MT 2 10mg Amino Nation Tanning from the inside out = Highly Dangerous and Illegal! Many products advertised on social media platforms promising a tan from the inside out or a tan without sun such PT 141 (Bremelanotide) is a synthetic peptide developed from Melanotan 2 (MT II). PT 141 was recently approved for the treatment of HSDD (hypoactive sexual desire disorder) in women. PT 141 is a peptide that was MELANOTAN 1 (10mg) stimulation of melanin synthesis.