumes one has all of the valid import/manufacturing licenses and/or prescriptions necessary for these to be 100% legal.

There is an entire culture of people using steroids (including plain testosterone) in bodybuilding, and there are online lists of suppliers along with reviews. They are typically shipped in from outside the country. Same places that supply roids will also supply blue pills.

That said, unless really truly needed, I'd caution against it. Using exogenous testosterone shuts down your body's ability to make it, making you dependent on outside sources (similar to a tranny) which is never a good place to be in a very unsettled world if avoidable.

You can buy pure cholesterol online cheap, and making testosterone from cholesterol is a standard synthesis in older organic chemistry college lab textbooks.

To make it clean enough to inject (mixed with sunflower oil), you can buy sterile ampules online, syringes and syringe filters. Syringe filters will remove any bacteria.

Again, all the above assumes all licenses etc needed to make this legal are in place.