Loading…
for educational and safety purposes
YK-11 and RAD-140 both come up in the same conversations; they overlap on Muscle Growth. YK-11: YK-11 is a synthetic steroidal SARM (selective androgen receptor modulator) famous in bodybuilding circles as a myostatin inhibitor, prized for its potential to push muscle growth past the body's natural limits. RAD-140: RAD-140, also known as testolone, is an experimental selective androgen receptor modulator, or SARM, a class of nonsteroidal compounds designed to stimulate muscle and bone growth while causing fewer of the unwanted effects of anabolic steroids.
YK-11 is a synthetic steroidal SARM (selective androgen receptor modulator) famous in bodybuilding circles as a myostatin inhibitor, prized for its potential to push muscle growth past the body's natural limits. Uniquely among SARMs, it drives muscle cells to produce follistatin, a protein that blocks myostatin, the built-in brake on muscle size. This dual action as both an androgen receptor activator and a follistatin booster has made YK-11 one of the most talked-about compounds for lean mass, though it remains an experimental, unapproved research chemical.
RAD-140, also known as testolone, is an experimental selective androgen receptor modulator, or SARM, a class of nonsteroidal compounds designed to stimulate muscle and bone growth while causing fewer of the unwanted effects of anabolic steroids. It was created by a pharmaceutical company as a potential treatment for conditions such as muscle wasting and, later, hormone-sensitive breast cancer, but it has not been approved for any medical use. Despite this, it is sold online and misused for bodybuilding, a practice associated with reports of liver and heart injury, and it is banned in sport by anti-doping authorities.
both fingerprints on one instrument; where the marks line up the two compounds work the same lever, where a slot goes dark only one of them touches it. read straight from each entry's affinity table; nothing here is invented.
partial agonist
selective agonist (SARM)
inhibits (via follistatin)
raises
stresses (risk)
weak agonist
strengths are the entries' qualitative ratings (strong / moderate / weak); Ki and EC50 figures appear where an entry records them.
easiest to source: YK-11 is currently listed by more trusted vendors (2), so it's the simpler one to get hold of. for effects and safety, read each full entry; this is educational, not medical advice.