By Svetlana Kogan, M.D.
Tattoos have long been a form of self-expression, storytelling, and artistry. From intricate sleeves to tiny symbols, body art has become a cultural norm—especially among younger generations. But as tattoos grow in popularity, researchers are beginning to ask important questions about their long-term effects. A new study out of Denmark suggests there might be more to consider when it comes to tattoo ink—particularly its possible connection to certain types of cancer.
The Danish Twin Tattoo Cohort study, recently published in BMC Public Health, explored whether exposure to tattoo ink is linked to higher risks of skin cancers and lymphoma. Using an innovative design that included both a general cohort and twin-pair comparisons (where one twin had cancer and the other didn’t), the researchers found concerning results. For individuals with large tattoos—especially those covering more skin than the size of a palm—the risk of skin cancer and lymphoma increased significantly.
Why is this study such a big deal? For starters, it’s one of the first of its kind to combine robust epidemiological data with a unique twin-study design, which helps control for shared genetics and lifestyle factors. The researchers found:
• Tattooed individuals had a 1.6 to nearly 4 times higher risk of skin cancer and basal cell carcinoma.
• Large tattoos—especially those bigger than a palm—were linked to higher cancer risks than smaller ones.
• The risk was especially notable in individuals who had received their tattoos years before their diagnosis, indicating a potential long-term effect of ink exposure.
While the study doesn’t claim tattoos cause cancer, it raises serious questions about chronic inflammation, ink composition, and the body’s long-term response to foreign substances.
What’s in Tattoo Ink?
Tattoo ink is more than colored liquid. Black ink, the most common, often contains carbon black, a substance classified as “possibly carcinogenic” by the International Agency for Research on Cancer.
Colored inks may include heavy metals and azo compounds, some of which can break down into carcinogenic amines when exposed to sunlight or laser removal.
The body doesn’t just leave the ink in place. Studies have shown that ink particles can travel through the lymphatic system and even reach internal organs like the liver. The Danish study builds on that evidence, suggesting these migrating particles may play a role in cancer development by triggering chronic immune responses.
What Can We Learn—and Do?
Let’s be clear: This study isn’t here to shame anyone with tattoos or spark panic. Instead, it’s a reminder that even the most culturally accepted practices can come with hidden risks. Here’s how we can take this research and apply it in practical, thoughtful ways:
1. Ask Before You Ink
Before getting a tattoo, ask your artist about the inks they use. Do they meet current safety standards? Are they free of known carcinogens or heavy metals? Reputable tattoo studios should have this information readily available. It’s your body—don’t hesitate to ask questions.
2. Size (and Location) Matters
The study found that larger tattoos, and possibly those located on sun-exposed areas, were more strongly associated with cancer risk. If you’re planning body art, consider keeping designs smaller and avoiding frequent exposure to direct sunlight—or make sunscreen a permanent part of your tattoo care routine.
3. Rethink Removal
Ironically, removing tattoos may present its own risks. Laser removal breaks ink into smaller particles that can migrate more easily through the body. If you’re considering tattoo removal, consult with a dermatologist about safer approaches, and weigh the risks and benefits carefully.
4. Monitor Your Skin
If you already have tattoos, the takeaway isn’t to panic—but to be proactive. Regularly check tattooed areas for any changes, like unusual bumps, discoloration, or new growths. Tattoos can mask early warning signs, so it’s important to be extra vigilant. If anything seems off, get it checked by a healthcare provider.
5. Push for Better Regulation
Tattoo inks are surprisingly under-regulated in many countries. Public health experts are calling for stricter oversight, clearer ingredient labeling, and long-term safety testing. Supporting these efforts—by raising awareness or contacting your local health authorities—can lead to safer practices for everyone.
The Bigger Picture
This study also reminds us of a broader truth: our choices, however small, can have long-term impacts on our health. Tattoos may be art, but they’re also a chemical commitment. Understanding what goes into our bodies—and how our bodies respond over time—is part of being informed and empowered consumers.
As the researchers concluded, more studies are needed to fully understand how tattoo ink interacts with our biology. But their findings are enough to spark caution—and hopefully, more conversation about how we can enjoy tattoos safely.
Whether you’re inked from head to toe or just considering your first piece, knowledge is power. Ask questions, be informed, and keep your skin—and your whole self—safe.
Svetlana Kogan, M.D.
The author of ‘Diet Slave No More!’, Svetlana Kogan, MD is a Board-Certified Internal Medicine, Holistic & Functional Medical Doctor with 25 years of experience. She has appeared as a health expert on prime-time TV and radio stations
and has authored hundreds of holistic health articles for internet and print. She moved her Concierge Practice from Manhattan NYC to Naples in 2019. Her Functional Medicine Primary Care Practice is focused on prevention and holistic approach to illness, and longevity.
720 Fifth Ave S, Unit 209, Naples , FL 34102
Phone: (239) 676-6883
www.customlongevity.com