Tattoos are increasingly popular. Every eighth person in Germany has already felt the sting of getting a tattoo. A recent representative survey of the Federal Institute for Risk Assessment (BfR) revealed that nearly 90% of tattooed individuals considered them harmless to one’s health. Yet, if tattooed people are to be examined with magnetic resonance imaging (MRI), the question often arises of how risky the procedure is for them. The first prospective study with statistically verifiable numbers has now been presented by a research team led by Nikolaus Weiskopf in the prestigious New England Journal of Medicine.