PT 141 isnt a usual libido booster., Its a brain activator., This peptide works centrally in the nervous system, not on hormones., No testosterone spike., No estrogen manipulation., PT 141 Melanotan II for erectile dysfunction How do we enhance libido?! PT 141 and Melanotan 2 (MT2) are both good options. PT141 and MT2 both work on the hypothalamus to increase libido. This increase can cause more spontaneous erections in Melanotan II improved sociability index scores but did not affect Download Scientific Diagram Melanotan II 99%+ Pure Peptide Amino Club Amino Club Melanotan 2 Cyclic Heptapeptide for Melanocortin Research