Clinical trials to determine Melanotan-2 side effects were done and as expected the peptide did tan skin but had a few interesting side effects.

In studies, the Melanotan II dose was up to 3mg.

There were side effects but they were not reported in the group that took 1mg.

Higher doses of 2.5mg is where they found potent libido action and spontanious erections..

MT2 was so effective as a sexual aide, libido enhancer that they developed a sister peptide PT-141 to deal with erectile dysfunction.

The difference being the users did not get a tan.

PT-141 (Bremelanotide) is another similar synthetically produced variant that received a lot of funding. Bremelanotide soon became a leader in the crusade to find an effective treatment for sexual dysfunction.

Melanotan 2 Before and After

Known as the Barbie drug MT2 has been sold as tanning injections and in nasal sprays.

Originally it had been developed for protection from sunlight. This hormone aids skin cells to produce greater quantities of Melanin.

Melanotan 2 before and after UV exposure concluded than a noticeable natural tanning effects occured. 

Melanin is a pigment in the skin that gives a tan and therefore protection from sun exposure.

The end results saw skin tones that usually involved UV rays from sunlight or tanning sessions.