RAD-140 (Testolone)

Description

What is Rad140? 

RAD140, commonly known as Testolone, is a non-steroidal selective androgen receptor modulator (SARM) originally developed to investigate tissue-selective activation of the androgen receptor. The compound was initially explored for potential applications in conditions involving muscle loss, reduced bone mass, and other disorders where anabolic signaling may be beneficial. Today, RAD140 is primarily used as a research tool for studying androgen receptor pharmacology and skeletal muscle biology.

RAD140 functions by selectively binding to the androgen receptor, a nuclear receptor that regulates transcription of genes involved in protein synthesis, muscle maintenance, bone remodeling, and cellular differentiation. Compared with endogenous testosterone, SARMs are designed to produce tissue-selective activation of androgen receptors while reducing stimulation of certain androgen-sensitive tissues. However, complete tissue selectivity has not been fully established, and the biological effects of RAD140 continue to be investigated.

Studies have examined RAD140 in models of skeletal muscle physiology, bone biology, and neurobiology. Evidence suggests androgen receptor activation may influence anabolic signaling, muscle protein metabolism, and bone homeostasis.

Product Specifications

• Compound / Peptide name: RAD140 (Testolone)
• Classification: Selective Androgen Receptor Modulator (SARM); non-steroidal androgen receptor agonist
• Sequence (if applicable): Not applicable
• Form: Tablet
• Strength: 20 mg per tablet
• Purity: 98%
• Appearance: Tablet form
• Storage: Store in a cool, dry place according to supplier recommendations
• Solubility: Research-dependent
• Regulatory Status: Investigational research compound; not approved for human therapeutic use

What Is It Used For and Its Purpose 

RAD140 is primarily investigated as a research compound for studying selective androgen receptor activation and its effects on skeletal muscle, bone tissue, and endocrine physiology. Researchers utilize RAD140 to better understand anabolic signaling pathways involved in protein metabolism, muscle maintenance, and bone remodeling.

Experimental models have also explored the compound’s effects on androgen-responsive gene expression, cellular differentiation, and hormone receptor pharmacology. Because androgen receptor signaling influences multiple physiological systems, RAD140 has become a useful experimental tool in studies examining tissue-selective anabolic mechanisms.

In addition to musculoskeletal research, laboratory investigations have examined RAD140 in preclinical models of neuronal biology to better understand potential androgen receptor-mediated effects on neuronal survival and cellular stress responses.

Research Application

• Endocrinology
• Androgen receptor signaling
• Skeletal muscle biology
• Bone metabolism
• Molecular pharmacology
• Protein metabolism
• Neurobiology
• Body composition research

Potential Scientific Benefits 

Studies demonstrate that RAD140 is a potent androgen receptor agonist capable of activating anabolic signaling pathways in skeletal muscle and bone. Laboratory investigations have examined its influence on protein synthesis, muscle cell differentiation, and androgen-responsive transcriptional regulation.

Studies have reported increases in lean body mass and anabolic activity following RAD140 administration under experimental conditions. These effects are believed to result from selective activation of androgen receptor-mediated gene expression rather than conversion to estrogenic metabolites. Experimental research has also investigated RAD140 in neuronal cell models, where androgen receptor activation has been associated with cellular pathways involved in neuronal survival and resistance to certain experimental stressors. Although these findings have generated scientific interest, evidence supporting neuroprotective effects in humans is currently lacking.

Contrary to some promotional claims, available evidence does not demonstrate that RAD140 preserves endogenous testosterone production. Like other investigational SARMs, RAD140 has been associated with suppression of the hypothalamic-pituitary-gonadal axis in clinical studies. Similarly, while clinical research suggests reduced androgenic activity in certain tissues compared with anabolic steroids, claims regarding substantially lower risks of prostate effects, hair loss, or other androgen-related outcomes have not been conclusively established.

Observed biological activities in research

• Selective activation of androgen receptors
• Investigation of anabolic signaling pathways
• Regulation of skeletal muscle protein metabolism
• Effects on bone remodeling in preclinical models
• Investigation of neuronal signaling pathways
• Modulation of androgen-responsive gene expression

Molecular mechanisms reported

• Androgen receptor agonism
• Regulation of androgen-dependent transcription
• Influence on protein synthesis-related signaling pathways
• Modulation of cellular differentiation pathways

Physiological pathways involved

• Androgen receptor signaling
• Skeletal muscle protein metabolism
• Bone remodeling
• Endocrine feedback regulation
• Neuronal cellular signaling

Experimental outcomes in models

• Increased lean tissue parameters in animal studies
• Investigation of anabolic activity in skeletal muscle
• Evaluation of bone-related biological responses
• Examination of neuroprotective mechanisms in laboratory models

Current evidence remains limited, and further well-controlled clinical studies are required to establish long-term efficacy and safety in humans.

Research Data Sheet 

• Compound / Peptide name: RAD140 (Testolone)
• Sequence (if applicable): Not applicable
• Classification: Selective Androgen Receptor Modulator (SARM)
• Molecular Formula: Not available
• Form: Tablet
• Appearance: Tablet form
• Purity: 98%
• Solubility: Research-dependent
• Storage: Store in a cool, dry place according to supplier recommendations
• Research Categories: Endocrinology, androgen receptor signaling, skeletal muscle biology, bone metabolism, neurobiology, molecular pharmacology

Safety Precautions 

RAD140 is supplied exclusively for laboratory research and should be handled only by qualified personnel using established laboratory safety procedures. Investigational studies have reported effects on endocrine function, making careful laboratory handling, documentation, and storage essential throughout research activities.

• Research use only
• Not for human consumption
• Not intended to diagnose, treat, or prevent disease
• Wear appropriate personal protective equipment, including gloves, laboratory coat, and eye protection
• Follow aseptic laboratory handling procedures where appropriate
• Store under recommended laboratory storage conditions
• Avoid unnecessary freeze–thaw cycles where applicable
• Maintain accurate labeling and documentation
• Dispose of waste according to institutional and regulatory laboratory requirements
• Limited human safety data available
• Potential unknown long-term biological effects

Conclusion 

RAD140 (Testolone) is an investigational selective androgen receptor modulator that has become an important research compound for studying androgen receptor pharmacology, skeletal muscle physiology, bone biology, and anabolic signaling. Its selective interaction with androgen receptors has made it valuable for exploring tissue-specific regulation of anabolic pathways.

Although preclinical findings demonstrate biological activity involving muscle, bone, and neuronal pathways, comprehensive clinical evidence supporting long-term efficacy and safety remains unavailable. RAD140 continues to contribute to translational biomedical research aimed at understanding selective androgen receptor modulation and its physiological consequences. Further well-designed clinical studies are required to fully characterize its pharmacology, endocrine effects, and long-term safety profile.