• Action
• Dosage




Ostarine (MK-2866, GTX 024 and enobosarm) is a selective androgen receptor modulator (Selective Androgen Receptor Modulator). This is the substance ultimately aimed at the medical use during osteoporosis and the destruction of muscles by chronic diseases, as an alternative to anabolic steroids.




Ostarine affects the androgen receptors in the body, however, thanks to its characteristics it does not wield negative influence referring to steroids as estrogen convertion, raised prolactin or virilization.

No blocking of the HPTA or intensification of collagen synthesis are another aspects, which place the center higher than the anabolic steroids.



It is worth noting that ostarine has confirmed medical use and a number of tests defining the safety of use. In medicine it has been used as a medicine reconstructing muscle mass loss in a long-term treatment caused by devastating diseases such as Parkinson's disease, osteoporosis or some tumor stages.



The amount of 3 mg of MK-2866 per day showed an impact on weight increase of 300% compared to placebo. This gives amateur athletes more room for maneuver and safety in contrast to anabolic steroids. Ostarine is characterized by a huge increase in muscle endurance, increased synthesis of collagen and anabolic activity allowing for the development of muscle mass and strength.



During using MK-2866, there are opinions of the occurrence of gynecomastia after receiving higher doses for a longer period of time. For this reason, it is worth to think through if you are planning a longer cycle of use of aromatase inhibitors.

Ostarine has no effects on the levels of sex hormones. The use of 28-30 day cycles at doses of no more than recommended, does not oblige to use PCT.




Doses vary depending on purpose and so:

  • 10 mg, if we want to improve the condition of joints and the overall efficiency of collagen production
  • 15-20 mg is the basis to achieve lean body mass
  • 25-35 mg, if you want to achieve a spectacular performance of muscle mass and strength

Ostarine has about 24 hours half-life in the body, so it can be used once a day.




  • Recomposition / reduction: Ostarine + Andarin / Cardarine (20 mg + 50 mg + 20 mg)
  • Muscle mass increase: Ostarine + LAG (20 mg + 5-10 mg)
  • Between the SAA cycles: Ostarine (25 mg)
  • Muscle strength increase: Ostarine + RAD (20 mg + 20 mg)




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