YK-11
YK-11 Product Description — Research Use Only
YK-11 is a research compound studied for selective androgen receptor activity and muscle-cell differentiation pathways. It is not a peptide, but it is often grouped within peptide and research-compound catalogs because of its use in androgen-receptor, muscle-support, myostatin/follistatin, and body-composition research.
Research on YK-11 has most commonly focused on androgen receptor activity, follistatin expression, myostatin-related pathways, muscle-cell differentiation, anabolic signaling, lean-mass research, and hormone-response markers. Published cell research describes YK-11 as a novel androgen receptor partial agonist that induced myogenic differentiation in C2C12 myoblasts and increased follistatin expression, a protein connected to myostatin regulation.
YK-11 is commonly studied for:
Androgen receptor activity — how the compound interacts with androgen receptor pathways
Follistatin expression — how cells regulate proteins connected to muscle-development signaling
Myostatin-related pathways — how research models study signals that limit muscle growth
Muscle-cell differentiation — how immature muscle cells develop into more mature muscle cells
Lean-mass research — markers related to lean tissue and body-composition changes
Anabolic signaling — pathways connected to tissue growth, repair, and protein balance
Hormone-response markers — how androgen-related pathways influence biological signaling
YK-11 is commonly studied because it combines androgen receptor activity with interest in follistatin and myostatin-related signaling. Direct published research on YK-11 remains limited compared with more established SARMs, but available studies have evaluated its effects on myogenic differentiation, androgen receptor signaling, metabolism, and safety-related markers. Analytical research has also characterized YK-11 and its metabolites for identification and monitoring purposes.
For research use only. Not for human consumption, medical use, diagnostic use, or therapeutic application.