Mega as usual has nailed it on your best practices. I'll add that I've added Deca to my TRT for 24 weeks now at 200mg a week. This was my first time using a 19-nor compound so even at this dosage I was concerned about my bodies reactions so I changed from using zinc/copper and DIM to control my E2, to a standard dosage of arimadex. At first I drove it into the dirt, then lowered my arimadex dose to get in a better range. Bottom line is in that time, my joints feel better, I can run farther and faster than I ever could before, I was able to up my lifts in the gym when not running a calorie deficit. And my body is looking the best it's ever been. I still have about 6 more months of dieting, training, and recomposition, ahead of me, but I can see where I'll end up and it's exactly what I have been working towards. TRT changed my life, adding Deca at a reasonable dosage changed my TRT. Concerning lab work, I noticed a big jump in free T after about 6 weeks of deca, and a slight increase in total T. That was about it. I lowered my Test cyp dose by ~10% (180mg weekly down to 160) 3 weeks out from my MD testing and I was in range, but just barely. Always get your own labs before your doctor visit. That is not a place for surprises.