I talked to my doctor, who is an older cyclist. I got a blood draw, he said my T is normal for my age and strongly advised against supplementing with it. Too many downsides. The weight room will raise your T, so get after it.

My CABG was near the end of April and it's taken me until a month ago to get back in the gym regularly. Now I'm in there twice a week, 2-3 hours total. My muscularity is already noticeably increasing as is my power on the bike. Seems to be OK. I should mention that I supplement with about everything that's been shown to be effective in clinical trials, just not T. HMB definitely increases muscle growth but only in geezers, not kids.