Paul metropolitan area during the 2009 - 2010 school year to a series of five
questions about muscle - enhancing behaviors, two healthy (changing eating patterns and exercising more) and three unhealthy (using protein powders or shakes, taking steroids, or employing another muscle - building substance such as
creatine, amino acids, HMB, DHEA, or growth hormone), researchers at the University of Minnesota and Columbia University found that almost all students surveyed (90 % of boys, 80 % of girls) reported doing at least 1 behavior with this as the goal, and up to one - third reported the use of unhealthy methods.