RAD-140, also known as testolone or radarine, is a Selective Androgen Receptor Modulator (SARM) that is gaining notoriety. RAD-140 has been detected in athletes internationally and recently in Australia. Like other SARMs, RAD-140 is included in the Prohibited List as a banned substance for all athletes. It is also covered by the Australian Poisons Standard and accessing it without authority is illegal.

There have been multiple case studies of liver failure in people using RAD-140, while other SARMs have been associated with impacts on vision. Additionally, there is no standardisation on the dosages required and the products themselves have come under scrutiny in multiple studies.