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Magnus Pharmaceuticals' YK-11 is not quite a SARM, as it is closer to AAS in chemical structure. However, it is often referred to as SARMs and even studied as such, and at the same time it is known to be a popular myostatin blocker.
Currently, YK-11 is being researched in Japan by a state-sponsored team of scientists. A study on YK-11 dates back to 2011 and concludes that considering it is a SARM because it partially binds to androgen receptors.
In the second study from 2013, the effect on C2C12 muscle cells in the petri dish was investigated. Administration of YK-11 has been found to produce more anabolic factors than a comparable amount of dihydrotestosterone (DHT).
The revolutionary feature of this study is that YK-11 stimulates muscle cells to produce more follistatin, a myostatin inhibitor. Since myostatin is the limiting factor of muscle growth, blocking means simplified and theoretically expressed infinite muscle growth.
YK-11 is to be considered stronger than classic AAS, great for huge muscle growth, increase muscle mass and strength in the shortest possible time, enhancing the anabolic effect thanks to the inhibition of myostatin, which makes it the SARMs among the most powerful ever.

The most reported side effect appears to be aggression. There may be a variable suppression of natural hormone production. This is why a PCT is recommended after its use.

Serving size: 1 capsule
Servings: 50 servings
Content per serving: YK-11: 4 mg

Take 1 to 2 capsules a day, in 2 separate moments away from meals.
At the end of the cycle, a PCT with the appropriate products available is always recommended.
Also useful products such as NAC, LiveR or Liv.52. In addition to Arjuna, Karela, Coletix.

Specific References

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