Kelly Mozman, a chemistry researcher at Binghamton University in New York, and his colleagues analyzed more than 50 tattoo inks from nine different brands used in the United States after noticing that some of the inks they used in previous studies contained substances not listed on the label. Testing inks made by global companies and small producers, the researchers found in their new analysis that 45 of the 54 inks they chemically analyzed contained substances that were not on the label, such as dyes or additives that were not listed. Some ink labels also listed additives that were not present. , 36 glycerols are listed but have only been detected in 29 types of inks. It is not yet known whether these are accidental contaminations of tattoo inks, labeling errors, or intentional but undetected additions, which requires further investigation. “We hope that manufacturers will seize this opportunity to reevaluate their processes, and that artists and customers will seize this opportunity to push for better labeling and manufacturing,” says John Swerk, senior author and a chemist at Binghamton University. Only six inks per manufacturer were considered, but there is reasonable cause for concern that labeling issues could potentially extend to other inks that were not considered in this study. According to the scientific journal Sciencealert, at the end of 2022, the FDA moved The FDA has also decided to regulate tattoo inks as part of expanding its authority to regulate cosmetics.