YK11 Review

YK11 Review: Best SARM for Extreme Size & Strength Gains

Is YK11 the most powerful SARM in the market today?

Everyone seems to believe so and for good reasons. The chemical delivers insane muscle building results within extremely short periods that most of the other selective androgen receptor modulators cannot match. In fact, some reports are actually claiming that YK11 might be a synthetic steroid and not a SARM.

Are these reports true?

Well, on the one hand, we can see YK11 delivering unbelievable results that can only be compared to steroids. On the other, the chemical is not as dangerous as anabolic androgenic steroids. This explains why even though the chemical structure and working mechanism of the substance are not 100% similar to SARMs it is still categorized as one.

The truth of the matter is that YK11 is a Myostatin inhibitor. This chemical reduces the activity of Myostatin thus encouraging your body to build more muscle mass than it would under normal conditions.

YK11 Review: History of YK11

YK11 was first studied by a Japanese researcher called Yuichiro Kanno in 2011. It is, therefore, a relatively new compound that is still under a lot of studies. Many unknowns are surrounding YK11 since it is still in its early phases of trials. For example, we do not know the long term effects, both positive and negative, of the chemical. The one thing that is guaranteed about this chemical is its ability to boost muscle growth.

Further studies showed that YK11 is a partial agonist of androgen receptors. The chemical has gene-selective properties, and that is why it functions like SARMs to deliver the desired results with minimal adverse reactions.

All the results of the limited trials concluded so far reported excellent outcomes in terms of muscle growth. Some trials have even reported YK11 helped bulls gain more than twice the normal lean muscle mass! Studies have also shown that YK11 has more muscle building properties than DHT! Yes, initial trials are showing that muscle cells are likely to become more anabolic when exposed to YK11 than when they are exposed to dihydrotestosterone (DHT).

What is YK11?

YK11 is the most powerful SARM in the market right now. This supplement is so strong that some people even claim that it is more of a synthetic steroid than a SARM. Clinical trials, however, do insists that it is a SARM and as such, we are able to enjoy its potency with minimal to no adverse reactions.

How much do you know about this supplement though? In this review, we will be telling you everything you need to know about YK11. We will help you understand why we believe that it should be at the center of your bodybuilding masterplan.

This selective androgen receptor modulator is quite new in the market. The compound was first properly identified by a Japanese scientist, Yuichiro Kanno, back in 2011. Since then, the drug has been at the center stage of different pharmaceutical companies all of which are trying to identify the full length of its benefits. So far, trials have shown that YK 11 functions as a myostatin inhibitor. When introduced in the body, this compounds helps in slowing down the operations of myostatin which then gives your body an opportunity to grow more muscles at a faster rate than you would be able to do naturally.

The little information that is already available about this compounds shows incredible results and no wonder it is among the most sought-after SARMs at the moment.

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How does YK 11 work?

YK11’s performance revolves around its myostatin-inhibition properties. Myostatin is a protein that is commonly found in skeletal muscles. We all have this protein but its levels usually vary from one individual to another. The role of myostatin is to regulate the growth of muscles. Ideally, this is the compound that makes sure your muscles are never too big to interfere with other functions in the body. The problem, however, is that its presence can block the progress of athletes who are trying to increase their muscle mass.

Research has even shown that individuals with naturally low levels of myostatin are always more muscular and stronger than the ones with more of this protein. By blocking the functions of this protein, YK 11 helps to unlock your full potential allowing you to grow your muscles as big as you and your body can handle.

YK11 helps in preventing the production of myostatin by attaching on the androgen receptors. Additionally, this supplement increases the production of Follistatin which is also useful in slowing the secretion of myostatin.

From how YK11 works, it is easy to see why it is categorized as a SARM. The big argument that associates it with other steroids is based on its backbone structure which seems to be similar to that of steroids. However, based on how it works and the fact that it doesn’t exhibit as many adverse reactions as we see in steroids makes us believe that it is a SARM.

As we pointed out earlier on, Yk11 is a relatively new compound in the industry that is still undergoing various clinical trials. Perhaps with more data in future, we may be able to understand more about its performance to conclusively end the debate on whether it is a SARM or not.

YK-11 vs Testosterone

Testosterone is a crucial hormone that functions as both a sex hormone and an anabolic steroid. It is due to the latter that Testosterone supplements are commonly used by bodybuilders. Both YK-11 and testosterone supplements have the same end game but how each one of them works to get there is what sets them apart.

Testosterone supplements are mostly administered directly in the bloodstream through injections. This causes an influx of the hormone within your body. As a result, you will experience more of its “anabolic steroid” properties leading to increased muscle mass, vitality, and overall strength. These are amazing benefits but they do come at a price.

First, injecting testosterone supplements causes an immediate spike of the hormone in the body. Scientists explain that this may become dangerous to your body as it can interact with other cells interfering with their functions. Secondly, the sudden introduction of testosterone will prompt your body into thinking that there is enough of the hormone within your system.

Your body, will, therefore, respond by slowing down the natural production of testosterone. This will be a problem in future because the injected testosterone won’t last forever. The fluctuation in levels of testosterone will also interrupt with the muscle building process. Finally, testosterone supplements aren’t particularly ideal for women. Women using these products risk experiencing virilization i.e. expression of male characteristics.

YK11, on the other hand, is a bit more precise in its operations. This SARM is extremely selective and hence users are able to enjoy consistent and faster results with limited side effects. Secondly, the bioavailability of this compound is decent enough for it to be used orally. As we all know, oral supplementation is much safer and desirable compared to injections.

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Benefits of YK11

How does YK11 work to achieve the numerous benefits it is so famous for?

YK11 is a Myostatin inhibitor which merely means that it blocks the actions of Myostatin in the body. What actions are these?

Here is the thing about the human body; we are designed to have some lean muscle mass but not too much of it. If you were to work out with no supplements at all, you would see yourself gain some muscles until you hit a plateau where there’ll never be any more muscle gain regardless of how hard you hit the gym.

That’s your body’s mechanism of stopping you from having too much muscle mass that it cannot handle. Myostatin is the culprit behind this. The protein restricts your body from creating excessive skeletal muscles. While this is a good thing as it prevents muscle hypertrophy, it can be very frustrating for everyone who’s trying to put on some muscles.

Studies show that humans who have low levels of Myostatin usually have more lean muscle mass than guys with high levels of Myostatin. This was proved in animal studies. Also, individuals with mutations in their Myostatin genes are typically stronger and with more muscle mass than usual.

So, when you take YK11, it inhibits the activities of Myostatin thus getting rid of the barrier standing between you and bigger muscle tissue.

The following are some of the benefits of YK11 that have a scientific backing:

Increases muscle tissue

YK11 is so effective in increasing muscle tissue that some users reported seeing results within the first week of using the substance! Other users have reported gaining between 8 to 15lbs of muscle mass after a complete cycle. This perfectly explains why some people believe that it is the most potent “SARM” available today. The beauty of it is that it doesn’t just deliver big muscle tissues, but it does so very quickly. Isn’t that every fitness enthusiast’s fantasy?

When YK11 gets into your system, it selectively binds to the androgen receptors in the muscle tissue. The compound increases the levels of Follistatin which will then block the production of Myostatin.

It’s important to note that none of the undesirable side effects associated with equally powerful steroids will be witnessed here. There won’t be any water retention issues, and neither will your balls shrink.

Increases bone density

One of the reasons why your body is engineered to control the amount of muscle tissues you are gaining is due to the support that is required to sustain the muscles. For instance, if you are putting on pounds of muscles every week but your bones and connective tissues are unable to offer adequate support, it’s almost guaranteed that injuries and other health complications will be the order of the day for you.

To counter this issue, YK11 stimulates the production of healthier and stronger bone cells. It does so by activating protein Kinase B (PKB) which sends signals for increased growth of bone cells.

The ability of YK11 to enhance muscle growth also serves to strengthen the bones.

With stronger bones, the risk of fractures is reduced significantly. This should give you the confidence you need to work harder in the gym.

Promotes fat loss

YK11 is not the most potent fat burning SARM you can get, but it will still help you lose reasonable amounts of fat. The substance promotes an anabolic surrounding which encourages the burning of fats to produce energy.

Since YK11 increases muscle mass and boosts strength levels, the user will also break down more calories through their day-to-day workout sessions.

If you are planning on using this substance in a cutting cycle, we’d advise you to stack it with other SARMs for better results.

Clinical studies on the effect of YK 11

Studies on the intake of YK-11 by the Faculty of Pharmaceutical Sciences at Toho University confirm that the SARM supplement YK11 successfully acts on myostatin (the protein that genetically regulates the amount of muscle mass in your body).

The gene encoding myostatin was discovered in 1997 by geneticists Se-Jin Lee and Alexandra McFerron. Many experiments have been performed on mice, cattle, and other animals that have gained double muscle due to the absence or suppression of this gene.

A boy from America was diagnosed with a clinically similar condition. His body produces a normal level of functional myostatin.

But a defect in its myostatin receptors prevents its muscle cells from responding normally to myostatin. This made him much more muscular and strong than 85% of his peers!

The bad thing about it is that it is difficult to store fat. Due to this fact, he must eat more often than others in order to have a sufficient supply of energy!

He appeared on the TV show “The Strongest Child in the World”.

The reviews we receive for YK11 indicate that this SARM supplement definitely works, but is there an application in sports?

How will YK11 help you in sports?

The opinion is that SARM YK-11 will not find such a wide application in sports because the amount of muscle mass you can gain is too large.

Is this a problem?

Yes, most sports require a set of qualities. Big muscles require more oxygen, this will definitely affect your endurance. And when your muscle grows to such a level that it already starts to interfere with your speed and balance, this can be a big problem.

Secondly, this huge volume of muscle mass that can provide you with a cycle with SARM YK11 also requires maintenance. That is food and time during which to consume it 5-6 times a day.

Fortunately, there is a sport that you can emphasize and in which taking the SARM supplement YK11 will be of great benefit.

Bodybuilding combines exactly these factors. There, your task is to model your body and add as much muscle mass as possible to your structure.

We observe how bodybuilders nowadays are getting bigger and bigger and still continue to gain muscle mass?!

How exactly does this happen? Growth hormone, steroids, peptides? That is no longer enough…

However, let us not forget that the human body has a certain limit. YK11 also comes into play here. The unique functionality of this SARM supplement allows you to block myostatin while taking YK11.

In other words, the cycle SARM YK11 removes the barrier and allows your body to produce truly unrealistic amounts of muscle fibers and fiber!

But as we mentioned earlier, all this mass needs calories and stimulation for growth. That is, your task will not be exhausted until the adoption of YK11.

The results will be expressed in increased calorie consumption and heavy training!

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Bodybuilding Uses of YK11


YK11 is a very powerful bulking substance. It is arguably more powerful than all the SARMs in the market at the moment. Some trials also claim it to be more potent that DHT!

The unique approach of this Myostatin inhibitor allows the body to grow more muscle tissues within a short time by preventing the action of Myostatin. The standard 8-week cycle can help you gain more than 8 pounds of muscle mass! Bear in mind that all this is achieved when using YK11 in a solo cycle so you can imagine just how tremendous the results will be if you were to stack it with another SARM.

An example of a powerful bulking cycle can include YK11 and Ligandrol (KGD-4033). Ligandrol is quite a potent bulking SARM in itself and hence using it alongside YK11 will only serve to deliver even better results in a much shorter period. In this stack, the user should take between 5-10 mg per day of YK11 and 5-15 mg per day of LGD-4033. Start low and avoid using high levels of either of the two compounds in this stack.

YK11 can also be stacked with RAD-140 (Testolone). This stack delivers excellent results, but it isn’t as powerful as the one discussed above. Here, you should take 5-10 mg/day of YK11 and 15-30mg/day of RAD-140.

Protecting muscle tissues

It’s very disappointing to see all the lean muscle mass you worked so hard to gain disappear. This happens quite a lot especially when you are doing strenuous workouts that are cutting calories rapidly for extended periods.

YK11 provides your muscle mass with the protection it needs to withstand your rigorous workouts.


On its own, YK11 is not the best cutting drug that you can use. However, it is excellent in protecting muscle tissue, and hence it helps to keep your muscle mass intact throughout your cutting phase. It should, therefore, be used alongside other better cutting compounds like Cardarine.

It is also believed that YK11 may promote weight loss since it boosts muscle gains. This, in turn, breaks down more calories thus enhancing fat loss. The cutting impact here is very minimal though.

Best SARM Stacks with YK11

The ideal combination with YK11 is Ibutamoren MK677 and Testolon RAD140!

Ibutamoren MK677 increases the production of growth hormone. The effect of Ibutamoren is equal to the results you can expect from normal doses of injectable growth hormone.

The difference is that Ibutamoren MK 677 stimulates your own body to triple its production instead of introducing a synthetic hormone into your system. This will improve the recovery process and boost your metabolism.

The strategy with this combination is to build an ideal environment for muscle growth and development.

Testolon RAD 140 is quite similar in effect to testosterone and its name suggests. It complements perfectly with YK11 and Ibutamoren, as it is selective and does not affect secondary organs.

Testolone RAD140 accelerates protein synthesis increases levels of strength and explosiveness of muscle fibers.

This combination creates the perfect anabolic environment for growth and development!

Its effect is guaranteed even for people who have absolutely no genetic potential to build muscle.

YK11 Cycle

YK11 is quite a powerful compound, and hence its cycles are usually slightly shorter as compared to other SARMs’ cycles. Most people take YK11 for 6 to 8 weeks followed by a break. New users who are still experimenting with the chemical should stick with 6-weeks cycles. This helps in minimizing the risk of side effects. Experienced YK11 users can take the substance for slightly longer (8-10 weeks) and at higher doses.

YK11 can also be incorporated in other stacks which may run for slightly longer than 8 weeks. Personally, I would never use YK11 for more than 8 weeks, but if you feel like you must take YK11 for more than that, it’s best that you keep the doses very low. Taking YK11 for more than it’s necessary can easily result in severe testosterone suppression and liver toxicity which can lead to even more severe medical complications.

Every cycle of YK11 should be followed with post cycle therapy. PCT helps to restore all the damage YK11 will have done on your testosterone production. Taking a break from powerful chemicals such as Myostine will also help your body to resume normal functioning and restore normal hormonal levels before you start retaking the compound.

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Post-cycle Therapy with YK11

After this SARM, post-cycle therapy is needed for recovery:

There are 2 post-cycle options you can try:

Option 1 for post-cycle therapy with YK-11

SERM selective estrogen receptor modulators. These products control estrogen receptors and can stimulate the production of your own testosterone.

They also block estrogen, which is produced by the increased production of new testosterone.

Popular SERMs:

  • Clomiphene – 25mg to 50mg daily 3-4 weeks after a cycle
  • Tamoxifen – 20mg to 30mg daily 3-4 weeks after a cycle

Option 2 for post-cycle therapy with YK 11

Vitamins and minerals that increase the production of testosterone and luteinizing hormone (hormone responsible for the production of semen).

Suitable combination:

  • Zinc – 25mg to 30mg per day 4 weeks after a cycle
  • Vitamin D – 2000iu to 5000iu per day 4 weeks after a cycle with CSARM
  • Selenium – 100mcg-200mcg per day 4 weeks after a cycle with SARMs

YK11 Dosage

The amount of YK11 you should take will depend on many factors:

If you are a new YK11 or SARMs user, it is best to start with the lowest doses possible. Ideally, all new users should start with just 5 mg per day for the first few weeks before making a 5mg increment. If you already have some experience with using YK11 and other SARMs, you can start with 10mg per day.

Your fitness goals will also determine the doses you end up taking. The dosage required to deliver excellent bulking results is not always the same when it comes to cutting cycles.

YK11 dosage might also change if you decide to stack it with other performance-enhancing drugs. Make sure that you get the doses right whenever you are running a stack because the combination of several powerful compounds may become really dangerous.

With that in mind, experts recommend a dose of between 5 to 20 mg per day taken for a period of between 4 to 8 weeks. If you are a new user, you can start with 5mg per day for a few weeks, increase the dose by another 5mg, take your time to monitor your response and the results you are seeing before readjusting the dose accordingly. If you are responding well, you can increase the dose by another 5mg or even 10mg. This is how you’ll finally find your sweet spot. You should never take more than 20 mg/day though.

Due to tolerability issues and the risk of unpleasant masculine traits, women are usually advised to take much lower doses than the ones discussed above. The dosage should vary from 0.2 to 5mg/day.

There is minimal information on the half-life of this compound. It’s, therefore, a bit difficult to tell for how long a single dose will remain active in the system. Anecdotal evidence seems to suggest that YK11 has a very short half-life of 6-8 hours. Therefore, to achieve the best possible results, the user should split the dose into two. This helps in maintaining high levels of the compound in your system thus optimizing its performance.

Side Effects of YK11

YK11 is an insanely powerful substance, and hence it is bound to have some undesirable effects on your body. Some of the most common side effects that you can expect from this substance include:

  • hair loss
  • acne breakout
  • headache
  • joint pain
  • difficulty sleeping
  • increased aggression
  • may induce nausea and vomiting

Most of the above side effects will disappear once you finish your cycle. In some individuals, the side effects are merely a sign that your body is readapting to the presence of the new chemical. After a few weeks of using YK11, the body may get acclimated to the substance, and hence some of those side effects will disappear.

In some severe cases, YK11 may also raise your blood pressure slightly. The risk of this happening increase as you increase the dose. Also, individuals who already have a history of hypertension are at a higher risk of escalating the condition if they use YK11 and this is regardless of the dose taken. To stay safe, anyone with high blood pressure issues should remain clear of YK11.

YK11 is not just associated with steroids due to its powerful nature but also because of its structure. This is why some people are calling it a synthetic steroid. Due to the familiarity of YK11’s structure to that of steroids, it is believed that the substance may cause slight liver toxicity. It not yet clear whether this is 100% true due to the lack of sufficient human trials.

High levels of Follistatin have always been linked to a higher risk of contracting skin, stomach, prostate and esophagus cancer. The fact that YK11 inhibits Myostatin actions by increasing the levels of Follistatin in the body is therefore very worrying.

Unfortunately, the lack of comprehensive human trials makes it impossible to tell whether indeed YK11 can directly cause cancer or not. This may be a long-term effect whose manifestation will start after years of using the substance. Let’s just hope that the ongoing clinical trials will clear the air on the matter soon.

There is also a possibility that long-term use of YK11 may result in gynecomastia, i.e. enlargement of male breast tissues. Gyno or “man boobs” as most bodybuilders call it can ruin your entire physique. Again, without enough human trials, it is difficult to know whether taking low doses or running shorter cycles reduces the risk of contracting the condition.

The working mechanism of YK11 is also bound to have some impact on the production of testosterone. This is an issue that has been reported by many users around the world. When testosterone production is suppressed, and you stop taking YK11, your body will become less anabolic.

After a few weeks, you will notice that all the muscle gains you made are disappearing and fat deposits will start becoming visible. Low testosterone levels will also affect your sex life. For instance, erectile functioning will be affected, and your sex drive will drop.

The good news is that you can avoid all this by running post cycle therapy after using YK11. PCT is particularly crucial when you are dealing with substances as powerful as YK11. This therapy will restore the normal production of testosterone. The ordinary YK11 PCT usually uses Clomid (Clomifene) and Nolvadex (Tamoxifen).

YK11 is an extremely powerful substance even for men. Its usage in women can hence yield terrible complications. Some reports suggest that women suing YK11 may experience deepening voice, facial hair growth, irregular menstruation and deepening of the voice.

Is YK11 legal?

YK11 just like the other SARMs is in the grey area when it comes to the question of legality. While no laws are permitting the use of the compound for human consumption, there is also no law that is prohibiting its use. These substances lie in the gray area, and this has made it really difficult for the DEA and relevant authorities to control their distribution and consumption fully.

Most people, therefore, buy the substance under the disguise of “research purposes” but usually end up using it for bodybuilding reasons. If you are a scientist conducting some research, you should be able to get medical grade YK11 very easily.

If you are just interested in buying the compound for fitness purposes, then you can get it in excess from the internet. Unfortunately, the online SARMs market is unregulated, and hence you need to be careful about where you are sourcing the substance from. Remember that contaminated YK11 is not just a waste of your money, but it can also result in life-threatening complications. You can check out our list of some of the recommended online vendors of SARMs to make your shopping experience easier.

The one place where the use of YK11 is definitely not entertained is in professional sports. Stay clear of YK11 if you are a professional athlete lest the World Anti-Doping Agency and other sports governing bodies catch up with you.

Where can I buy YK11?

You can buy YK11 on Brutal Force official website.


Performance enhancing drugs are the only way out of the genetic limit that your body sets when it comes to muscle growth. Once you’ve reached that limit, it won’t matter how many hours you spend in the gym or how heavy the weights are, but you will never go past the plateau. YK11 lifts this limit thereby unlocking unlimited muscle building potential.

YK11 may not be very well studied but from the information we have, we can confidently say that it is one of the best SARMs out there. User reviews also prove that it performs brilliantly and with no complications. YK11 is, therefore, highly recommended for anyone looking to increase muscle mass within a short period.

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