The researchers tested 75 tattoo inks from 14 manufacturers for the presence of aerobic and anaerobic bacteria. The study authors say they are the first to investigate anaerobic bacteria — known to thrive in low-oxygen environments — in commercial tattoo inks.
The researchers tested 75 tattoo inks from 14 manufacturers for the presence of aerobic and anaerobic bacteria. Microgen – stock.adobe.com
“Both types of bacteria, those needing oxygen (aerobic) and those not needing oxygen (anaerobic), can contaminate the inks,” said corresponding study author Seong-Jae (Peter) Kim, a microbiologist for the US Food and Drug Administration in Arkansas.
The FDA considers the inks used in tattoos — including permanent makeup — to be cosmetics, which do not need premarket approval like a drug or medical device does.
“FDA has not approved any inks for injection into your skin,” its website states .
The pigments used in the inks are color additives, which are subject to FDA approval, but the agency admits it has not historically regulated them. State and local jurisdictions, meanwhile, oversee tattooing practices.
The FDA considers the inks used in tattoos — including permanent makeup — to be cosmetics, which do not need premarket approval like a drug or medical device does. mikeosphoto – stock.adobe.com see also Possible link between tattoos and lymphoma revealed in new study
The FDA notes that it has fielded reports of people getting infected from contaminated tattoo inks over the years and even issued a safety alert in 2019 after identifying six tattoo inks contaminated with bacteria.
Infections can lead to rashes or lesions, and in some cases, permanent scarring.
Last year, the agency issued draft guidance to help tattoo ink manufacturers and distributors recognize potential contamination from bacteria, mold or other microorganisms.
Kim said his research showed “no clear link between a product label claiming sterility and the actual absence of bacterial contamination.”
A Pew Research Center survey last year found that 32% of US adults have a tattoo, including 22% who have more than one. LIGHTFIELD STUDIOS – stock.adobe.com
Kim pointed out that bacterial infections are just one negative outcome of tattoos. Inflammatory reactions, allergic hypersensitivity and toxic responses are potential complications as well.
Kim said his research team plans to develop more efficient contamination detection methods for tattoo inks.
“In light of our study results, we want to emphasize the importance of continuously monitoring these products to ensure the microbial safety of tattoo inks,” he said.
The study results follow research that found 83% of tattoo inks contain substances not on their label, like different pigments or unlisted additives. A separate study highlighted a potential link between tattoos and lymphoma, a type of blood cancer.
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