Yup, its called HRT. I can tell you the effects its had on me. I'm 37 and went on HRT this year. It allows me to remain big and lean at the same time. Somewhere in my mid 30s especially after my vasectomy this was no longer possible. HRT changed that. Now I'm mid 250s with abs. I never maintained that weight with abs before. In my 20s I would always slip down into 240s to get abs. Now, they're not shredded abs, but, they are there. However, to maintain this condition I MUST be right on with the diet. High protein, moderate fat and low carbs. Plus cardio 4x per week. And hard training of course. My current belief is that HRT will extend your abiity to look good and train hard much later in life. Based on ironmasters comments, I suspect then to continue to have a physique like your 20s into your 50s you then may have to go to GH and maybe slin, but, thats another topic.
Also, I am making slow but steady gains post cycle. Just as much as I made on cycle. My next cycle I plan to go with a lower dosage than before. This HRT experience has furthered my understanding that its not drugs that do it, but, consistency in training & nutrition over the long haul. This game is definitely a marathon, not a sprint.