PT 141 (Bremelanotide) You Should Avoid Using Nasal Tanning Sprays Wholesale PT141 Powder High Quality Skin Whitening Ingredient How Long Does PT 141 Last? Duration and Timing Guide Inner Balance 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.