ACE-031 is a soluble form of activin receptor type IIB. ACE-031 supports muscle growth by attaching to myostatin and other negative regulators of muscle mass. This research peptide is used for investigational study only by professionals in this industry. Studies and ongoing tests, so far have determined it to be a potent peptide with the ability to increase mass in muscle cells. With these findings, it could mean help a future treatment for muscle wastage diseases and more.