I am 41 and have been on TRT for exactly one year and have made tremendous gains until the last few weeks. I work out as hard or harder as I always have, but my body hit a wall. My protocol is 200mg Test C weekly, .015ml Sermorelin daily, 0.5ml Progesterone daily, 2000 mg L-Arganine daily, 5 mg of Cialis daily and 1 mg Arimidex split in 2 doses weekly. I have been what I thought super dialed in for the last 10 months and feeling awesome. I still feel great and am still very strong, but am not getting any stronger or loosing any more body fat.