if you dont feel comfortable taking it, dont take it. Personally, I would avoid any supplements that claim to mess with hormones. If you are putting in a hard heavy weight work out in, ur body will produce the necessary hormones to grow.
2015 - m4 - hopefully
2011 - 335is e92 - Cobb PTF E40/Rob Beck/AR/Helix (458 rwtq and 479 rwhp - @ 17 psi and 6,000 rpms)
2007 - 911 Turbo - EP1/AMS (617 awtq and 500 awhp) - Retired
2008 - 335i e92 - Cobb/AR/Helix/OSS (384 rwtq and 356 rwhp) - Retired
2003 and 2005 330i/ci zhp - Stock - Retired