RAD-140, also known as Testolone or Vosilasarm, is an investigational selective androgen receptor modulator (SARM). It was developed to selectively interact with androgen receptors and has been studied for potential anabolic effects, including effects on muscle tissue. Early research has generated interest in RAD-140 for several applications, but it is important to distinguish potential research benefits from proven effects in humans.
What Is RAD-140?
RAD-140 is a nonsteroidal SARM designed to activate androgen receptors selectively. Unlike traditional anabolic steroids, SARMs were developed with the aim of producing more targeted androgen receptor activity in certain tissues.
Research into RAD-140 has included preclinical studies examining its anabolic properties, as well as clinical research investigating its potential as an androgen receptor-targeted treatment. However, RAD-140 remains an investigational compound and is not an FDA-approved dietary supplement or treatment.
Potential Benefits of RAD-140
The potential benefits associated with RAD-140 primarily come from preclinical research and its mechanism of action. Anyone researching rad 140 should consider the distinction between experimental findings and established clinical benefits.
Can RAD-140 Increase Muscle Mass?
One of the main areas of interest surrounding RAD-140 is its potential effect on lean muscle tissue. Preclinical research has found anabolic activity associated with RAD-140, including effects on skeletal muscle. A 2025 study in rats investigated whether RAD-140 could contribute to muscle hypertrophy when combined with functional muscle overload.
These findings help explain why RAD-140 has attracted interest in research involving muscle growth and muscle wasting. However, animal studies cannot establish that the same effects will occur in healthy humans.
Can RAD-140 Improve Strength and Physical Performance?
Because androgen receptor activity is involved in muscle development and function, researchers have also investigated whether compounds such as RAD-140 could influence physical performance.
Research in animal models has examined RAD-140 in relation to muscle strength and recovery. However, results from animal studies should not be interpreted as evidence that RAD-140 improves strength or athletic performance in humans. The FDA has specifically warned that SARMs are promoted online for increasing muscle mass and athletic performance despite not being approved for these uses.
Can RAD-140 Help Preserve Muscle During Muscle Loss?
Another potential research application involves maintaining lean body mass during conditions associated with muscle loss. The original research into RAD-140 included preclinical models of anabolic androgen activity and muscle wasting, which contributed to interest in its potential therapeutic applications.
This does not mean RAD-140 is an established treatment for muscle wasting. More clinical research is needed to determine whether its potential effects can translate into safe and effective medical applications.
Does RAD-140 Have Potential Benefits for Bone Health?
Androgen receptor signalling also plays a role in bone tissue, making SARMs an area of interest in research into musculoskeletal conditions. The potential for selective androgen receptor activity to influence bone and muscle has contributed to broader research into SARMs for conditions involving loss of lean tissue and bone strength.
At present, however, there is not enough evidence to describe RAD-140 as an established treatment for bone-related conditions.
How Does RAD-140 Compare With Other SARMs?
RAD-140 is one of several SARMs that have been investigated for anabolic activity. Research has explored its ability to activate androgen receptors while producing selective effects in different tissues.
Its research profile is different from other SARMs, and comparisons based solely on anecdotal reports can be misleading. Differences in study design, dosage, animal models and research objectives make it difficult to determine whether one investigational SARM is definitively more effective than another.
What Does the Research Say About RAD-140?
Research into RAD-140 has produced findings that warrant further investigation, particularly in relation to androgen receptor activity, muscle tissue and potential therapeutic applications. Preclinical studies have demonstrated anabolic effects, while a first-in-human Phase 1 clinical study investigated RAD-140 as an androgen receptor-targeted agent in people with advanced breast cancer.
However, research also highlights potential safety concerns. A published case report associated RAD-140 use with severe liver injury, while clinical research has reported changes in liver-related laboratory markers.
Are the Potential Benefits of RAD-140 Proven?
The potential benefits of RAD-140 should be viewed in the context of its limited research history. Evidence from laboratory and animal studies can help researchers understand how a compound works, but it does not establish that the same benefits will occur in humans.
RAD-140 is not FDA approved, and the FDA has warned consumers about the risks associated with using SARMs for muscle growth, physical appearance or athletic performance.
Frequently Asked Questions
Can RAD-140 increase muscle mass?
Preclinical research suggests that RAD-140 has anabolic effects on muscle tissue, but these findings do not establish a proven muscle-building benefit in healthy humans.
Can RAD-140 improve strength and physical performance?
RAD-140 has been investigated for effects related to muscle function, but there is insufficient clinical evidence to establish it as a safe or effective performance-enhancing compound.
Can RAD-140 help preserve muscle during periods of muscle loss?
Its anabolic activity has generated research interest in conditions involving muscle loss, but RAD-140 is not an established treatment for muscle-wasting conditions.
Does RAD-140 have potential benefits for bone health?
Androgen receptor activity is relevant to bone biology, but more research is required to determine whether RAD-140 has meaningful therapeutic applications for bone health.
How does RAD-140 compare with other SARMs for muscle growth?
RAD-140 has demonstrated anabolic activity in preclinical research, but there is insufficient evidence to reliably rank it against other SARMs for muscle growth in humans.
Final Thoughts
RAD-140 has attracted scientific interest because of its selective activity at androgen receptors and its potential anabolic effects. Research has explored areas including muscle growth, muscle preservation and other applications involving androgen signalling.
However, most evidence remains preclinical, and potential research benefits should not be confused with proven human health or performance benefits. Further clinical research is needed to establish the effectiveness, safety and appropriate applications of RAD-140.
