I have kleinfelter syndrome, which means my body does not produce Testosterone, or very little anyway. I only found out at 38. I’ve had a pretty advanced internal monologue all my life, what the lack of T did give me was insulin resistance, major depression, and generalized anxiety. The latter 2 disappeared almost instantly after my first Testosterone injection. Depression was like a constant weight pushing down on me, the next morning I woke up without the weight, and without the worry about everything. And it was very weird.