Myo (YK-11) by PureSport is an innovative drug from the SARMs group that helps unlock the genetic code and open new horizons for muscle growth, fat burning, and improving body composition. The principle of action of YK-11 is based on blocking myostatin, an inhibitor of muscle growth in the human body. On the Myo solo course, the indicators of anabolic processes are off the charts, but there are no side effects inherent in AAS.
YK-11 stimulates the synthesis of a muscle growth inhibitor blocker. That is, it increases the level of a regulator in the muscles, which suppresses the activity of another regulator that blocks muscle growth. The result of a double negative is obvious - a rapid increase in muscle mass!

How does Myostatin work?
Myostatin's only function is to slow down the growth of muscle mass so that an animal or person does not turn into a pile of unnecessary muscle that cannot be fed and that ligaments and joints cannot hold. Animal experiments have shown that the exclusion of myostatin receptors leads to an increase in lean mass by 200-300%. People are known to have a mutation in the gene encoding myostatin. All of them were distinguished by abnormal (strong) development of muscle mass.
Effects of taking Myostatin
- rapid gain of muscle mass;
- no water retention;
- stable results without rollback after the course;
- increased strength, endurance, and peak strength;
- no increase in estrogen levels, no risk of gynecomastia;
- does not suppress the synthesis of endogenous testosterone;
- there are no side effects characteristic of testosterone, dihydrotestosterone, and their synthetic derivatives.
Application and dosage of Myostatin
To reduce the amount of fat tissue, take 10 mg - 20 mg per day for 8-12 weeks.
If you want to dry out and gain “lean” muscle mass, simultaneously take 20 - 30 mg per day for 8-12 weeks.
Side effects
First of all, it is important to note that any side effects are dose-dependent. With few reliable data sources, YK-11 testers often had to choose a dose based on trial and error, which could increase the number of negative reviews.
Side effects based on reviews from athletes:
- mild testosterone suppression;
- fatigue;
- low energy level;
- aggression;
- joint pain;
- excessive hair loss;
- mild acne.
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