Does testosterone therapy(gel) works in "adjunction" with body's normally produced testosterone? or, does it stop and replace the normal testosterone?

Your own TEST stops: With shots, gels, creams, patches of Testosterone your own testicular testosterone will come to a temporary stand still. Depending on how long it is depressed your testes can start up again. After 2-3 years they may not respond well again. This is one reason for not taking T as a youngster . In the older male. 50. Plus it will not make as much difference . T at any age needs careful attentio