Does anyone take this shit? This infantryman who had a desk job as a recruiter (no longer) gave me some and I'm debating to take it, but need some insight. I heard some crazy shit and I know it's sole purpose is to speed your metabolism but this dude was a fucking beast (would do 100 push ups randomly for no reason).

http://www.gnc.com/product/index.jsp?productId=4098584

most effective for women when I went to GNC, but I want some insight other than from my recruiters and some reviews.