The bodybuilding community’s interest in YK11 stems from the fact that it promises to offer quick muscle gains without any of the side effects that everyone hates.

In a cellular study that was conducted to determine the action and effects of YK11, it was found that this drug can increase muscle mass by escalating the growth of follistatin (a myostatin inhibitor); a well-known muscle-building protein.

Another study suggests that it has the potential to stimulate bone-building proteins to help improve bone health. Bodybuilders who’ve used YK can attest to its incredible ability to stimulate fat loss while increasing muscle gains with no observable side effects. But with no animal or human studies to back these claims, there’s no telling how accurate they are.

Like other SARMs, YK-11 is a banned substance according to the World Anti-Doping Agency, which means it’s off-limits for competing bodybuilders and athletes alike.

IS YK11 A SARM?

YK11 has a similar chemical structure to DHT and this is shown by the way it binds to androgen receptors. The body produces DHT naturally for the purpose of promoting prostate health, hair growth, and appropriate puberty development.

If we were to class YK11 as a SARM then it would be the strongest and most potent of its kind on the market. That’s because it only activates androgen receptors partially, which causes catabolic androgenic activity to shoot through the roof. In addition, YK11 is known as a myostatin inhibitor.

Researchers did a cell study to find out how it works to build muscle. The results show that it simply aims to increase follistatin levels. Follistatin is another naturally occurring protein in the human body which helps keep myostatin in check. Myostatin is a hormone whose job is to curtail unbridled muscle growth.

So far, only YK11 has the ability to inhibit myostatin.

Further evidence suggests that YK11 can also promote bone growth by interfering with a gateway that functions like DHT.