YK-11 has the same steroid skeleton as other chemical substances belonging to the group of steroid hormones. YK-11 is a partial androgen receptor agonist which can act as a selective androgen receptor modulator.

There is no research on YK-11 that would be carried on animals and so the knowledge comes from the in-vitro examinations of C2C12 cells received from mice. YK-11 taken in an appropriate concentration has a potential on changing the muscle cells.

YK-11 belongs to the group of anabolic steroids and hence it probably possesses typical side effects that other products of that type do. It has 4 CH3 methyl groups which, probably, have negative impact on the liver.  SARM products are safer for the liver as the methyd groups are replaced by halon groups.

YK-11 is a close relative of the DHT anabolic steroid which is a partial androgen receptors agonist and can activate them. YK-11 can compete as regards connecting to androgen receptors. This happens owing to the fact that partial agonists have a dual function and also have a negative influence.

YK-11 positively influences muscle build-up in healthy men. It also effectively reduces mass and muscle strength when it starts influencing receptors of feminine hormones.