while reading bountiful breast's site I noticed that they say that thier formula increases aromatization (conversion of testosterone to estrogen) and that its not necessary to block androgens, but then reading futher on the page they say that stubborn cases may require spironolactone which IS an androgen blocker........Now I'm really confused, if BB does in fact increase the aromatization process wouldn't that process decrease on androgen blockers.
anyone here have an opinion on why they would suggest that.

Not quite so! Androgen blockers can aid the aromatization process.
I geuss what they're saying is stuborn cases,meaning people with extra high levels of testosterone in their system, have a hard time getting the estrogen to bind to the estrogen receptors. If you're feminizing,testosterone can be a nasty opponent to beat.
Most TG/TS girls take an anti-androgen with their estrogen! This increases the feminizing process and they get much better results. Some of the girls get castrated to block the androgens, and this means that they can lower their Estrogen dose because there isn't the production of testosterone to compete with the estrogen.
Phew! Hope this helps?

Blu-Jay