you got it backwards.
your question should be why is all the other stuff necessary along side the serm.
you can run a decent pct with just a serm, but you cant really do sht with the rest of that stuff, unless you use a bunch of products, that increase test in different ways, control estrogen, and keep cortisol low so your body stays in an anabolic state.
a serm will increase testosterone production as well as preventing estrogen from binding to, and interacting with the estrogen receptors.
compounds like pct assist, daa, aromatase inhibitors all increase testosterone via different means some indirectly, others directly.
cortisol control compounds lower cortisol which is a catabolic (break down larger molecules for energy) hormone. you want to keep your androgens higher than cortisol in order to keep you body in an anabolic state.
you can get by with just clomid, or you can even run no pct (wouldn't recomend it), or you can go all over the counter, but the best way to keep those hard earned gains you're so proud of, is to use both a serm and otc products in order to maximize recovery back to normal or above normal levels.
:thumbsup:
edit: oh yea, you also have another option, and that is to never use steroids or pro hormones, and just be happy with what mommy and daddy gave you. this way will save you a bunch of $$$$. and you can tell people your all natural, and not be lying.
