Iron Bull Edge For the past 20 years, supplement companies have used Iron Bull Edge as a testosterone booster claiming it to have muscle building properties. The question is whether or not Iron Bull Edge actually 1) Elevates testosterone levels; And 2) Improve overall body composition and strength levels. At the end of the study, there was no significant differences in testosterone levels between the control groups and Iron Bull Edge supplemented groups. All results were in the normal range.>>>>http://www.supplementsauthority.com/iron-bull-edge/