A recent study conducted by researchers at the University of Southern and Denmark and Helsinki examined data from over 5,900 twins to understand whether having a tattoo correlates with an increased risk of certain cancers, particularly skin cancer and lymphoma.
Twins are almost genetically identical and share the same early life environment, suggesting that lifestyle factors such as tattoo ink exposure may play a role.

In this article, we will look at the end of the research and the surrounding factors, including:
Important findings: Twin studies

This study had three main findings.
1
Tattooed twins had a higher incidence of cancer compared to their non-tentacle siblings.
2
Larger tattoos (larger than the palm) pose a greater risk and increased the likelihood of developing cancer.
3
Tattoo ink doesn’t stay where you put it. The ink particles gather in the lymph nodes. (This can cause chronic inflammation, as the body always fights ink as “foreign particles” and potentially contribute to the development of cancer.)
How tattoo ink moves in the lymphatic system
Tattoo ink accumulates in the dermis, and some particles are small enough to be absorbed by the lymphatic system (which filters waste and fights infections). Immune cells try to break down ink particles, but many are too large and remain trapped in lymph nodes.
This can cause chronic low-grade inflammation (linked to a variety of diseases, including lymphoma).
Also, some inks contain heavy metals and carcinogens, which can affect immune function when stored in lymph nodes, causing exposure to chemicals.
Additionally, the lymphatic system filters toxins, so ink buildup can affect the body’s process of removing other harmful substances.
Understanding the numbers: relative risks of cancer and absolute risks for individuals with tattoos

It is important for clients and artists alike to understand that tattoo ink can pose risks. However, for those interested in risk, it is also important to understand the difference between relative and absolute risk.
The study shows that people with tattoos with large tattoos (larger than the palm) are “3.91 times more likely to develop skin cancer.” This is a statistically significant cancer risk, but this is also a relative risk.
However, for example, if twins have a common 1% baseline risk of contracting skin cancer, the risk for tattoo twins is 1% x 3.91. So, while twins without tattoos may still have a 1/100 chance of developing cancer, tattoo twins will have around four chances in a 1/100.
Cancer risk and behavioral patterns in tattooed individuals: correlation and causal relationships
There is a correlation between tattoo twins and high risk of cancer, but it takes time for cancer to develop, but at this point it is difficult to clearly imply a causal relationship and point the tattoo ink fingers as the only risk statistic for tattoo twins.
A study of Danish twins allows scientists to compare people with similar genetics and environmental factors. However, it does not take into account lifestyle factors that may diverge among siblings, such as smoking, drinking, and exposure to sunlight.
The original study considers this in a statement. This means that exposure in young people does not lead to illness until decades later, making it difficult to measure the direct effect. “
Are people with tattoos more likely to engage in behaviors that increase the risk of cancer?
Tattoos have become more mainstream in the last decade (the pool of personality types is tattooed), but there is still a perception of people with tattoos that show “dangerous” behaviors than people without tattoos.
This is not completely free from the foundations.
Studies show that young people with tattoos are more likely to engage in activities that can increase their risk of cancer, such as drugs, tobacco and alcohol use.
The expression “deviant behavior… tends to decrease with age” is very likely to be a very likely increase in the likelihood of an individual being stimulated to be involved in behaviors that cause a higher cancer risk, including skin cancer and lymphoma, to participate in research at any point in life.
Tattoo ink and the added benefits of previous research

The twin studies were not the first to analyze the effects of tattoo ink on the body.
One study published in August 2022 found that tattoo inks are considered carcinogenic, especially in certain circumstances. Apart from the effects on the lymphatic system, the main risks associated with tattoo inks are ink particle size and laser removal processes.
Ink particle size
Tattoo ink particles tend to grow larger – too large for the body’s natural defense system to break down effectively. (This is how tattoo ink creates the lasting effects that tattoo ink has. If all the particles are small enough to break down, the tattoo will disappear for the body’s natural defenses.)
However, at the time of writing, tattoo ink production is beginning to be regulated. For this reason, ink particle size is not constantly monitored. If the tattoo ink particles are smaller than normal, they can migrate through the cell’s membrane and damage the cells. (Cells damaged in the right condition can cause cancer.)
Laser Tattoo Removal Process
Much of the tattoo ink is injected into the skin and stays there. However, when ink undergoes laser removal, it appears that the risk of lymphoma increases significantly.
Tattoo ink and carcinogenic heavy metals
Some tattoo inks have been discovered to have cancer-causing substances. Chemicals and certain heavy metals determine the color of the tattoo ink, and they are dangerous. This is why the UK proposed ban on tattoo ink.
Some dangerous ingredients included barium, copper and mercury amines making white, blue/green and red inks, respectively (though most manufacturers switched cadmium mercury to produce red ink).
These substances are produced in very small amounts. Basically, do you have a question like, “Does tattoo ink give you cancer?” You cannot simply point to these compounds to answer.
What’s next for tattoo research: Does tattoo size affect cancer risk?
The study’s leaders emphasized that further research should be conducted to explain tattoo sizes in relation to the amount of ink delivered to the lymph nodes (and whether this increases the risk of cancer in individuals with more ink).
The researchers also plan to investigate how ink particles affect lymph node function at the molecular level and whether certain types of lymphoma are more associated with tattoos than others.