Ostarine (MK-2866)

MK-2866 is a Selective Androgen Receptor Modulator. A SARM is exactly what it sounds like: a compound (not an anabolic steroid) which has the ability to stimulate the androgen receptor (much the same way as anabolic steroids)

Prohormones Database Description

Ostarine (MK-2866)

Ostarine is a new era of muscle building supplements know as ‘SARMs’ –  Selective Androgen Receptor Modulators. Scientific research suggests that not only does Ostarine represent a new potential treatment for a wide spectrum of conditions such muscle wasting diseases (from age-related to serious illness) but is also has huge potential for muscle building for bodybuilders & fitness athletes alike. Furthermore, Ostarine can even be used to minimize muscle wastage during recovery periods from serious surgery or between hormonal cycles.


The gains that are made from Ostarine are very easily maintainable and progress continually throughout the cycle. Although the gains may not be as dramatic as prohormones, the gains are composed exclusively of lean muscle tissue. In other words there’s no water retention or bloat and side effects are commonly very low or even non-existent. Early feedback suggests that 18-20mg per day is the ‘sweet spot’. Users are recommended NOT to exceed 20-25mg of Ostarine per day, especially if Ostarine is being used as part of a PCT. Above this dosage Ostarine can become mildly suppressive and gains are not likely to be increased further.

No steroids

Ostarine is able to increase protein synthesis and muscle growth by stimulating the androgen receptor, much in the same way as both prohormones and anabolic steroids do. However, Ostarine has some significant advantages over anabolic steroids (AAS). Unlike AAS, Ostarine, when dosed appropriately does NOT have any measurable effect on Lutenizing Hormones (LH) or Folliclie Stimulating Hormones (FSH). Furthermore, Ostarine exerts its anabolic effects almost exclusively in muscle tissue. Why does this matter?

When synthetic hormones  are added to your body hormone levels rise rapidly. In response your body reduces or even stops it’s natural production of endogenous hormones. As a result PCT is always recommended when using prohormones or AAS. However, when using a SARM such as Ostarine this isn’t necessary! Due to the fact that your body isn’t overwelmed  your body is able to continue producing its own natural hormones. In the case of SARMs the receptors which respond to testosterone are stimulated but not at the expense of your body’s own natural hormonal production. Furthermore, Ostarine doesn’t produce the possible side effects associated with elevated hormone levels that steroid use can cause. In other words you get the anabolic benefits without the unwanted side effects.

Active ingredients ((2S)-3-(4-cyanophenoxy)-N-[4-cyano-3-(trifluoromethyl)phenyl]-2-hydroxy-2-methylpropanamide) 10 mg
Names Ostarine, Ostabol, MK-2866
Amount 90 caps
Brand Brawn Nutrition
Methylated No
Sport Bodybuilding
Goal Bulking, lean muscle gain
Legal status UK Legal
Legal status USA Legal
PCT required Yes
Side effects Mild