I just found it this year and it has made a big difference for me in how I feel over all, better mood. I do realize that it is an AAS, however I have read that it can be used of cycle and even for PCT:
https://proviron-protection.com/proviron-in-pct/
or taken alone "Studies have shown that it’s more than possible to use the Mesterolone hormone without any significant reduction in natural testosterone production." from
https://www.steroid.com/Proviron.php
In Europe I have read that doctors prescribe it for year round use with out anything else for hypogonadism and fertility.
"Provirion won't suppress LH or FSH and will even provide your body with more free testosterone due to the fact that it binds "AGGRESSIVELY" to SHBG (lowering levels)....With this said it's not suppressive like most steroids, and your FREE T can greatly increase by allowing bound test to act in its original course of action..in lieu of being bound (freeing up bound test)" from
https://brotherhoodofpain.com/anabol...-included.html
The reason I use it while taking Test is to increase my free Testosterone and it makes me feel better. But I will refrain from advertising it. The biggest issue is that it is too expensive and hard to get in the US. Also, not legal in the US even if you have a prescription.