Melanotan is a synthetic analogue of the natural melanocortin peptide, which has a stimulating effect on the synthesis of melanin, which, in turn, determines the intensity of tanning.
 
pigmentation of the skin due to the formation of melanin (pharmacological sunburn);
increased libido, stimulation of erection (the effect is noticeable already 2 hours after the injection;
appetite suppression;
stimulation of lipolysis.