Tattoo inks may have cancer-causing chemicals, study shows

(NewsNation) — Researchers studying the composition of tattoo inks have discovered that those used in the United States may contain cancer-causing chemicals.In the study presented this week at an American Chemical Society conference, Dr. John Swierk said little is known about the chemical composition of inks, which are mostly unregulated in the U.S.
During their analysis of inks, Swierk and his team discovered the presence of ingredients that were not listed on the label. In one case, etha