Ostarine (MK 2866) Review, Results, Dosage

This is the definitive overview and guide to Ostarine, also known as Enbosarm or MK 2866. 

In this guide, you’ll discover:

How does Ostarine work and what is it?

Is Ostarine authorized in my country?

What are Ostarine’s advantages and adverse effects?

Where to purchase pure, high-quality Ostarine

Is Ostarine required to have a PCT?

What is the optimal dose of Ostarine?

What can I anticipate from an Ostarine cycle?

Lots, lots more

It is important to remember that ostarine is just a research chemical that is not intended for consumption by humans. You should never rely on this information as medical advice; you should always consult a physician.

Look up this YouTube video instead of reading this detailed guide if you’re in a hurry and don’t have the time to read it. It is not as comprehensive, but it covers the essentials of MK 2866.

What Is Ostarine?

Ostarine, MK 2866, and Enbosarm are SARMs. It targets androgen receptors. Ostarine’s benefits include:

Muscle growth

Fat loss


Healing attributes

We’ll discuss Ostarine’s benefits later.

How Does It Work?

All SARMs operate in a very similar manner, but their relative potency varies significantly.

Ostarine is among the SARMs that are the least potent, safest, and most researched; however, despite the fact that it is one of the least potent, it can still produce impressive results.

It is intended to selectively target androgen receptors in the human body. It selectively targets androgen receptors, which reduces undesirable side effects such as an enlarged prostate or significant hair loss.

Steroids, in contrast, do not exhibit selectivity; as a result, they are associated with a significantly greater number of adverse effects and present a substantially higher risk.

Therefore, SARMs have effects similar to steroids, but are much safer and have fewer side effects. Clearly, steroids are significantly more potent than Ostarine, but some SARMs, such as YK11, can compete with steroids.

And while side effects are still possible with this compound, they’re extremely rare and mild.

History of Ostarine

In 1997, GTx Inc. developed Ostarine as a treatment for muscle wasting diseases and osteoporosis. This medication is also known as MK 2866 or Enbosarm.

2007 marked the beginning of Phase 2 clinical trials for Ostarine.

In 2011, numerous Ostarine human trials were conducted. One of the studies that looked at the effects of Ostarine on elderly men found that it led to a significant increase in the participants’ lean body mass.

In 2016, Ostarine was found to be ineffective in treating muscle wasting diseases in patients with lung cancer during phase 3 clinical trials. Ostarine nearly completed these trials successfully. It failed because lung cancer patients were too frail to use Ostarine.

Currently, Ostarine is in the process of being developed. It is undergoing numerous clinical trials with the goal of one-day treating muscle-wasting diseases.

Is Ostarine Legal?

Ostarine will be completely legal in all countries around the world by the year 2020, with the exception of Australia. Later in this article, we’ll discuss the legality of the Australian MK 2866.

However, if you are not from Australia, you will have no issues purchasing or utilizing MK 2866.

In my essay on the legality of SARMs, I discuss Ostarine in greater detail.


The Therapeutic Goods Administration (TGA) classifies Ostarine and other SARMs as Schedule 4 prescription compounds in Australia.

Therefore, it is illegal to use MK 2866 without a prescription. Even so, a significant number of people in Australia make use of MK 2866 and various other SARMs.

If you are caught, you could face up to four months in prison. I haven’t seen anyone actually incarcerated for using SARMs.

It is a different story when it comes to selling Ostarine in Australia. If you just buy it and use it, they take it much less seriously than if you sell it.

If you are simply purchasing and utilizing MK 2866, there will almost certainly be no issues. If you are caught selling it, however, without the appropriate authorization to do so in Australia, you could face a fine of up to one million Australian dollars.

Read my article about SARMs in Australia for more information on this topic.

Professional Sports

It is essential to note, however, that Ostarine and other SARMs are banned in competitive sports.

Ostarine is a prohibited substance by nearly all sports organizations, including the Olympics, as well as USADA, WADA, and ASADA (Australian Sports Anti-Doping Authority)

This is due to the compound’s obvious unfair advantages, such as enhanced strength, muscle mass, and endurance.

Professional athletes should avoid using MK 2866 and other SARMs.

MK 2866 can be detected by SARM-detecting tests. If you are tested and have used it within the past 10 days, you will be caught. However, if you refrain from using it for ten days, you will not have a positive test result for Ostarine because the substance will have been eliminated from your system by that time.


Ostarine is among the most prominent and commonly used SARMs, so it has been subjected to the most testing. Additionally, a substantial amount of research and investigation has been carried out regarding this compound and the advantages it offers.

Some of Ostarine’s Advantages

Gains in muscle mass

Strength improve

Lower body fat

Maintaining muscle and strength while cutting

Increased Muscle Mass

In clinical trials as well as in my own experience, ostarine was found to improve muscle mass while the user was still adhering to a caloric deficit. This indicates that even when we’re in a caloric deficit, we will still be capable of building some lean muscle whilst also decreasing our overall body fat percentage.

On a slight bulk, you can also take Ostarine to gain far more lean muscle mass.

Even at low doses of 3mg per day, Ostarine increased muscle mass significantly, as depicted in the image above, which is based on human clinical trials.

The test group that took MK 2866 at a dosage of 3 milligrams per day for a period of 12 weeks was able to achieve 3 pounds more of lean muscle mass than the control group. This is while maintaining the same level of exercise and nutrition. Remember that a dosage of 3 milligrams per day is considered to be quite low.

If you want to pack on enough muscle mass as humanly possible, I strongly suggest that you look into either RAD140 or LGD 4033. When it comes to doing that, they are significantly more effective than Osteorine is.

MK 2866 is a muscle-building “cheat code,” but it’s relatively mild compared to other SARMs. The good news is that it has been extensively studied and is regarded as a really safe compound.

On average, you can anticipate gaining 2 pounds of muscle while cutting, and 6 pounds of muscle while lean bulking.

Remember that exercise and diet will continue to be crucial.

Increased Strength

Similar to other SARMs, ostarine provides a significant increase in strength.

Even if you are dieting, you will notice a weekly increase in strength. In most cases, it takes about two to three weeks using MK 2866 before the increased strength is noticeable.

Particularly if you are a beginner, you can anticipate a rapid improvement in your lifts.

This compound is also excellent for breaking through a plateau in strength that you have been stuck on for some time.

Fat Loss

Ostarine is very important for enhancing fat loss and muscle growth. This suggests that this compound is an excellent choice if you wish to undergo a body recomposition, in which your weight remains the same but your muscle-to-fat ratio improves dramatically.

In addition to stacking it with Cardarine or Stenabolic for optimal results, I believe that MK 2866 is the most effective and safest method for losing fat while gaining muscle.

Maintaining Muscle On a Diet

Ostarine is renowned for its remarkable ability to preserve strength and muscle mass during a cut. When taken during a caloric deficit, the anabolic steroid MK 2866 can, depending on the user’s training and diet, result in increased muscle mass and strength.

This is not surprising given that this compound was designed to combat muscle-wasting diseases.

Many individuals begin by gaining a substantial amount of muscle mass and strength. Then, they cut with Ostarine, which makes it easier for them to retain all of their strength and muscle.

Adverse Reactions

Similar to most other compounds, Ostarine is imperfect.

Reduction in the amount of testosterone that your body normally produces

Let’s delve further into this “side effect.”


As stated, MK 2866 will inhibit your natural testosterone production.

Bear in mind, on the other hand, that the suppression that this compound causes, presuming that it is authentic and of high quality, will be quite mild and barely noticeable at all. Even if you do notice it, your body will recover naturally within a few weeks.

You could artificially aid your body’s recovery by implementing a post-cycle therapy (PCT) protocol, but that may not be the best idea.

Remember to adhere to standard cycle length and dosages to ensure the suppression is as minimal as possible. Ensure that the MK 2866 you purchase is pure and of high quality. Some businesses sell substandard goods laced with additional substances. As a result, these substances can be quite suppressive. In contrast, genuine Ostarine is only very mildly suppressive.

Additional Unwanted Effects

Some users of this compound report additional adverse effects, including insomnia.

Joint pains

Loss of hair

Numerous human trials and studies on Ostarine have been conducted, but none of them have revealed these side effects.

Consequently, there are two potential explanations for why people experience these side effects.

The first explanation is that the MK 2866 that they used was fake and adulterated with other substances, which is what led to the occurrence of these adverse effects. Unfortunately, the market is flooded with products like these.

If you experience such peculiar side effects with a drug like Ostarine, it is almost certainly bogus, in my opinion.

Individualism is a second possible explanation for these “side effects.” Everyone reacts differently to substances such as MK 2866. A minority may experience adverse effects such as insomnia. If you are experiencing any of these adverse effects, however, it is likely that the SARMs you are taking are not effective.

Ostarine Vs Steroids

Ostarine is significantly weaker than steroids, but has only one percent of their side effects. This indicates that MK 2866 is much safer to use, while still producing excellent outcomes.

My Review

Numerous researches and studies support Ostarine and its advantages. Before you purchase MK 2866, however, I would like to share my experiences and findings with this compound.

I experienced extraordinary benefits while taking this compound. Both my gains in muscle and losses in fat were unexpected.

Here is a brief overview of my SARM cycle. I took these daily for eight weeks.

Ostarine – 10mg each day

Cardarine (not a SARM) – 15mg each day

I gained 5 pounds of muscle and lost 4 pounds of fat over the course of eight weeks. My bench press increased from 270 to 290 pounds, indicating a significant increase in strength. Bear in mind that I’m not a beginner when it comes to lifting weights, and that my results would have been much more impressive if I had done a cycle similar to this when I first started lifting weights.

Although Cardarine was included in my cycle, Ostarine is responsible for the majority of the results I’ve observed. I increased my endurance with the help of Cardarine, which I took.

Because I didn’t have any negative reactions to the cycle as a whole, I can confidently say that I enjoyed it very much and that I would do it again in the future.


One of the most common negative effects of steroid use is a rise in cholesterol levels. And while SARMs have similar benefits to steroids, they lack the side effects of steroids.

Studies indicate that MK 2866 does not increase cholesterol levels like steroids do. Ostarine can even reduce cholesterol levels.

According to the findings of the same research project carried out by the Department of Medicine at Saint Agnes Hospital, not only was MK 2866 effective in treating and preventing muscle wasting, but it was also found to result in a decrease in both HDL and LDL cholesterol levels.

Dosage and Life Cycle

We recommend beginning with a daily dose of 15mg or 20mg. This appears to be the optimal dose for achieving optimal results without adverse effects. You won’t be suppressed at the end of a cycle if you take this dosage, or at the very least, you won’t feel the suppression, and it’ll be gone in a matter of weeks. Obviously, this is only true if you have access to pure, high-quality MK 2866.

This appears to be the case for the majority of SARMs, as we recommend an 8-week cycle. Attempt to maintain a cycle length of eight to ten weeks at most.

How to Consume Ostarine?

Taking MK 2866 is a very easy and straightforward process, particularly if you purchased the liquid form of the drug. Put the desired dose into a glass filled with water, and then consume it.

You can take additional steps to maximize the effectiveness of your dosage. You can achieve this by taking Ostarine sublingually. This indicates that you should wait a few seconds after placing your dosage under your tongue before swallowing it. Due to the tissue beneath the tongue, the entire dose of Ostarine is absorbed into the bloodstream.


The compound is something I take in the morning.

Research confirms that Ostarine has a 24-hour half-life. This indicates that we should only take our dose of MK 2866 once every twenty-four hours. In this manner, we will maintain optimal levels of Ostarine in our bodies, resulting in excellent outcomes.

You can even take it a step further by dividing your daily dosage into 2 sections by taking the first part in the morning and the other part in the evening. This will allow you to maximize its effectiveness. In general, you should administer a half dose every 12 hours. According to research, this is more effective than administering a single dose daily. However, the difference is not significant, so there is no need to worry if you only take MK 2866 once in every 24 hours.

Ostarine PCT

When I took Ostarine, I did not experience any side effects, but some people claim they become suppressed. This could be due to their extreme sensitivity to MK 2866, or they may have received a substandard product containing a different substance.

If you are suppressed following an Ostarine cycle, you should wait a few weeks, as your body will likely recover very quickly. PCT (Post-Cycle Therapy) is utilized by a number of individuals, but PCT can cause side effects. Certainly, you will recover faster, but I believe it’s best to let nature take its course and wait a few weeks.

My Ostarine Results

I recently completed an eight-week Ostarine and GW 50156 cycle. My objective was to reduce the amount of body fat I had while also increasing the amount of muscle I had. In spite of the fact that I combined Ostarine and Cardarine, I could have accomplished the same results even without using the combination.

I was able to reduce my body fat percentage from 16% to 10% after completing the cycle. In addition to that, as a direct result of taking Ostarine, I gained a few additional pounds of muscle on top of that. Also, despite cutting, I did not lose any strength gains; in fact, I gained a few pounds on all my major lifts.

During the cycle, I ate at my maintenance caloric intake. Due to Cardarine, I was able to consume maintenance calories and still lose fat. If I had not taken Cardarine during this cycle, I would have been able to achieve the same results through calorie restriction. If I want to cut body fat and gain a few pounds of muscle at the same time, I love to stack MK 2866 with Cardarine because it makes eating at maintenance easier to do. For this reason, I like to take MK 2866 with Cardarine.

Because I wasn’t suppressed in any way, I didn’t need to go through any post-cycle therapy (PCT for short). Because of its extremely low level of suppression, MK 2866 does not call for a post-cycle therapy (PCT), especially not at dosages as high as these.

How to Maximize the Benefits of Ostarine

Let’s go over some suggestions for optimizing your Ostarine cycle and you’ll get the best possible outcome from it now that we’ve covered pretty much everything there is to know about this compound as well as what you can anticipate from it.

Our four tips:

-Work hard

-Maintain a healthy diet.

-Purchase pure, premium-grade Ostarine

-Continue training beyond the cycle

Despite the fact that the first 2 are self-evident, many do not recognize their significance. While MK 2866 is a cheat code for achieving results inside the gym, it is not a miracle pill which will make you ripped and strong without exercise or at least a healthy diet. In actuality, you must engage in at least moderate exercise and consume a healthy diet in order to achieve optimal results with this compound. Just at end of your cycle, is when you begin to see visible results, you’ll be glad that you worked so hard.

The third piece of advice is to avoid purchasing bunk products. As a result of purchasing subdosed or counterfeit Ostarine, some individuals experience less-than-optimal results. In addition, they may experience unwanted side effects that Ostarine does not cause, but which are the result of other substances added to their substandard product. Ensure that you purchase only pure substances.

The final point, continuing to train after the cycle has ended, is also crucial. You would be able to maintain all of your gains after the cycle if you continue to exercise. However, if you actually stop training after your MK 2866 cycle and begin eating a very poor diet, you will gradually lose any gains you made from using the supplement.

Where to Purchase Ostarine?

We are required to purchase our Ostarine and any other SARMs from reliable vendors who offer authentic and unadulterated chemical compounds. In this manner, we can avoid the side effects associated with counterfeit or adulterated compounds.

After trying Ostarine from a wide variety of manufacturers, I can say without a shadow of a doubt that the results I got from this particular manufacturer were superior, and I experienced zero adverse effects. Their products are third-party tested and superior to the majority of MK 2866 on the market.

And the very best part about them is… They offer a money-back guarantee for 90 days. This means that you will receive a full refund if you are not satisfied with the results. Sweet, right?


Ostarine is an excellent anabolic supplement for both novice and experienced lifters. In addition to promoting the growth of lean muscle and the loss of fat, it also results in significant strength gains. Ostarine is a very safe SARM, and if you purchase it from reputable vendors, like the one I recommend, you won’t experience any adverse effects.


In this section, we’ll go over some of the most common queries people have about MK 2866.

What Is Ostarine (MK 2866)?

Ostarine is among the most well-known and commonly used SARMs. It’s been clinically proven to be an effective muscle-building supplement that also aids in weight loss and endurance improvement with minimal adverse effects, unlike unauthorised steroids.

How Does Ostarine (MK 2866) Work?

Ostarine functions similarly to steroids, but is more selective than steroids. Because it only binds to the androgen receptors in the muscles and tissues while avoiding the receptors in your organs, it has fewer adverse effects than steroids do. This is due to the fact that it selectively binds to androgen receptors in the muscles and tissues.

What Benefits Can You Get from Ostarine?

Ostarine has immediate and long-lasting effects when it binds to androgen receptors in the body, directly targeting the muscles in your biceps, triceps, chest, legs, and back. According to research from clinical trials, taking a moderate dose of Ostarine, which is 25 milligrams per day, can rapidly increase your muscle mass, remove fat, and make you stronger overall.

What Is the Best Ostarine Stack?

Depending on your objectives, you can tailor the Ostarine cycle or stack you will follow. If you wish to lose weight, combining this supplement with Stenabolic (SR9009) or Cardarine is recommended. If you want to gain mass, we recommend RAD 140 or LGD 4033.

What Is the Proper Ostarine Dosage?

The recommended dosage range for Ostarine is 10mg to 30mg; however, it is best to begin with a low dose but if you’re a beginner in order to determine your body’s tolerance to such compound.

What Is Ostarine’s Half-Life?

The half-life of Ostarine is 24 hours, which indicates that 50% of MK2866 will indeed be eliminated from the body after one day. Because of this, it is advised that you only take your dosage only once twenty-four hours. It will take approximately one week for all traces of Ostarine to leave the body.

Can Ostarine Cause Cancer?

Definitely not. Genuine Ostarine has no association with cancer.

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