Ostarine Ostabolic (MK 2866)

I am excited to bring you one of the best performance enhancing SARM’s (selective androgen receptor modulator’s) available on the market.  Ostarine Ostabolic (mk2866) has been growing in popularity in recent years in the fitness community as users have tapped into its potential.  In this article, I will tell you why you are missing out by not utilizing this compound.

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Originally under development by the mega-billion dollar pharmaceutical company Merck, it is now in clinical testing phase by a company called GTX, Inc.   The goal is to create something that helps with bone, muscle, and  disease wasting issues.  In the past 5-10 years, athletes of all backgrounds have discovered Ostarine Ostabolic (mk2866) and have started using it for various help in reaching their fitness goals.

“We are encouraged by results of this Phase II trial in patients with cancer cachexia, where Ostarine showed significant improvements in lean body mass in both treatment cohorts,” said Mitchell S. Steiner, MD, CEO of GTx. “We look forward to our continued partnership with Merck on the SARM program, and to evaluating the full potential of our lead product candidate Ostarine in conditions such as cancer cachexia, sarcopenia, and other muscle wasting conditions.”

Action in the body

Ostarine Ostabolic (mk2866) does what all SARM’s (selective androgen receptor modulator’s) do, which is bind to the androgen receptor selectively.   The end result is a safe and mild anabolic response with muscular and bone activity.

ostarine results - before and after


When it comes to weight training, you can expect a boost in protein synthesis, lean muscle mass gains, recovery, strength gains, and strengthening of soft tissues without the negative side effects of hormones. 

Users who use it to bulk report gains of 3-8 pounds of lean muscle mass on a cycle along with moderate strength gains, without adding body fat.  You can also use Ostarine Ostabolic (mk2866) to shred down because it works so well in a caloric deficit and you won’t lose muscle mass.  Those who use it for cutting will report losing 1-4% body fat in a cycle, while still keeping precious muscle.

And keep in mind results from Ostarine Ostabolic (mk2866) are more keepable, than those of anabolic steroids, due to the mild nature of the compound.

Comparing to anabolic steroids

Ostarine Ostabolic (mk2866) does not cause the problems you get from anabolic steroids because of its selectivity in the body.   I’m not saying that it will give you the strength or size gains of steroids in a short timeframe, but I am saying over the long term you can get just as good results with way fewer headaches.  Anabolic steroids can cause a host of problems including:

  1. Permanent sexual and reproductive dysfunction
  2. Shutdown and/or suppression of the pituitary glands
  3. Enlarged prostate
  4. Head hair loss
  5. Skin problems like oily skin and acne
  6. Aggression issues
  7. Extreme heart strain
  8. Liver toxicity
  9. Insomnia
  10. Water retention
  11. Gynecomastia (bitch tits)
  12. Abscesses and infections from injecting

How to use Ostarine

How to use on a steroid cycle stack

Those who prefer to be aggressive and use steroids will use Ostarine Ostabolic (mk2866) to add to results, without adding to side effects.  This is a smart thing to do which I feel is not being done enough.

Also, as mentioned above, one of the coolest things about this compound is its ability to heal soft tissues.  Keep in mind anabolic steroids actually strain soft tissues, so stacking in Ostarine Ostabolic (mk2866) will be the best thing you could for your joint health.  I highly recommend those who hit the gym hard on any steroid cycle stack it in at 25mgs per day.

How to use on a SARM’s stack

Ostarine Ostabolic (mk2866) is a popular addition to any SARM (selective androgen receptor) stack.

A popular way to use it would be stacking it at 25mgs per day with Cardarine GW501516 at 20mgs a day for fat loss. For those who want to heal joints, stack 25-50mgs per day along with Ligandrol LGD4033 (anabolicum) at 10mgs per day.

How to use during post cycle

One of the unique things about Ostarine Ostabolic (mk2866) is that it is not suppressive when used at a conservative dosage for 4 weeks or less.  This means that yes you can stack it in your post cycle therapy at 25mgs or less.  It will help you with joint health, muscle wasting, and aid in keeping your strength.

How to use as a stand-alone

Ostarine Ostabolic (mk2866) is also used by itself for those who just want good clean gains in the gym or those who want to give their soft tissues some strengthening.

A good dose for either is 25-50mgs per day. 


Powerlifters put tremendous strain on their soft tissues, ligaments, and tendons. In fact, they frequently have severe injuries that can put them out of the gym for weeks or even months.

Ostarine Ostabolic (mk2866) is a really good idea if you like to lift heavy at the gym. Because it will not only help with your soft tissues but it will also aid with recovery.

Side effects

Ostarine Ostabolic (mk2866) is side-effect free for the most part.  Users who choose to run it at more than 4 weeks will need to run a mini-post cycle therapy.  I recommend a bottle of hcgenerate ES for 4-8 weeks.

Female use

Ostarine Ostabolic (mk2866) is completely safe to use for females.  In fact, it one of the most popular SARMs due to the results and mildness.  A simple dosage that will yield sensational results is 12.5-25mgs per day. Many females also choose to stack in either SR9009 (stenabolic) or Cardarine (GW501516) due to the fat loss benefits.

Half-life and detection times

Half-life is thought to be around 24 hours, so a dosage of 1-2X per day is plenty.  Detection times are not known but we suspect it is about 3-4 weeks.  Therefore, if you are a tested athlete it is important to stop using it 1 month prior to your doping test since it is a banned substance.

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Where to find

In recent years, financial institutions and the government have started to crack down on the sale of Ostarine Ostabolic (mk2866).  Some companies continue to sell it but they have been known to lace their products with prohormones or just some herbs.  It is important to always remember to find an approved source to avoid being ripped off.

Ostarine & M1-MK Bulking Stack


Lean Muscle Mass Gains


Strength Gains




Fat Loss


Strengthening of Soft Tissues

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