http://www.cfsan.fda.gov/~dms/dsandro.html
Center for Food Safety and Applied Nutrition, U.S. Food and Drug Administration
HHS Secretary Tommy G. Thompson today announced a crackdown on companies that manufacture, market and distribute products containing androstenedione, or, "andro," which acts like a steroid once it is metabolized by the body and therefore can pose similar kinds of health risks as steroids. These products are generally advertised as dietary supplements that enhance athletic performance based on their claimed anabolic and androgenic properties to stimulate muscle growth and increase production of testosterone.