Tattoo Ink Moves Through the Body, Killing Immune Cells and Weakening Vaccine Response
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There are far too many humans with tattoos that could have been researched extensively, but they chose mice. Mice do not have the same kind of skin density as humans, and I doubt a tattoo artist or researcher would have the talent to tattoo a mouse’s skin.
There’s just so many things wrong with using mice in this study. So many bad ratios with the size of the animal. I mean, for fuck’s sake, tattoo artists already practice on pig skin. Pigs would have been a better analogue, but honestly, they should have picked the millions of humans who were already tattooing themselves.
Of course, if they did that, they wouldn’t get the same result and be able to push this sensationalist science news title, now would they? Except, in this case, we’ve gone from research paper to straight to sensationalist news title in one step! Just let the institute PR department push the narrative for you, without having to wait for that pesky news cycle to crawl through the telephone game.
You’re freaking out over over a single study. This is the beginning of a more comprehensive investigation. Chill your cornhole

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And yet, we manage to have hundreds of thousands of studies written about humans with human subjects. This sounds like a boatload of excuses that could be summed up as “science is hard”. Sure, it’s hard, but it’s better than putting out a flawed study that can’t scale properly.
Sure, the study would be best if we did a randomised double blind study on a sample of 100 people that all are going to get a tattoo anyway but that doesn’t make the mouse study irrelevant.
Mice and humans, although very different in appearance have biomechanics that are very similar. For every human study you could make a 20 mouse studies with the same funding so you could do a lot more exploration.
This study found something, notably that ink in the blood affected the immune system. This just means that future studies are needed like injecting people with tattoo ink and blood samples diagnosis after tattoo to see how much ink is in the blood. If confirmed this will push tattoo ink manufacturers to develop a new ink that eliminates the effect and we can all enjoy safer more effective tattooing.
This study is not flawed, it’s pushing human knowledge forward like it always does.
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Like with cigarettes in the past people weren’t informed about the consequences before making their choices.
Yeah, but the tobacco cartels had performed studies which clearly demonstrated how absolutely horrible their shit was and not only not made them public, but used them to maximise addiction (and cancer, as a side effect they didn’t give a single shit about).
I very much doubt the tattoo industry has ever studied anything.
Oh definitely, the tobacco industry is way worse. Tattoo artists (at least in my county) have to follow hygiene regulations and aren’t allowed to tattoo minors, and there don’t seem to be any issues with this. There isn’t any incentive for them to cause harm to their customers, on the contrary, so I don’t blame them for this. If tattooing poses serious health risks like this study suggests, it would suck for everyone involved.
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It’s good that you’ve expressed misconception as the source of this opinion, and admitted to your lack of understanding. The rest of the work could fall in nicely, if you put the effort forth. I’ll give ya one for free: “the culture around it” isn’t some singular entity, but a varied and colorful amalgam of countless inspirations, backgrounds, beliefs, reasons, etc., and the only thing that oversimplifying does here is stunt your personal growth.
You got this.


Thanks, I’m good.
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And yet things like asbestos, lead, and smoking all took way longer than you’d expect (given they were a lot more universal).
All three of your examples were known to cause ill effects for centuries. The ancient Romans knew the asbestos mines were killing their slaves. Their overuse during the 20th century was not due to ignorance but corporate lobbying and political complacency.
The lobbyist play is to fund counter-studies to sow FUD even though the scientific consensus that [X Bad] is well established, because it gives an easy out for bought out politicians. However the tatoo lobby is certainly not one that I expect to be have the pull to fund FUD scientific studies to delay legislation, and if they are doing that it should be pretty easy to point to.
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It’s just tiresome to hear these hyperventilating articles without any real measure of the degree of risk or long term consequences.
Honestly, I think that shitty science reporting like this is fuel for the normie to science skeptic pipeline.
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Ah pretty interesting. Good to clarify that its in mice, not humans.
Similarly, human immune cells previously exposed to ink also showed a weakened response to vaccination.
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The researchers discovered that once a tattoo is made, the ink rapidly travels through the lymphatic system and, within hours, accumulates in large quantities in the lymph nodes — key organs of the body’s defense system. Inside these nodes, immune cells called macrophages actively capture all types of pigment. This ink uptake triggers an inflammatory response with two phases: an acute phase lasting about two days after tattooing, followed by a chronic phase that can persist for years. The chronic phase is particularly concerning because it weakens the immune system, potentially increasing the susceptibility to infections and cancer. The study also showed that macrophages cannot break down the ink like they would other pathogens, wich causes them to die, especially with red and black inks, suggesting these colors may be more toxic. As a result, ink remains trapped in the lymph nodes in a continuous cycle of capture and cell death, gradually affecting the immune system’s defensive capacity.
The study found that tattooed mice produced significantly lower levels of antibodies after vaccination. This effect is likely due to the impaired function of immune cells that remain associated with tattoo ink for long periods. Similarly, human immune cells previously exposed to ink also showed a weakened response to vaccination.
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The researchers discovered that once a tattoo is made, the ink rapidly travels through the lymphatic system and, within hours, accumulates in large quantities in the lymph nodes — key organs of the body’s defense system. Inside these nodes, immune cells called macrophages actively capture all types of pigment. This ink uptake triggers an inflammatory response with two phases: an acute phase lasting about two days after tattooing, followed by a chronic phase that can persist for years. The chronic phase is particularly concerning because it weakens the immune system, potentially increasing the susceptibility to infections and cancer. The study also showed that macrophages cannot break down the ink like they would other pathogens, wich causes them to die, especially with red and black inks, suggesting these colors may be more toxic. As a result, ink remains trapped in the lymph nodes in a continuous cycle of capture and cell death, gradually affecting the immune system’s defensive capacity.
The study found that tattooed mice produced significantly lower levels of antibodies after vaccination. This effect is likely due to the impaired function of immune cells that remain associated with tattoo ink for long periods. Similarly, human immune cells previously exposed to ink also showed a weakened response to vaccination.
how low? weakened by how much?
I think they leave that out on purpose so they can make these sensational claims… if your immune system takes a 0.02% hit, nobody would care
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The researchers discovered that once a tattoo is made, the ink rapidly travels through the lymphatic system and, within hours, accumulates in large quantities in the lymph nodes — key organs of the body’s defense system. Inside these nodes, immune cells called macrophages actively capture all types of pigment. This ink uptake triggers an inflammatory response with two phases: an acute phase lasting about two days after tattooing, followed by a chronic phase that can persist for years. The chronic phase is particularly concerning because it weakens the immune system, potentially increasing the susceptibility to infections and cancer. The study also showed that macrophages cannot break down the ink like they would other pathogens, wich causes them to die, especially with red and black inks, suggesting these colors may be more toxic. As a result, ink remains trapped in the lymph nodes in a continuous cycle of capture and cell death, gradually affecting the immune system’s defensive capacity.
The study found that tattooed mice produced significantly lower levels of antibodies after vaccination. This effect is likely due to the impaired function of immune cells that remain associated with tattoo ink for long periods. Similarly, human immune cells previously exposed to ink also showed a weakened response to vaccination.
Ha, get bent.
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And yet, we manage to have hundreds of thousands of studies written about humans with human subjects. This sounds like a boatload of excuses that could be summed up as “science is hard”. Sure, it’s hard, but it’s better than putting out a flawed study that can’t scale properly.
You don’t need to sum it up as science is hard but also as science is expensive. They might simply not have gotten funding for something as that.
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The researchers discovered that once a tattoo is made, the ink rapidly travels through the lymphatic system and, within hours, accumulates in large quantities in the lymph nodes — key organs of the body’s defense system. Inside these nodes, immune cells called macrophages actively capture all types of pigment. This ink uptake triggers an inflammatory response with two phases: an acute phase lasting about two days after tattooing, followed by a chronic phase that can persist for years. The chronic phase is particularly concerning because it weakens the immune system, potentially increasing the susceptibility to infections and cancer. The study also showed that macrophages cannot break down the ink like they would other pathogens, wich causes them to die, especially with red and black inks, suggesting these colors may be more toxic. As a result, ink remains trapped in the lymph nodes in a continuous cycle of capture and cell death, gradually affecting the immune system’s defensive capacity.
The study found that tattooed mice produced significantly lower levels of antibodies after vaccination. This effect is likely due to the impaired function of immune cells that remain associated with tattoo ink for long periods. Similarly, human immune cells previously exposed to ink also showed a weakened response to vaccination.

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The researchers discovered that once a tattoo is made, the ink rapidly travels through the lymphatic system and, within hours, accumulates in large quantities in the lymph nodes — key organs of the body’s defense system. Inside these nodes, immune cells called macrophages actively capture all types of pigment. This ink uptake triggers an inflammatory response with two phases: an acute phase lasting about two days after tattooing, followed by a chronic phase that can persist for years. The chronic phase is particularly concerning because it weakens the immune system, potentially increasing the susceptibility to infections and cancer. The study also showed that macrophages cannot break down the ink like they would other pathogens, wich causes them to die, especially with red and black inks, suggesting these colors may be more toxic. As a result, ink remains trapped in the lymph nodes in a continuous cycle of capture and cell death, gradually affecting the immune system’s defensive capacity.
The study found that tattooed mice produced significantly lower levels of antibodies after vaccination. This effect is likely due to the impaired function of immune cells that remain associated with tattoo ink for long periods. Similarly, human immune cells previously exposed to ink also showed a weakened response to vaccination.
Steve-O is still alive; humanity will be fine.
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Why not be a professional scientist by:
- adding “in mice” to the title;
- using modern statistical methods instead of continuously discredited procedures like p-values?
- adding “in mice” to the title;
Similarly, human immune cells previously exposed to ink also showed a weakened response to vaccination.
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how low? weakened by how much?
I think they leave that out on purpose so they can make these sensational claims… if your immune system takes a 0.02% hit, nobody would care
You’d care if it’s a 20% hit, though.
But you’re completely right, without any details, the claims are rather empty at best
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The researchers discovered that once a tattoo is made, the ink rapidly travels through the lymphatic system and, within hours, accumulates in large quantities in the lymph nodes — key organs of the body’s defense system. Inside these nodes, immune cells called macrophages actively capture all types of pigment. This ink uptake triggers an inflammatory response with two phases: an acute phase lasting about two days after tattooing, followed by a chronic phase that can persist for years. The chronic phase is particularly concerning because it weakens the immune system, potentially increasing the susceptibility to infections and cancer. The study also showed that macrophages cannot break down the ink like they would other pathogens, wich causes them to die, especially with red and black inks, suggesting these colors may be more toxic. As a result, ink remains trapped in the lymph nodes in a continuous cycle of capture and cell death, gradually affecting the immune system’s defensive capacity.
The study found that tattooed mice produced significantly lower levels of antibodies after vaccination. This effect is likely due to the impaired function of immune cells that remain associated with tattoo ink for long periods. Similarly, human immune cells previously exposed to ink also showed a weakened response to vaccination.
Surely someone could check this by doing a statistical analysis of cancer patients with tattoos vs how many of the general population has tattoos?
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Why make this comment encouraging bad behavior? This feels like injected negativity for negativity sake. Idk man, be the change you want to see in your community.
Because I am a sarcastic fuck.
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The researchers discovered that once a tattoo is made, the ink rapidly travels through the lymphatic system and, within hours, accumulates in large quantities in the lymph nodes — key organs of the body’s defense system. Inside these nodes, immune cells called macrophages actively capture all types of pigment. This ink uptake triggers an inflammatory response with two phases: an acute phase lasting about two days after tattooing, followed by a chronic phase that can persist for years. The chronic phase is particularly concerning because it weakens the immune system, potentially increasing the susceptibility to infections and cancer. The study also showed that macrophages cannot break down the ink like they would other pathogens, wich causes them to die, especially with red and black inks, suggesting these colors may be more toxic. As a result, ink remains trapped in the lymph nodes in a continuous cycle of capture and cell death, gradually affecting the immune system’s defensive capacity.
The study found that tattooed mice produced significantly lower levels of antibodies after vaccination. This effect is likely due to the impaired function of immune cells that remain associated with tattoo ink for long periods. Similarly, human immune cells previously exposed to ink also showed a weakened response to vaccination.
The full paper is here and, as usual, it’s hardly anything and decontextualized in order to get a publishable result.
This one is so bad that it doesn’t use established baselines or do any form of statistical analysis on the results instead opting for their own “baseline” measurements using very small sample sizes. It also plays a smoke and mirrors game where it shows a result for short term immunological response and then uses that to insinuate the ‘slightly reduced but still likely well within the error of the poor control’ long term effects are worth noting.
Other major flaws:
- As others have mentioned, mice are a terrible model for this as their skin is very thin and proper tattooing is near impossible.
- They mention verifying with human cadavers but don’t include any data from those.
- There was no control group, the baseline was an untreated mouse, not one with an acute foot trauma.
- Mice age very quickly, best I can tell the immunological markers weren’t age controlled. 2 months out of a <2 year lifespan is a lot of aging. Again, if there was a proper control to measure against.
- The obsfucation of the raw data into cheesy and unreadable box and whisker plots is hella suspicious.
At best it’s a very poorly communicated and poorly designed experiment but I suspect that’s due to it result hunting.
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Human subjects are crazy to work with for a few reasons
- People don’t follow instructions perfectly
- Research subjects often don’t take the research project very seriously.
- It’s not uncommon to have dropouts, thus you either have to find more subjects or have less data.
- It’s impossible to know what the subjects are doing to cause data variability (diet, vices, etc)
- You can’t lock subjects in a room and force them to eat and drink the same food every day.
- There’s a financial (time) penalty to many research studies that can get in the way of enthusiastic participation.
Laboratory mice literally live 5 to a cage with almost no diet variability, in a controlled environment. Yes shit does happen with research mice, but it’s something that is easy to control overall.

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You’d care if it’s a 20% hit, though.
But you’re completely right, without any details, the claims are rather empty at best
Absolutely! and having tattoos I care extra… the devil is always in the details
In the society we live in, I’d guess the difference is minuscule so they hide the details to justify the headline
Anecdotally, I live in Canada and tons of people have tattoos; health benchmarks are pretty decent here even if politicians have been trying really hard to dismatle our healthcare system… I feel we would have seen/suspected this before if it were significant (I work in healthcare)
