Melanotan What It Is and Its Relation to Skin Cancer Melanotan II (Tan Jabs): Why They're Not Worth The Risk N Acetyl Semax Amidate Nasal Spray 12 mg (10 mL) VPeptide N Acetyl Semax Nasal Spray Canada: Ultra Pure Peptide for Cognitive, Anxiolytic & Neuromodulation Research 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.