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 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 2 Cyclic Heptapeptide for Melanocortin Research Melanotan II improved sociability index scores but did not affect Download Scientific Diagram PT 141 10mg Bremelanotide Peptide Peptides World