A nationwide survey of more than 10,000 adolescents, published in the
August issue of Pediatrics, reports a high rate of concern about body
image in both boys and girls, and finds that adolescents with such
concerns are much more likely to use hormones and dietary supplements
to enhance their physique.
The most commonly used products were protein powders and shakes.
Others, used predominantly by boys, included creatine, amino acids, the
amino-acid metabolite HMB, the hormone dehydroepiandrosterone (DHEA),
growth hormone, and anabolic steroids.
Anabolic steroids have the most serious health effects, including
testicular atrophy, impotence, liver and kidney damage, an increased
risk for heart disease, and the widely reported "'roid rage"
(uncontrolled aggression). The safety of creatine, DHEA, and other
products purported to increase muscle mass and tone has been questioned
and isn't well known.
http://www.medicalnewstoday.com/medicalnews.php?newsid=28439