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YK-11 is more than just a SARM

YK-11 is more then just a SARM

YK-11 is technically a SARM, but it is different from MK-2866, RAD-140, LGD-4033, and the other SARMS in a couple of ways. The modern SARMs are all non-steroidal in structure. All but YK-11 which is a steroidal selective androgen receptor modulator. It is argued by some that YK11 doesn’t quality as a SARM and that it’s just a synthetic anabolic steroid.

Yk 11 molecular structure
Molecular structure of YK-11

YK11 closely resembles the structure of DHT (Dihydrotestosterone) and just like DHT it is a partial agonist of the androgen receptor.

Another unique property of this steroidal SARM is the fact that it acts as a myostatin inhibitor.

How does YK-11 work?

It is at this point probably important to point out that there is almost no research data available on this unusual SARM. The reason is simply that there has been only very basic research. This has not stopped it from rising in popularity in bodybuilding circles and the like.


The structure of YK-11 is very closely related to that of DHT, a naturally occurring steroid. The similarity was clearly seen in the way that it binds to the androgen receptor.


Some of the basic research I mentioned consisted of cellular testing in order to find out about the basic method of action. The results show that YK 11 simply aims to increase follistatin levels. Follistatin is another naturally occurring protein in the human body which helps keep myostatin in check.

When follistatin is raised, myostatin level is lowered. YK11 binds itself to the androgen receptors inducing muscles that create more follistatin which reduces the levels of myostatin, a protein that limits the growth of skeletal muscle. The result is a whole lot of increased muscle mass.

YK-11 and bodybuildERS

YK 11 has gained popularity among bodybuilders, despite the lack of research. The potency of YK11 on increasing muscle mass and the fact that results can be seen very fast have put it on the map. Most of the effects described below are coming from user reports.


RAPID increase in muscle mass

YK-11 increases muscle mass in a rapid way, which is what one would expect given the way this product works. Reports of a 5 to 10 kg increase in muscle mass during an 8 week cycle are not uncommon. The added muscle mass is said to be maintainable after the cycle.


Another benefit of YK-11 is that it helps to build stronger bones. This is a important, because stronger bones means less chance of injuries when working out with heavy weights.

Side effects of YK-11

The possible side effects of YK-11 are pretty much unknown. This is not because there aren’t any, but because more research into this remarkable compound is required.


HQ SARMS offers YK-11 in the form of a liquid solution as well as in raw powder form.

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