Avoid nasal tanning sprays or nasal tanners entirely. These products promise an all over tan without sun exposure but they are unregulated, can be unsafe, and contain potentially risky substances like Melanotan 2. Melanotan What It Is and Its Relation to Skin Cancer Melanotan What It Is and Its Relation to Skin Cancer Health expert says Melanotan II darkens skin moles and can make melanoma hard to detect Herald Sun Rise in use of 'dangerous' tanning injection Channel 4 News