There are two peptides people talk about for tanning: Melanotan 1 and Melanotan 2. Melanotan 1 works slower and mainly targets the skin, leading to a more gradual and even increase in A para aortic malignant melanotic nerve sheath tumor mimicking a gastrointestinal stromal tumor: a rare case report and review of literature BMC Surgery Springer Nature Link Peripheral nerve tumors Symptoms and causes Mayo Clinic Frontiers Case report: A rare case of massive peripheral nerve melanotic schwannoma and review of the literature NEUROSARCOMA (MPNST) Hand Surgery Resource