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YK-11: No limits to your muscle growth

YK-11: No limits to your muscle growth

YK-11: No limits to your muscle growth

YK-11 has a unique position in the world of performance enhancers, straddling the line between selective androgen receptor modulators (SARMs) and AAS.


Specifically, YK-11 is an oral 19-nortestosterone-derived AAS with SARM-like effects that also functions as a myostatin inhibitor. Due to these unique properties, it differs from other compounds commonly used by bodybuilders and athletes.

What are the features?

As opposed to traditional SARMs or anabolic steroids (AAS), YK-11 is best known for its ability to suppress myostatin, a protective protein that naturally limits muscle growth. Myostatin serves as a genetically determined ceiling for muscle expansion, and by repressing its activity, YK-11 enables individuals to exceed these natural limits. The ingredient accomplishes this by promoting the activity of another protein, follistatin, which antagonises myostatin.


Because of this unique mechanism, YK-11 has positioned itself as a possible game-changer for those looking to overcome genetic muscle-building plateaus.

YK-11 practical benefits

Pushing the boundaries of muscle growth

One of the outstanding advantages of YK-11 is its unprecedented capability to promote muscle growth by inhibiting myostatin. Consumers report significant gains in lean muscle mass, whether used in combination with traditional AAS and SARMs, or alone.

Firmness and definition of muscles

In addition, YK-11 is renowned for its ability to increase muscle hardness and vascularity. This property makes it particularly valuable in the editing phase, where a "dry" and modelled result is paramount.

Increase strength and power

Sportspeople often notice significant improvements in strength and overall gym performance while taking YK-11, as long as they are using compounds and/or supplements that can promote joint health (as YK-11 weakens connective tissue, more on this later).

Muscle preservation and fat loss

Although YK-11 is not a direct fat burner, it can promote fat loss by inhibiting myostatin. Myostatin is associated with fat accumulation.

Possible side effects

Like any performance enhancing drug, YK-11 is not without risk. Some of the most commonly reported side effects include:

Suppression of testosterone

YK-11 represses naturally-occurring testosterone production, necessitating the addition of post-cycle therapy (PCT) to restore hormonal balance ( if you are not blasting & cruising).

Toxicity to the liver

Although its liver toxicity is considered mild compared with some oral AAS, long-term use or high doses can cause liver damage.

Lipid disorders

Changes in cholesterol levels, specifically a decrease in HDL (good cholesterol) and an increase in LDL (bad cholesterol), are possible.

Discomfort in the joints

Some consumers report joint pain, possibly related to reduced myostatin, which can affect joint health and recovery.

Long-standing unknowns

As a relatively new compound, the effects of YK-11 over the long term are not yet well understood, so caution is advised.

Correct use of the YK-11

YK-11 is typically taken in doses of 5-15 mg per day, split into two doses to maintain stable blood levels, for optimal results. Most practitioners follow a 6-8 week cycle, as longer durations may result in an increased risk of side effects.


To optimize its efficacy, YK-11 is often combined with other anabolic substances, especially testosterone, to combat repression and improve overall results. Correct cycle support and a well-structured PCT are essential to minimise risks and ensure recovery.


YK-11 is a hybrid powerhouse in the performance enhancement arena, offering the combined benefits of SARMs and anabolic steroids. It stands out for its unique ability to inhibit myostatin, offering unprecedented potential for muscle growth and definition. Its novelty and associated risks, however, require careful consideration and responsible use. However, for those willing to meet its challenges, YK-11 can be a truly transformative tool in achieving peak performance and physique goals.

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