Why do tattoos last forever?
Secret to permanent tattoos lies in greedy immune cells
Guess how tattoos stay there forever, even as your skin cells die and are replaced?
French researchers say they have found the answer, and it’s a little bit surprising. They found that immune system cells called macrophages eat the ink, and then pass it to their replacements when they die. More
Baranska A. et al., J Exp Med., 2018
