Agree 100% with the above. That being said:
IMO, you go with the compound that has been in use medically since the early 1930's. The compound we KNOW the absolute most about scientifically. The one that has been in human bodies since day one. The compound that costs so little it is highly unlikely to be completely faked out substituted with another hormone that is unknown.
TESTOSTERONE
ANYONE who tries to sell you on the idea of taking a chemical that has been abandoned by the pharma companies with the largest vested interest in it's success is doing just that SELLING YOU. Anyone arguing that a chemical foreign to the human body that has barely been researched in humans, if at all, is way off IMO. Yes all the other options have a purpose and a use but to push any of them, even human grade approved AAS, before starting with testosterone is a mistake IMO.
Take it from the guy who started with tren pellets and insulin as his first shot you want to start this game at square one. Be safe.