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 Insights into Tanning Biology and Tanning Products JCAD The Journal of Clinical and Aesthetic Dermatology Melanotan II (Tan Jabs): Why They're Not Worth The Risk Melatonin partially rescues defects induced by tranexamic acid exposure during oocyte maturation in mice American Journal of Physiology Cell Physiology American Physiological Society Avoid nasal tanning sprays or nasal tanners entirely. These products can produce nasty side effects, such as nausea and vomiting, high blood pressure, respiratory issues, and even links to skin cancer. Nasal