SΑRM stands for Selective Androgen Receptor Modulator. They are a group of compounds that selectively target Androgen Receptors in muscle, bone, connective tissue, body fat and nerves. Each SARM targets different groups of Androgen Receptors which amplifies the tissues natural response to any type of physical output, with research revealing powerful results. Buy high quality american SARMs in USA - Canada - Australia and get real results. As research about SARMs continues to grow, SarmsUP will continue to supply the highest quality SARM in USA.