Regret was for many years considered the most severe side-effect of tattoos. But my new study suggests there could be much worse things to worry about than that.
Tattoos are now a mainstream means to express identity or celebrate milestones in life. Yet we know very little about the long-term health effects. Hazardous chemicals in tattoo ink have received attention in Europe during the last ten years. In parallel, research has shown that the ink that is injected into the skin does not stay there.
