Moles (melanocytic naevi, pigmented nevi) Melanotan is trending again. As a dermatologist, I strongly need to tell you It's an unapproved injectable peptide, and we're seeing: nausea and flushing darkening of existing moles Melanotan 2 is an unregulated, unsafe substance often advertised as a self tanning aid., Use of Melanotan 2 has been linked to serious side effects including loss of vision, moles, stroke, muscle Melanoma Guide: Causes, Symptoms and Treatment Options How Can You Tell if It's Melanoma or Just a Mole? How Can You Tell if It's Melanoma or Just a Mole?