Tattoo ink contaminants can end up in lymph nodes

Particles of colour, which can be tainted with toxic impurities, can make their way to key immune system sites, researchers say.

Microscopic particles from tattoo ink can migrate into the body and wind up in lymph nodes, crucial hubs of the human immune system, a new study has revealed.

The tiny particles – measuring a few millionths to a few billionths of a centimetre – include molecules from preservatives and contaminants such as nickel, chromium, manganese and cobalt, researchers reported.

Tattoo colouring is composed of various organic and inorganic pigments and can be contaminated with toxic impurities.

Besides carbon black, the second-most common ingredient used in tattoo inks is titanium dioxide, a white pigment also used in food additives, sunscreens and paints.

The chemical has been associated with delayed healing, itching and skin irritation.

“When someone wants to get a tattoo, they are often very careful in choosing a parlour where they use sterile needles,” said a researcher.

“No one checks the chemical composition of the colours, but our study shows that maybe they should.”

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