What exactly is Ostarine
It is an illegal substance. It was a drug developed by the pharmaceutical Merck that focused on increasing muscle mass and bone density in humans, either for osteoporosis, or in elderly people who make cachexia, muscle mass loss.
Is it an anabolic steroid?
No, it is an androgen receptor modulator. Ostarine MK2866 works on certain receptors that increase muscle mass, but it is not like testosterone. It will not have the same side effects, it does not cause atrophy [sexual glands]. It is less powerful and effective than steroids, but it is more subtle and less dangerous. It is less bad than other steroids, but it is still a substance that has not been approved.