Viral 'Barbie drug' for tanning can cause brain swelling and even cancer, experts warn Nasal tanning sprays linked to skin cancer, trading standards officers warn Consumer affairs The Guardian In a major policy shift, the U.S. Food and Drug Administration is reconsidering restrictions on several controversial peptides, including trending compounds like BPC 157 and Melanotan II. The move comes as demand for Melanotan II: Tanning injections, nasal sprays harmful to health Melanotan II (Tan Jabs): Why They're Not Worth The Risk Tanning, fake tan and Melanotan Cancer Research UK