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 - Cayman GTS - Stock
2011 - 335is e92 - Cobb PTF E40/Rob - Beck/AR/Helix (458 rwtq and 479 rwhp) - Retired
2007 - 911 Turbo - EP1/AMS (617 awtq and 500 awhp) - Retired
2008 - 335i e92 - Cobb/AR/Helix/OSS (384 rwtq and 356 rwhp) - Retired