THIS PRODUCT IS INTENDED AS A RESEARCH CHEMICAL ONLY. This designation allows the use of research chemicals strictly for in vitro testing and laboratory experimentation only. All product information available on this website is for educational purposes only. Bodily introduction of any kind into humans or animals is strictly forbidden by law. This product should on be handled by licensed, qualified professionals.

SKU: MK-2866 Category:


Concentration 30 mg per mL
Size 900 mg / 30 mL
Stability Room Temperature
Physical Appearance Clear Liquid
Molecular Formula C19H14F3N3O3
LC-MS & HPLC 99% Purity

About MK-2866

Ostarine MK-2866 is one of the best options for selective androgen receptor modulators (SARMs). They are very potent when it comes to bulking and can be well-stacked with other supplements and research compounds. Athletes can also use it in body recomposition and cutting. When stacked with other supplements, you are guaranteed the best results from every component of your stack. Let’s look at the Ostarine MK-2866 compound and its potential benefits, side effects and correct dosage.

What is Ostarine MK 2866

Ostarine MK 2866 is a selective androgen receptor modulator; therefore, it is a class of therapeutic compounds possessing similar anabolic properties to commonly used anabolic steroids. However, it doesn’t trigger the same side effects associated with anabolic steroids. GTx, a pharmaceutical company, developed Ostarine MK 2866, initially targeted to prevent osteoporosis and muscle wasting. It is associated with many names, the most common one being enobosarm. Since it falls in the category of SARMs, it’s critical to note that the FDA hasn’t approved selective androgen receptor modulators; hence, they are currently classified as research compounds. They are also not approved by WADA. Despite that, there have been impressive benefits to athletes who have used the research compound. Even though SARM compounds like Ostarine MK 2866 don’t have side effects caused by anabolic steroids, it’s advised for athletes to go for a PCT after completing their cycle. The PCT will ensure one keeps the gains they acquired during the cycle.

Chemical Structure of Ostarine MK 2866

  • Application: Binds to androgen receptors
  • CAS:   841205-47-8
  • Molecular Weight: 389.334 g/mol
  • Chemical Formula: C19H14F3N3O3
  • Chemical Name: Enobosarm
  • Synonyms: GTx-024; MK-2866; Ostarine; S-22

Benefits of Ostarine MK-2866

Athletes are slowly growing fond of the Ostarine MK-2866 because of its excellent benefits when bulking and shredding. Taking Ostarine MK-2866 as part of your fitness supplement has suggested triggering the following key benefits:

  • Enhances the growth of lean muscle mass.
  • Improves physical functions.
  • Prevents and reverses muscle wasting
  • Increases strength, endurance and power.

Ostarine MK-2866 Side Effects

Since Ostarine MK-2866 is a selective androgen receptor modulator, it has the benefits of anabolic steroids but doesn’t have its side effects. Nevertheless, when it comes to side effects, most side effects are predominantly determined by the body’s metabolic reaction to the compound. Some users can report mild to no side effects, while others can report severe side effects. If one experiences severe side effects, one should stop using the SARM compound. To be on the safe side, it’s best to consult with your doctor before starting your Ostarine MK-2866 cycle.

Since SARM are more selective, unlike anabolic steroids, they have fewer side effects. The most common side effects which are associated with Ostarine MK-2866 are:

  • Stomach pain,
  • Constipation,
  • Nausea
  • Headaches,

Most of the time, side effects are triggered when one consumes higher dosages of the compound. Reducing the dosage can reduce the side effects or eliminate them.

Ostarine MK-2866 Dosage

The correct dosage of any supplement or research compound ensures you get maximum results from the compound and protects yourself from possible side effects associated with the compound. Athletes have different goals when taking a research compound and supplement; the same applies to Ostarine MK-2866. Apart from the fitness goals, the gender of the user will also play an important role, with women being advised to take smaller portions of the compound.

Male athletes in their bulking stage will be advised to take higher doses of Ostarine MK-2866, not exceeding 25mg per day, while those in their shredding phase will take smaller doses, up to 15 to 20mg daily. Female athletes in the bulking stage should stick to a maximum daily dosage of 10mg of Ostarine, and those in the shredding stage should follow a daily dosage of 7.5mg to 10mg.

The Ostarine MK-2866 cycle is also a central part of the dosage. The cycle refers to how long you will use the compound, which differs depending on the fitness goals. Athletes in the bulking stage will have a cycle lasting between eight to ten weeks, while those in the shredding phase will last between four to eight weeks. While most people use the Ostarine MK-2866 compound primarily in the shredding and bulking phases, the compound is also used in dealing with body recomposition.

When using the compound to deal with body recomposition, the recommended daily dosage should be for men (12.5mg to 25mg) and women (5mg to 12.5mg). The recommended duration for this cycle is between four to eight weeks, the same duration as in the cutting phase.

Stacking Ostarine MK-2866

Stacking supplements is one of the simplest and most effective ways of obtaining maximum benefits from different supplements and research compounds. Stacking is very common in the fitness industry. You can stack Ostarine MK-2866 with supplements or other SARMs. Below are the top SARM compounds you can stack with Ostarine MK-2866 and get maximum results. 

Cardarine (GW 501516)

Cardarine is a popular selective androgen receptor modulator with many health benefits. Research studies confirm that the compound can enhance heart health and deal with obesity. Patients who used the compound experienced improved cardiovascular protection. When paired with Ostarine MK-2866, the combination can facilitate effective body fat loss and lean muscle mass gain. The cycle will last eight weeks, and the recommended daily dosage of Ostarine is 20mg. But novice users of SARM compounds should start at a lower dosage of 10mg in the first week. After that first week, they can move to a daily dosage of 20mg. For cardarine, a recommended daily dosage of 10mg to 20mg is recommended. Starting with a lower dosage and moving to a higher one is the best way.

LGD 4033 (Ligandrol)

Ligandrol is one of the best SARMs for athletes looking to gain muscle mass and increase strength. Combining Ligandrol with Ostarine is the best stack combination for athletes in their bulking phase. The combination also helps in boosting sex libido in male athletes. The cycle will last eight weeks using the Ligandrol with the Ostarine stack combination. In the first week, the recommended daily dosage is Ligandrol (5mg) and Ostarine (10mg). In the second week, the daily dosage moves to Ligandrol (10mg) and Ostarine (20mg), starting with lower dosages that allow the body to quickly get used to the compounds. After finishing their cycle, athletes are encouraged to go for PCT and wait for a few weeks before starting their next cycle. 

Cardarine and Andarine

The last stack combination is slightly complex since it combines Ostarine with two other SARM compounds. In this stack combination, you will maintain a daily dosage of 20mg for Ostarine, but with the other SARMs, you will have to start with lower doses. Cardarine starting daily dose will be 10mg which can be increased to 20mg after the first week. On the other hand, Andarine starting daily dosage will be 25mg. You can amp the dosage to 50mg after the first week. Undergoing a PCT and taking a few weeks breaks between cycles is recommended to ensure maximum results from the stack.

Even though Ostarine MK-2866 remains unapproved by FDA and WADA, brands selling it are listing it as a research compound. Athletes and bodybuilders can still use the compound to achieve impressive lean muscle mass gains. Stacking the SARM compound has been known to enhance the effectiveness of the compound. Even though the compound is still recommended for research, some athletes are using it and have reported impressive gains. Getting the best out of Ostarine MK-2866 is only possible when you purchase it from reliable and trusted supplements and SARM retailers.

Achieve your bulking and shredding goals by using Ostarine MK-2866. Despite achieving benefits similar to anabolic steroids, you don’t have to worry about the side effects of anabolic steroids.

Additional information

Weight 0.15625 kg