PT-141 is a synthetic peptide made to help treat low sexual desire in women and ED in men. The peptide is a synthetic version of the naturally occurring alpha-melanocyte-stimulating hormone (α-MSH), which regulates various physiological processes in the body, such as appetite, immune function, and sexual behavior. Benefits include: Improved penile look and feel: fuller, thicker and firmer, Helping boost sexual desire and better sexual performance, Aiding in sexual arousal and providing youthful emotion response.