S23

S-23 Product Description — Research Use Only

S-23 is a research compound studied as a selective androgen receptor modulator, commonly known as a SARM. It is not a peptide, but it is often grouped within peptide and research-compound catalogs because of its use in androgen-receptor, anabolic-pathway, lean-mass, bone-support, and reproductive-axis research.

Research on S-23 has most commonly focused on androgen receptor activity, tissue-selective anabolic signaling, muscle-support pathways, bone-support research, hormone-response markers, and reproductive-axis signaling. Published preclinical research describes S-23 as a selective androgen receptor modulator studied for androgen receptor binding, tissue activity, and hormonal male contraception models.

S-23 is commonly studied for:

• Androgen receptor activity — how the compound interacts with androgen receptor pathways

• Muscle-support pathways — signals connected to muscle maintenance, repair, and protein balance

• Lean-mass research — markers related to lean tissue and body-composition changes

• Bone-support pathways — research involving bone strength, density, and maintenance

• Tissue selectivity — how activity may differ between muscle, bone, and other tissues

• Hormone-response markers — how androgen-related pathways influence biological signaling

• Reproductive-axis research — how androgen signaling may affect LH, FSH, testosterone, and fertility-related markers

S-23 is commonly studied because SARMs are designed to activate androgen receptor pathways in a more tissue-selective way than traditional steroidal androgens. In published preclinical research, S-23 was evaluated for androgen receptor activity and reversible reproductive-axis effects when combined with estradiol benzoate, making it relevant for studies involving androgen signaling, tissue selectivity, endocrine feedback, and male-fertility-related research models.

For research use only. Not for human consumption, medical use, diagnostic use, or therapeutic application.