Running tren ace at 350mg/week. Everyone on the forums says to run caber alongside it to keep prolactin in check, so I started at 0.5mg twice a week from day one. Felt great for the first two weeks -- libido was through the roof, felt like a god. Classic caber effects.
Then things went sideways around week 3. Started having trouble sleeping. Not the tren insomnia everyone talks about -- something different. I would fall asleep fine but wake up at 3 AM in a state of near-panic. Heart racing, feeling of dread, like something terrible was about to happen. During the day I felt emotionally flat. Not depressed exactly, but like the volume on my emotions had been turned way down. Music did not hit the same. Movies did not move me. Sex was mechanically fine but emotionally empty.
Got bloodwork. Prolactin was literally undetectable -- less than 1 ng/mL. The lab flagged it. Dropped the caber entirely and within about 10 days, the anxiety subsided and emotions started coming back. Lesson learned: prolactin is not supposed to be at zero. Your body needs some. The forums make it sound like you should just nuke it, but there is a floor below which things get weird.
Now I run caber at 0.25mg once a week on tren and check bloods regularly. Prolactin sits at 5-7 ng/mL which is where I feel best. Dose by bloodwork, not by forum bro-science.