So pleased to see this question. I have been wondering this myself as well. I'm on properly prescribed trt too. Was wondering how long a break to take before labs for say testP or trenA. From guys that have ACTUALLY done this (and only concerned with test level.)

Surely there's plenty, but there's no real literature, and I only found one person on reddit commenting 4 weeks with testP. There's a lot of theories going round, but as an ex-pharmacist I see A LOT of misinformation on topics I am confident on!