YK 11 


A recent study has provided compelling evidence of the effects of YK11, a selective androgen receptor myostatin inhibitor, in mice. The study demonstrated that YK11 accelerates the expression of Follistatin, a natural myostatin and activin-binding protein found in the human body. Follistatin has been utilized in the treatment of various degenerative muscle diseases, owing to its ability to raise muscle mass by inhibiting myostatin.

By raising the levels of follistatin, myostatin is effectively suppressed, leading to notable enhancements in muscle mass and strength. The study found that mice with low myostatin levels exhibited twice the muscle mass of mice with high myostatin levels. These findings underscore the immense research potential of YK-11 due to its powerful anabolic effects.

Even though YK 11 holds potential health benefits, it is not safe for human consumption and must be purchased for laboratory research use only.

YK 11 Product Details

YK11 is a selective androgen receptor modulator (SARM) that has gained attention for its potential impact on muscle growth and is a possible replacement for anabolic steroids. It acts by selectively targeting androgen receptors in muscle cells, particularly in skeletal muscle and bone tissue. One notable aspect of YK11 is its myostatin-inhibiting properties. Myostatin is a protein that occurs naturally and regulates muscle development.

YK11 provides an environment favorable to enhanced muscle growth and strength by suppressing myostatin. Its interaction with androgen receptors further contributes to its anabolic effects on muscle cells. Therefore, YK11 holds promise as a myostatin inhibitor and selective androgen receptor modulator, offering potential benefits for muscle growth and development.

Key Features of YK 11 

  • 98% Purity
  • 500mg | 1000mg
  • For research purposes only

Potential Benefits of YK 11

YK11, a steroidal SARM, has garnered attention for its unique properties in laboratory research. While human and animal studies are lacking, preliminary findings suggest promising outcomes. However, caution is warranted as randomized long-term trials are necessary to establish its safety and efficacy for human consumption.

YK11 and Fat Loss

Exploring the expression and regulation of myostatin in skeletal muscle, recent research discovered that YK11 treatment led to a reduction in fat mass. However, without extensive long-term studies, the precise impact of YK11 on fat mass in specific populations remains uncertain. Comprehensive clinical trials are necessary to evaluate the potential efficacy of YK11 in reducing body fat. [R]

YK11 and Muscle Mass

Myostatin, a protein that hampers muscle growth, has been a focus of study. In a cell study, YK11 demonstrated the ability to bind to androgen receptors, inhibiting myostatin production in muscle cells that leads to a reverted muscle mass loss. By promoting the synthesis of follistatin, YK11 showcased the potential for substantial anabolic activity and rapid muscle growth. [R]

This sets YK11 apart from other SARMs, which primarily target androgen receptors in muscle and bone tissue, without influencing myostatin or follistatin. Therefore, YK11 represents a novel steroidal SARM with promising prospects for muscle mass enhancement. [R]

YK11 and Muscle Wasting

Muscle wasting, commonly observed in sepsis patients, has been a target for investigating YK11’s effects. In studies conducted on septic mice, YK11 administration counteracted weight loss in a concentration-dependent manner. Moreover, YK11 demonstrated the potential to reverse muscle mass loss, and muscle cell atrophy, and increase total body weight. [R]

Notably, YK11 aided in the recovery of muscle mass in the back and thigh regions of the mice. Nonetheless, longer randomized trials are essential to assess the efficacy of YK11 in combating muscle wasting, particularly in specific populations. [R]

YK11 and Bones

Laboratory research has explored YK11’s impact on bones, particularly through its activation of protein kinase B (PKB) in osteoblast cells. PKBs, enzymes naturally found in the human body, have shown the ability to stimulate bone growth. Additionally, PKBs play vital roles in glucose metabolism and angiogenesis. However, further comprehensive research and randomized trials are necessary to evaluate YK11’s efficacy in bone strengthening, particularly in specific populations. [R]

How It Works

YK11 operates primarily by targeting the inhibition of myostatin, a protein that is naturally synthesized by muscle cells within the human body. Myostatin serves a vital role in regulating muscle movement and prevents excessive muscle growth and strength, thereby ensuring optimal mobility.

Research conducted at the cellular level has revealed that YK11 achieves myostatin inhibition by elevating the levels of follistatin, an additional naturally occurring protein in the human body. Follistatin has been scientifically proven to effectively control myostatin levels, promoting muscle growth and enhancing muscular strength. This mechanism of action highlights the potential of YK11 as a valuable agent in supporting muscle development and performance.


Due to the limited research available on YK11 and the lack of human studies, it is crucial to exercise caution and consult with a medical professional before considering the use of YK11 or any similar research chemicals. However, based on general principles and the potential effects of YK11, the following individuals should avoid using it:

Minors: Individuals who are under the age of 18 should not conduct research on YK11 or any similar substances without medical supervision.

Pregnant or breastfeeding women: The research effects of YK11 on pregnancy and breastfeeding are unknown, and it is important to prioritize the health and safety of both the mother and the child when conducting research.

Subjects with pre-existing medical conditions: Subjects with underlying medical conditions, such as liver or kidney problems, cardiovascular diseases, hormonal imbalances, or other serious health conditions, should avoid participating in YK11 studies without consulting a healthcare professional. YK11’s potential impact on these conditions is not yet fully understood.

Those taking medications: YK11 may interact with certain medications, including hormonal therapies and other substances that affect muscle growth or metabolism. It is essential to consult a healthcare provider before combining YK11 with any other medications in research studies.

Subjects with a history of substance abuse: If an subject has a history of substance abuse or dependency, it is advisable to avoid using YK11 or any similar substances to prevent the risk of further dependence or complications.

It is crucial to prioritize personal health and safety and to consult with a healthcare professional who can provide guidance based on individual circumstances and potential risks associated with YK11 research.

Potential Side Effects

The safety and side effects of using YK11, a research chemical, have not been extensively studied in humans. Since YK11 has not undergone comprehensive clinical trials, its potential side effects and long-term safety remain largely unknown. However, based on anecdotal reports, some individuals have reported side effects such as increased aggression, hair loss, and changes in hormone levels.

It is crucial to exercise caution, consult with a healthcare professional, and prioritize personal health and safety when considering using YK11 or any similar research chemicals.


In conclusion, YK11 has shown significant potential in laboratory research as a selective androgen receptor modulator (SARM) and myostatin inhibitor. Its ability to stimulate bone growth, reduce body fat, and promote lean muscle mass makes it an intriguing compound for those interested in muscle gains and bone health. Studies have demonstrated its capacity to revert muscle mass loss, highlighting its potential as an effective tool for combating muscle wasting conditions.

YK11’s unique chemical structure and half-life contribute to its distinct mechanisms of action, including the inhibition of myostatin, a key regulator of muscle growth. While rare cases of side effects have been reported, such as hair loss and potential liver damage, cautious use and consideration of post-cycle therapy can help mitigate potential risks.


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