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YK11 5


YK11 offers. Increased muscle growth, strengthened bones, enhanced strength. YK11 has been classified as a prohibited substance by various sports organizations, including the Olympics, due to its unfair advantages in terms of increased muscle mass and strength.

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YK11 5

Known names: YK11.


YK11 represents a steroidal SARM (Selective Androgen Receptor Modulator) that acts as a Myostatin inhibitor. It stands out as one of the most potent SARMs in the current market and displays comparable effectiveness to certain steroids.

As a SARM, YK11 selectively binds to androgen receptors, differentiating it from steroids. This selective binding allows for the benefits of muscle binding while minimizing the side effects associated with steroids, such as prostate issues. What sets YK11 apart is its role as a Myostatin inhibitor, which explains its recent surge in popularity and attention.

YK11 also functions as a myostatin inhibitor, effectively preventing muscle loss during cutting phases and potentially promoting muscle gains. This characteristic makes it an excellent compound for cutting, lean bulking, and body recomposition.

Understanding YK11’s Mechanism

YK11 operates by inhibiting Myostatin, a protein responsible for reducing muscle mass and strength, while promoting muscle growth. Follistatin, the antagonist of Myostatin, fosters muscle mass and strength. By inhibiting Myostatin, YK11 helps maintain muscle mass and prevent muscle loss. This inhibition leads to increased levels of Follistatin, which effectively supports substantial muscle gains.

YK11 in Relation to Sports

YK11 has been classified as a prohibited substance by various sports organizations, including the Olympics, due to its unfair advantages in terms of increased muscle mass and strength. It is officially listed as a banned substance by organizations like WADA (World Anti-Doping Agency) and USADA (United States Anti-Doping Agency).

However, if you are a competing professional athlete, it is strongly advised not to use this compound.

For more in-depth information on the legal status of YK11 and other SARMs, we recommend reading our comprehensive article addressing the legality of SARMs.

Benefits of YK11

Undoubtedly, you are most interested in the benefits that YK11 offers. Let’s delve into them:

  1. Increased muscle growth
  2. Strengthened bones
  3. Enhanced strength

Side Effects of YK11

Users who adhere to recommended dosages of YK11 generally report remarkable muscle and strength gains with minimal side effects. However, some individuals have reported the following side effects:

  1. Hair loss: Most users who experienced hair loss during the cycle noticed their hair regrowing within a few weeks. This suggests that stress and nervousness during the cycle might have been the underlying cause.
  2. Mild acne: Acne tends to dissipate after the cycle, indicating that stress could have been the primary trigger.
  3. Increased aggression
  4. Temporary decrease in libido: Testosterone suppression caused by YK11 is responsible for this effect. Libido typically returns to normal within a few weeks after the cycle.
  5. Gynecomastia (Gyno): This side effect is exceptionally rare and only occurs in individuals who consume dosages close to 40mg per day for extended periods (over 12 weeks).

It’s worth noting that YK11, when taken up to a dosage of 30mg, does not cause liver damage. However, exceeding this dosage may lead to toxic effects on the liver or other organs.

Dosage and Cycle Length

Most bodybuilders achieve excellent results by taking a daily dosage of 10 to 15 mg for a cycle lasting 8 weeks, reporting minimal side effects. For those new to SARMs, we recommend a dosage of 5 mg YK11 per day for a cycle length of 6 to 8 weeks. Following this dosage protocol should result in significant improvements, especially if you have not reached your genetic limit.


Based on current research, YK11 exhibits a half-life of 12 hours. To maintain optimal YK11 levels in the body, it is advisable to split the daily dosage into two administrations: one in the morning and the other in the evening. For example, if your daily dosage is 5mg, take 2.5mg in the morning and 2.5mg in the evening. This approach maximizes the results of your cycle.

Hair Loss

In short, real and pure SARMs do not cause hair loss. Hair loss is more commonly associated with prohormones found in counterfeit products. For more information on this topic, refer to our article on SARMs and hair loss. To avoid side effects like hair loss, it is recommended to purchase SARMs from reputable vendors, such as the companies we recommend.

Stacking with Other SARMs

It is not advisable to stack YK11 with other SARMs. Given its potency as one of the strongest SARMs available, combining it with weaker SARMs would be wasteful. Additionally, YK11 already exhibits suppressive properties, and stacking it with other suppressive compounds would exacerbate suppression levels. For safety and optimal results, it is recommended to cycle YK11 as a standalone compound.

Stacking with Other Compounds

Several compounds complement YK11 well when stacked together, including MK 677, Cardarine, and SR9009. These three compounds are non-hormonal (non-suppressive), making them ideal for stacking with SARMs. For fat loss, consider adding Cardarine or SR9009 to your stack, while MK 677 can aid in bulking.

YK11 MK 677 Stack

The YK11 MK 677 stack is highly popular and for good reason. YK11 offers significant muscle and strength gains, as well as fat loss benefits. MK 677 complements these effects by providing additional fat loss and muscle gain benefits. Furthermore, if taken in the morning, MK 677 increases hunger, which is advantageous for bulking. If you wish to avoid increased hunger, simply take it in the evening. Importantly, this stack is appealing due to MK 677’s non-hormonal nature, meaning it won’t cause additional suppression.

YK11 Post Cycle Therapy (PCT)

Determining whether you need a PCT (Post Cycle Therapy) after using YK11 depends on the level of suppression you experience. To be absolutely certain, it is recommended to undergo blood tests to assess your suppression levels. Generally, SARMs, including YK11, are not highly suppressive, negating the need for PCT. With high-quality and pure compounds used within normal dosages and cycle lengths, your body should naturally recover within a few weeks after the cycle.

However, some companies may sell products that are more suppressive than they should be, leading to unexpected suppression. If you experience symptoms such as fatigue, low energy, and excessive sleepiness, it suggests the possibility of suppression. If you do not encounter these symptoms, it is highly likely that you are not suppressed.

By adhering to real, high-quality, pure YK11, following normal dosages and cycle lengths, your body will naturally recover without requiring additional interventions.

In Conclusion

In summary, YK11 stands out as one of the most potent SARMs available in the current market. Its strength and muscle gains rival those achieved through certain anabolic steroids, surpassing other strong SARMs like LGD 4033 or RAD140.

However, it’s important to note that limited studies and clinical trials have been conducted on YK11. Nevertheless, many users have reported positive results from cycling it. To achieve favorable outcomes and avoid side effects, it is crucial to source high-quality products and adhere to recommended dosages and cycle lengths.


1 Box of 2x 25Tablets, 5mg per Tablet.


Keep the product stored below 30°C.
Protect it from light exposure and avoid freezing.

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