
Originally Posted by
sitries
hi mate - iv hadthe same dilemma for the last week! i was going to do 500mg test and 400ml deca. its my 1st cycle and like you im v worries about MPB. im going to be usinf finasteride to combat the problem of DHT conversion with the test. however iv now decided to drop the deca because of the confusion about whether it can or canat be used with finasteride - the last thing i wanted to do was speed up th process!
having said this - i just decided to air on the side of caution! the post below however states that it is a myth that you can use test and deca with finasteride - and it seems to make scientific sense aswel! I just wasnt prepared to go on what just 1 person told me.
Originally Posted by einstein1905
"I heard you can't use finasteride with deca"
Without fail, you'll hear this statement at least once a month.
First off, let me preface this by saying that this is true, in certain contexts.
However, I'm an advocate of including testosterone in every cycle, so my explanation is with the assumption that one will be using nandrolone in addition to testosterone
For those that do not know, testosterone converts to DHT via the 5 alpha reductase enzyme. DHT is far more androgenic than testosterone and is the main contributor to MPB in those genetically predisposed.
Finasteride is a 5 alpha reductase inhibitor, and therefore limits the conversion of testosterone to DHT via competitive inhibition.
Nandrolone itself is a 5 alpha reductase inhibitor (although it yields DHN in the process). So less DHT is produced if nandrolone is present. Also, DHN is much less androgenic than nandrolone and much less androgenic than DHT. So, finasteride with deca (nandrolone) should both work to reduce DHT levels, and since finasteride will inhibit 5a reductase, it'll also keep levels of DHN lower too.
The misconception that deca with finasteride is a bad combination stems from the the days when deca only cycles were more common (often referred to as the days before jason updated the AR homepage cycles ) If one were running a deca only cycle (or any deca cycle without test), then finasteride would be a poor choice, because DHN is less androgenic than nandrolone. However, since we're assuming test to be included in a deca cycle, and both test and DHT are far more androgenic than nandrolone, if your goal is preventing the formation of the most androgenic compounds, then both deca and finasteride work together to reduce DHT formation.
To sum things up, if you're running a test + deca cycle and are worried about MPB (and you're susceptible), then including finasteride is a far better option than NOT including it, although the nandrolone will help to reduce DHT formation on its own to some extent.