Rachel Feltman: Nearly a third of U.S. adults have tattoos, so plenty of you listeners can probably rattle off the basic guidelines of tattoo safety: Make sure you go to a reputable tattoo artist who ...

There is an open secret among tattoo artists, dermatologists, and the small group of researchers studying the effects of tattoo ink: Red ink causes the most problems. These problems include ...

In a new study, German researchers were able to track how the liquid components of tattoo ink behave in the body. Scientists in Germany’s Federal Institute for Risk Assessment, or the BfR, were ...