Ostarine (MK2866) Review: Benefits, Side Effects and Best Place To Buy


Ostarine is a drug that is still undergoing trials by its creator company — GTX Inc. that’s located in Memphis, Tennessee. It falls under the category of SARMs (selective androgen receptor modulators), a new hit in the fitness world. We will try to explain how to properly use Ostarine during the bulking and cutting phases, as well as during body recomposition.

As it usually happens, medicinal advances have a carryover to bodybuilding. Such is the case with Ostarine (mk2866, being Ostarine’s generic name), which was originally meant to serve as a treatment against osteoporosis and prevent muscle wasting diseases in cancer patients. You already know where this is going.

We will start this article with some basic info about them. Here, you will see what they are, how they work, and what applications they have. In this part, you will also be able to understand how the regulation of these substances works. After that, the focus will shift to medicinal gtx-024. The biggest part, however, will cover Ostarine use in the fitness community and how effective it really is. We will try to explain how to properly use MK-2866 during the bulking phases, as well as during body recomposition. This is the heart of the article, and if you aren’t interested in the review of the medicinal purpose, the science, or regulation, we recommend skipping to that part now.

What are SARMs?

They are a relative newcomer to the fitness scene. We use the word “relative” since the steroidal SARMs have been around for decades. Nonsteroidal ones, however, are new and untested. The word itself is an acronym that stands for Selective Androgen Receptor Modulator. The main difference between nonsteroidal SARMs and steroids is the scale on which these supplements operate. Testosterone in the form of steroids cannot have a targeted function, while it can be used to affect particular types of tissue by selectively targeting receptors in various tissues differently. This means that they can have an effect on muscles only, with limited or no effects on the endocrine system. A popular comparison exists on the web: “If steroids are carpet bombs, SARMs are laser-guided bombs.” And it makes perfect sense.


This is why the World Anti-doping agency has banned SARMs as of 2008. Examples of professional athletes using Enobosarm are Joakim Noah from Chicago Bulls and Florida Gators QB, Will Grier. Noah received a 20 game suspension in 2017. Grier’s case is controversial to this day without having had any sort of closure.

Ostarine is prohibited under the S1 Anabolic Agent category of the WADA Prohibited List. The number of positive tests involving Ostarine has increased steadily over the past few years, with WADA reporting 28 all over the world in 2015.

Medicinal usage 

In an article written by Shalender Bashin, MD, and Ravi Jasuja, Ph.D., the following summary is stated: “these substances hold promise as a new class of function promoting anabolic therapies for a number of clinical indications, including functional limitations associated with aging and chronic diseases, frailty and cancer cachexia,”

Further down the study, we can find that the therapies for these conditions revolve around tissue-selective activation and limited hormonal changes. Since Ostarine produces no virilization, MK 2866 is safe for women as well.

As we grow old, we lose skeletal mass due to the loss of type 2 muscles. This, in turn, increases the risks of falls, fractures, mobility limitations, physical disability. Our quality of life will suffer. Certain chronic illnesses, such as end-stage renal diseases, obstructive lung diseases, and heart failure are punctuated by the loss of mass. Its ability to reverse muscle wasting also makes it a potentially vital medication for cancer patients. Mk-2866 can prevent the collapse of a functioning human skeletal system and prevent these problems from ever happening.


Mk-2866 in the fitness community

Enobosarm is probably the most popular selective androgen receptor modulator in the fitness community and very effective. The drug has undergone a few clinical trials including one that involved 159 cancer patients where the drug showed promising results. Its main strength lies in the fact that the compound has an anabolic effect with no aromatizing side effects. That means that MK-2866 targets androgen receptors but does not convert into estrogen. The drug does not contain the problematic metabolite MI. On the other hand, Ostarine will:

  1. Increase your lean muscle mass
  2. Increase your lifts
  3. Increase your endurance and stamina
  4. Improve your bone density

Ostarine is probably the best and the safest SARM on the market. You can expect the same results using this product like the ones you can obtain from a cycle of Dianabol without all the bad side effects.

MK-2866 will bind to these receptors, but it will not convert DHT into estrogen. As we all know, aromatization is the main problem of using steroids. With this problem out of the picture, Ostarine and other SARMs will dominate the PED market in the years to come.

How does it work?

If we compare ostarine MK-2866 to “testosterone boosters” and steroids, we will notice that Ostarine does not have an effect on non-skeletal muscles. Gtx-024 will increase your performance and build lean muscle mass.

Since most bodybuilders still live by their bulking and cutting cycles, we will break down the proper usage of MK-2866 for each of them.


Experts recommend a 4–6-week cycle of MK-2866 for optimal results while taking one dose of 24–36 mg per day. with a half-life of roughly 24 hours, there’s no point in taking the drug more than once per day. Gaining 15 lbs of lean mass with no water retention is a perfectly achievable reality in this time frame. A lot of people worry about losing their new muscle gains after the cycle ends. You can alleviate this problem by taking Clomid or Tribestan in your last week of the cycle. This way, you can be sure that no muscle wasting will occur once you stop.

As we’ve mentioned before, ostarine MK-2866 does not have any aromatizing side effects. You will not grow man boobs or lose your hair. That is why this SARM is so awesome to increase testosterone levels.

Pro tip: Preload your intake. Start with 50% of the dose on week 1 and gradually increase it in the following weeks. Your results will improve considerably.

If you are interested in the biggest results possible, use a combination of Ostarine, RAD-140Ligandrol, and Ibutamoren. You will experience deeper, high-quality sleep using this combination of these substances and some insane muscle building while staying relatively lean.


Remember when we said that these research chemicals were originally designed to prevent muscle wasting? This is why they are perfect for your cycle. While running a caloric deficit, the body takes away nutrients not only from its fat deposits but from the mass as well. This is how muscle atrophy happens on a cut. Since we all want to show our newly acquired muscle gains, losing them is not an option. Mk-2866 can help you here as well. Using 15 mg per day of this substance is recommended. Remember not to overdo your strict cardio routines and focus on strength and circuit training. This is the way to maximize your results.

Most bodybuilders reported incredible results by stacking MK 2866 with a few other SARMs while cutting. This delivers even more dramatic results whilst preventing muscle loss. Probably the best combination is the one involving Andarine, Ostarine, and Cardarine. The total dosage of these three liquids should not exceed the recommended dosage for only using Ostarine.

Treating injuries with Ostarine

Ostarine has beneficial effects on bone density and on joint and tendon health. This process has a carryover effect on joints. Stronger joints and tendons mean better workouts. However, this does not mean that you can throw proper form out of the window and go all out on the weights. Training smart is the basis for your progress, and Mk-2866 is its best addon. If you have an injury, most researchers point out that the proper Ostarine dosage for the healing process is 12.5mg a day.

Body Recomposition

Fitness routine for the out-of-the-box thinkers, as some like to call it, is gaining popularity nowadays. It is especially welcoming to beginners who haven’t experienced their “noob gains”. MK-2866 promotes fat loss while facilitating the gaining of moderate amounts of lean muscle mass. Since these two processes are hard to combine for non-enhanced experienced bodybuilders, Ostarine comes into play.

Staying just a bit over your maintenance calorie intake while using this SARM will allow you to recompose your body, even if you have been lifting for years. Don’t expect to gain as much lean muscle mass as on a pure bulk or lose as much as on a cut, but you will add a few pounds while losing a couple of inches of your waist.


This SARM will cause almost no testosterone suppression unless you start to take ridiculous amounts daily. If you stick to the normal daily Ostarine dosage, you won’t experience any suppression of hormones after your cycle of MK-2866.

Side effects of MK2866

I have mentioned a couple of times that MK-2866 has no steroid-like side effects due to the compound not having aromatizing qualities. But it is important to mention that GTX Inc. has never released the full ingredients list for Ostarine. Anecdotal reports and a few of the clinical trials conducted provide us with stories of heatwaves, headaches, sweating, lethargy, and disrupted sleep. However, these side effects of Ostarine aren’t nearly as serious as the ones steroids can have.

Is PCT Needed?

No, you don’t need a PCT cycle when finishing a cycle. A few guys run post-cycle therapy anyway just to play it safe. Some might also opt for a pct cycle when they use a higher amount.

In conclusion — OK, but should I get Enobosarm?

This is a complex question, or rather a question with a complex answer. Is ostarine MK-2866 effective? Does the drug increase your performance? Absolutely. But it depends on a lot of factors, including — years spent training, age, testosterone levels, injuries, and how adventurous you feel. All the data so far shows that there are no short-term or long-term side effects to taking Ostarine. If you are a young guy in his early twenties who just started working out, the answer is no. You will not need performance enhancers in the years to come. On the other hand, if you’re an experienced bodybuilder and you’ve maxed out your genetic potential, have a low testosterone count, or are experiencing injuries, mk2866 is your best friend.

You can stack Enobosarm 6 with for example Ibutamoren, which will increase your longevity.

Reading through this article may set your mind on whether or not to take Enobosarm. However, there are some rules you need to follow if you want to start consuming Ostarine. First, don’t buy the compound from shady websites. Second, don’t buy the drug from even shadier locker room guys. Third, consult your physician before beginning your cycle. Fourth, don’t mix Ostarine with injectables. Fifth, don’t spout unsolicited advice to younger guys about taking these substances.

These rules apply to every single PED out there. Just because this SARM is safer than all of them doesn’t mean you should throw them out of the window. Having successful training means using your brain, doing your research, getting that perfect diet plan and training smart. Mk-2866 is not illegal for now, but it will be sooner or later.

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