Your body already makes a hormone that tells your skin to tan. Melanotan 2 is a synthetic peptide engineered to mimic that hormone but in a version that's more potent and Tanning from the inside out = Highly Dangerous and Illegal!, Many products advertised on social media platforms promising a tan from the inside out or a tan without sun such as injectable Can You Use Melanotan If You Have Very Fair Skin? Insights into Tanning Biology and Tanning Products JCAD The Journal of Clinical and Aesthetic Dermatology Tanning, fake tan and Melanotan Cancer Research UK Viral 'Barbie drug' for tanning can cause brain swelling and even cancer, experts warn