The good news is that this effect is transitory. Scientists also pointed out that the immune system is constantly rejuvenating. While some macrophages are attached to the tattoo ink, others will focus on their jobs.
On the other hand, some scientists are studying the potential that tattoos could positively stimulate the immune system. Researchers from the University of Alabama found that people who have extensive tattoos appear to have a higher amount of immune cells, such as antibodies, in their blood. They then concluded that frequent tattooing could act as training for the immune system.
However, since there were no clinical tests comparing how the immune system functions differently between those who have lots of tattoos and those who don’t, the above-mentioned statement is not ironclad.
Based