Testolone (RAD-140)

**Class:** SARM (Selective Androgen Receptor Modulator)

Selective Androgen Receptor Modulators (SARMs) are a class of therapeutic compounds with similar anabolic properties to anabolic steroids but with reduced androgenic activity. This article compares YK-11 and RAD-140 (Testolone), two of the most potent compounds currently discussed in sports pharmaco

Selective Androgen Receptor Modulators (SARMs) were developed to provide the therapeutic benefits of androgen replacement therapy—such as increased muscle mass and bone density—while minimizing the adverse effects associated with conventional anabolic-androgenic steroids (AAS), specifically prostate

Selective Androgen Receptor Modulators (SARMs) were developed to provide the anabolic benefits of traditional androgenic-anabolic steroids (AAS) while minimizing detrimental effects on the prostate, skin, and hair. Enobosarm (Ostarine) and Testolone (RAD-140) represent two of the most researched com

YK-11 (17α,20E)-17,20-[(1-methoxyethylidene)bis(oxy)]-3-oxo-19-norpregna-4,20-diene-21-carboxylic acid methyl ester is a synthetic compound classified as a Selective Androgen Receptor Modulator (SARM). Unlike traditional non-steroidal SARMs such as Ostarine or Ligandrol, YK-11 possesses a steroidal

Testolone (RAD-140) is a potent, non-steroidal selective androgen receptor modulator (SARM) originally developed by Radius Health, Inc. It was designed to overcome the limitations of conventional androgen therapy, such as prostate enlargement and virilization, by exhibiting high tissue selectivity.

Andarine (also known as S-4 or GTx-007) is an early-generation, nonsteroidal selective androgen receptor modulator (SARM) belonging to the aryl propionamide class. Developed initially for the treatment of conditions such as muscle wasting and osteoporosis, Andarine demonstrates high affinity for the