Tattoo ink contains cancer-causing chemicals – so why isn't it regulated?

The US is a major global supplier of tattoo inks, and yet little data exists about their impact on our health. That’s worrying regulators in EuropeAmericans love tattoos. Nearly a quarter of them have gotten inked, compared with 12% in Europe. The personal expression that is skin deep is particularly popular with young people: 40% of American teenagers sport tattoos. Women are also more likely than men to get one.Yet very little is known about the effects of modern day tattoo ink on the hu