CAS number 1370003-76-1 is a unique numerical identifier assigned to YK11, a synthetic steroidal selective androgen receptor modulator (SARM). The CAS (Chemical Abstracts Service) number system is used globally to provide a unique, unmistakable identifier for chemical substances. Each CAS number corresponds to only one substance, facilitating precise identification and information retrieval across scientific literature and databases.
YK11 is notable for its dual role as both a SARM and a myostatin inhibitor. Discovered by Japanese scientist Yuichiro Kanno in 2011, YK11 has gained attention for its potential muscle-building properties. Unlike traditional SARMs that primarily work by selectively binding to androgen receptors to enhance muscle growth and bone density, YK11 also increases the levels of follistatin, a protein that inhibits myostatin. Myostatin is a regulatory protein that limits muscle growth, and by inhibiting its action, YK11 can promote significant muscle hypertrophy.
Despite its promising effects on muscle growth, YK11 is still in the early stages of research. Preclinical studies suggest it can substantially increase muscle mass and strength, but comprehensive clinical trials are lacking. Consequently, the long-term efficacy and safety profile of YK11 are not fully understood. Anecdotal evidence from bodybuilders and athletes suggests benefits in terms of muscle gains, but these accounts are not scientifically verified and should be approached with caution.
There are potential risks associated with YK11. As a steroidal compound, it may pose similar risks to anabolic steroids, including liver toxicity, hormonal imbalances, and adverse cardiovascular effects. Moreover, because YK11 is relatively new and not widely studied, its long-term impacts on health remain uncertain.
YK11 is not approved by the FDA for any medical use, and its legal status varies by country. Often sold as a research chemical, it lacks regulatory oversight, and potential users should be cautious. The limited research and potential health risks associated with YK11 highlight the need for further study to fully understand its benefits and dangers.
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