Seriously if she's so fuckign dead set on using it, what the hell does she herself know about it??? If she's dumb enough to inject it - let her. Even if someone at her gym told her how fucking great it is, did she at least take the time to research it herself??????
Goddammit. FUCK SHIT FUCKIGN GODDAMMM.
Sorry. Dude - its great you are looking to give her some help w/ this, but you might also at least tell her that she better fuckign well know for herslef what she's putting in her body before she does it. Its not rocket science and there's information all over the web about it. So I'm just going to hope she's taking the initiative to educate herself. Whether it turns out great for her or she completely fucks herself, she better know enough to make a reasonable decision about it.
Tell her I said that too.