MK-677 which is also known as Ibutamoren or Nutrobal is a Selective Androgen Receptor Modulator (SARM). Most newer SARMs are non-steroidal but have similar anabolic properties to steroids. MK-677 and most SARMs differ from steroids by how they bind to androgen receptors (ARs). Most of the popular steroids are full agonists of the ARs however, non-steroidal SARMs selectively bind to specific ARs due to their unique chemical composition.The majority of SARMs developed target primarily lean muscle mass and bone tissues. It has a high affinity for ARs in lean muscle and bone tissue and a lower affinity in other tissues.
MK-677 Nutrobal is sold for research purposes only and is not be utilized for any other purposes, including, but not limited to, in vivo diagnostic purposes, in foods, in drugs, in medicinal devices, and/or cosmetics for humans and/or animals.