The Spanish Commission for the Fight Against Doping in Sport warns about the use of so-called SARMs., 

Selective Androgen Receptor Modulators, or SARMs, are chemical substances that have effects similar to testosterone and other anabolic steroids.

The Spanish Commission for the Fight Against Doping in Sport reminds everyone that these substances are not authorized for human use and are prohibited in the field of sport.

More information below, in the Related Links section.