How to Remove Plastic From the Body: A Scientific Look

No proven clinical method exists to flush microplastics from human tissues once they have settled there. Your body does eliminate a large share of the plastic particles you swallow, mostly by passing them through the gut and out in feces, and to a lesser extent through urine. But a fraction of what you ingest or inhale crosses into the bloodstream and reaches organs, and the science of getting those particles back out is still in its earliest stages. Researchers are exploring everything from blood-filtering procedures to probiotics, though none of these are ready for routine use.

How Plastic Gets In and Where It Accumulates

You take in microplastics and nanoplastics three ways: by eating and drinking them, by breathing them in, and through skin contact. Of these, ingestion is the dominant route. Food packaging, bottled water, seafood, and even produce all carry tiny plastic fragments. The air in your home and workplace contains airborne particles shed from synthetic textiles, foam insulation, and countless other sources; various polymer types have been detected in human lung tissue samples.

1PubMed Central. Inhalation of Microplastics-A Toxicological Complexity

Skin is generally an effective barrier against larger particles, but nanoparticles in the sub-micrometer range can penetrate it, especially when the skin is damaged or when products are applied repeatedly to the same area.

2PubMed Central. Penetration of Microplastics and Nanoparticles Through Skin: Effects of Size, Shape, and Surface Chemistry

Once particles cross the gut lining or lung membranes and enter the blood, they can travel widely. Microplastics have been confirmed in human kidney, liver, and brain tissue using multiple detection methods.

3Nature Medicine. Bioaccumulation of microplastics in decedent human brains They have also been found in the placenta, meaning they can cross from a pregnant person to the fetus.

4Environment International. Plasticenta: First evidence of microplastics in human placenta The brain appears to be a particular accumulation site: autopsy samples showed brain tissue had higher concentrations than liver or kidney, and those concentrations rose significantly between 2016 and 2024. Polyethylene, the plastic used in bags and bottles, was the most common polymer found.

5PubMed Central. Bioaccumulation of Microplastics in Decedent Human Brains Assessed by Pyrolysis Gas Chromatography-Mass Spectrometry

How readily particles cross the gut lining depends on their material and size. In laboratory models using human intestinal cells, polyethylene particles in the 1–4 micrometer range crossed the gut barrier to a greater extent than polystyrene particles of the same size, suggesting that the type of plastic matters as much as the particle size.

6Toxicology in Vitro. Uptake and cellular effects of PE, PP, PET and PVC microplastic particles

What Your Digestive System Does to Plastic

The short answer is: almost nothing. When researchers exposed common food-grade plastics to simulated stomach acid, bile, and intestinal enzymes, the particles came through largely intact. Their sizes and shapes did not meaningfully change.

7Food and Chemical Toxicology. Impact of artificial digestion on the sizes and shapes of microplastic particles Your gut is built to break down proteins, fats, and carbohydrates. Synthetic polymers are chemically different enough that digestive juices do not decompose them, though they do interact with them in other ways. Simulated digestion experiments show that microplastics can adsorb digestive enzymes onto their surfaces, potentially interfering with normal digestion, and that certain additives like phthalates leach out during the process, particularly in the acidic conditions of the stomach.

8Food Chemistry. Microplastics in simulated digestion: Surface modifications, enzyme interference, and chemical migration

There is one intriguing exception. Researchers mining the human gut microbiome’s genetic data identified a novel enzyme, produced by intestinal bacteria, that can break down PET (the plastic in drink bottles and food containers) at the nanoscale.

9International Journal of Biological Macromolecules. Identification of a PET hydrolytic enzyme from the human gut microbiome unveils potential plastic biodegradation in human digestive tract Whether this activity happens at a meaningful rate inside a living human gut, or whether breaking plastic down this way is even beneficial, remains unknown. In fact, one cautionary study found that when a gut bacterium broke down a biodegradable plastic called poly(ε-caprolactone), the degradation products actually made metabolic disruption worse rather than better.

10Journal of Hazardous Materials. Gut microbiota-mediated poly(ε-caprolactone) microplastic degradation exacerbates metabolic dysregulation Degrading a plastic particle does not guarantee safety if the breakdown products are toxic.

Natural Clearance Through Feces and Urine

Most of the microplastics you swallow never cross the gut wall at all. They pass through your digestive tract and leave in your stool. In mouse experiments, the majority of ingested fluorescent plastic particles were recovered in feces within days.

11Scientific Reports. Ingesting chitosan can promote excretion of microplastics Stool is widely regarded as the body’s primary exit route for ingested microplastics.

For particles that do enter the bloodstream, urine offers a secondary pathway, but it has limits. In animal experiments using fluorescent polystyrene particles, both blood and urine showed detectable particles after exposure. However, the signal in urine was particularly weak, and only particles smaller than about 3 micrometers appeared there, suggesting the kidneys filter out only the smallest fraction.

12Science of The Total Environment. Blood uptake and urine excretion of nano- and micro-plastics after a single exposure Plastic particles have been detected in human kidney tissue and urine across multiple studies, confirming that this pathway operates in people.

13Environmental Pollution. Pathophysiological impact of nano- and microplastics on the kidney and their potential role in blood pressure regulation

The liver also plays a role through biliary excretion, sending some particles into bile and back into the intestinal tract for elimination in feces. Modeling work that simulated lifetime accumulation estimated that if biliary clearance is active, microplastic levels in tissues could reach a steady state within about 40 days, meaning the body would clear particles as fast as new ones arrive. But if biliary excretion is sluggish or absent for certain particle sizes, accumulation would continue over a lifetime.

14PubMed Central. Lifetime Accumulation of Microplastic in Children and Adults The honest answer is that no one yet knows the actual biliary clearance rate for microplastics in humans. How quickly particles leave tissues depends on their size, and those kinetics have not been characterized for people.

15PubMed. Microplastics and Nanoplastics in Humans: A Critical ADME Appraisal and the Case for Quantitative Risk Assessment

What Happens Inside Your Cells

When plastic particles reach tissues, the immune system’s first responders are macrophages, cells that engulf foreign material. Macrophages readily swallow microplastics, but they cannot break them down. The particles end up trapped in lysosomes, the cellular compartments that normally digest waste. Because the plastic resists degradation, it just sits there. As long as the macrophage stays alive, the particles persist inside it. Over time, this lysosomal overload can cause enzyme leakage and trigger inflammatory responses.

16PubMed Central. Mitigating microplastic-induced organ Damage: Mechanistic insights from the microplastic-macrophage axes

Cells do have one adaptive trick. When nanoplastics accumulate inside cells, research shows the cells can activate a pathway that essentially redirects the particles to the cell surface and expels them packaged inside tiny vesicles called exosomes. This process depends on a protein called TFEB that coordinates lysosomal activity. When researchers boosted TFEB signaling in cell experiments, the cells shed more of their nanoplastic burden. When they blocked it, particles built up faster.

17Journal of Hazardous Materials Advances. TFEB coordinates adaptive lysosome-to-secretory trafficking for exosome-enriched small extracellular vesicle-mediated reduction of intracellular polystyrene nanoplastic burden This is encouraging, but it is cell-culture work, and no one knows how much this mechanism contributes to whole-body clearance in a living person.

Cells also deploy autophagy, a self-cleaning process that quarantines and digests damaged components. Nanoplastics can trigger autophagy as an early response, but chronic exposure seems to overwhelm the system, leading to autophagic dysfunction and reduced cell survival.

18PubMed Central. Biological Modulation of Autophagy by Nanoplastics: A Current Overview

Dietary Strategies Being Studied

If you cannot break plastic down inside the body, the next best idea is to bind it in the gut before it crosses the intestinal wall, speeding it toward the exit. Several dietary approaches are being explored along these lines, mostly in animal experiments.

Chitosan, a fiber derived from crustacean shells, showed striking results in mice. Animals given chitosan alongside microplastics excreted a far larger share of the particles in their feces within the first 24 hours compared to controls. By the end of the experiment, the chitosan group had cleared essentially all of the ingested plastic, while the control group still retained a measurable fraction in its gut.

11Scientific Reports. Ingesting chitosan can promote excretion of microplastics

Insoluble dietary fiber from wheat bran has shown a similar binding effect. In simulated intestinal fluid, wheat bran fiber adsorbed microplastics of various sizes, and in mice it reduced the amount of plastic remaining in the intestines and lowered markers of gut inflammation.

19Food Chemistry. Physicochemical mechanisms of microplastics adsorption by wheat bran insoluble dietary fiber in simulated intestinal fluid A review paper exploring this concept more broadly noted that dietary fibers could serve as a strategy to reduce microplastic health impacts, but emphasized that much more work is needed.

20Food Frontiers. Fighting microplastics: The role of dietary fibers in protecting health

Probiotics are another area of active research. Certain strains of Lactobacillus bacteria have a high capacity to physically adsorb microplastic particles onto their surfaces. In mice, two probiotic strains increased the excretion rate of fluorescent polystyrene from about 41% in controls to roughly 55–56%.

21Frontiers in Microbiology. Novel probiotics adsorbing and excreting microplastics in vivo show potential gut health benefits A separate study isolated a specific Lactobacillus strain from a person whose gut naturally excreted plastic at a high rate. When given to mice on a mixed-plastic diet designed to mimic human exposure, this strain cut the amount of polystyrene remaining in the gut by about 91%, and it reduced other common plastics by roughly half to two-thirds.

22npj Science of Food. Lactiplantibacillus plantarum PD01 from high excretion donor functions as a natural defense against microplastic toxicity

All of these findings are from animal or laboratory models. No human clinical trial has yet tested whether eating more fiber, taking chitosan supplements, or swallowing a probiotic capsule meaningfully reduces your microplastic body burden. But the underlying logic is sound: if you can trap particles in the gut before they cross into the bloodstream, you prevent accumulation rather than trying to remove what has already lodged in tissue.

Blood Filtration and Medical Procedures

For particles already circulating in the blood, one group of researchers asked whether therapeutic apheresis, a medical procedure that filters blood components, could physically pull microplastics out. The idea is straightforward: if you run someone’s blood through a machine that separates out plasma (the liquid fraction), the microplastics suspended in that plasma get discarded with it. In a study of over 170 plasma exchange procedures in 114 patients, circulating microplastics were measurably reduced after treatment.

23PubMed. Can Plasma Exchange Be Used to Lower the Circulating Burden of Microplastics in Human Patients?

There was a catch, though. At low starting levels of microplastics, the reduction was obscured because the plastic tubing used in the apheresis machine itself leached particles back into the blood. The researchers acknowledged this irony but called it the first demonstration that reducing circulating microplastics in humans is possible. A separate commentary described apheresis as a promising method that could be adapted for this purpose.

24PubMed Central. Therapeutic apheresis: A promising method to remove microplastics?

Apheresis is not something you would undergo casually. It is used for serious medical conditions like autoimmune crises and severe high cholesterol, and it requires a clinical setting with specialized equipment. The idea of using it for microplastic removal is more proof-of-concept than practical recommendation at this point.

Sweating Out Plastic-Associated Chemicals

Microplastics themselves are not the only concern. These particles carry chemical additives like bisphenol A (BPA) and phthalates, which leach into your body and act as endocrine disruptors. Here, the picture is slightly more encouraging: your body does clear these chemicals, and sweating appears to play a larger role than often assumed.

A study measuring BPA in blood, urine, and sweat from the same individuals found that sweat generally contained higher concentrations of BPA than urine. In four participants, BPA was detectable in sweat but not in urine at all, suggesting that sweat captures chemicals that urine misses.

25PubMed Central. Human Excretion of Bisphenol A: Blood, Urine, and Sweat (BUS) Study A similar pattern held for phthalates: on average, the concentration of MEHP (a common phthalate metabolite) was more than twice as high in sweat as in urine. In several participants, the parent phthalate compound appeared in sweat but not in blood serum, hinting at possible storage in tissues that sweating can access.

26PubMed Central. Human elimination of phthalate compounds: blood, urine, and sweat (BUS) study

These studies measured plastic-associated chemicals, not microplastic particles themselves. There is no evidence that you can sweat out actual plastic fragments. But given that many health concerns linked to microplastics are really about the chemicals they carry, regular activities that induce sweating (exercise, sauna use) could contribute to reducing your chemical burden from plastics exposure.

Reducing Cellular Damage While the Science Catches Up

A parallel line of research focuses not on removing plastic particles but on limiting the harm they cause while inside you. Much of the damage microplastics inflict comes through oxidative stress, where the particles trigger an overproduction of harmful reactive molecules that damage cell membranes, DNA, and mitochondria. Antioxidants can counteract this process.

In laboratory and animal studies, compounds like vitamin C, curcumin (from turmeric), and quercetin (found in onions, apples, and berries) have reduced oxidative stress markers and inflammation caused by microplastic exposure.

27PubMed Central. Antioxidant Intervention Against Microplastic Hazards Curcumin and vitamin C were specifically linked to improved mitochondrial integrity in cells exposed to microplastics.

28PubMed Central. Microplastics and Oxidative Stress—Current Problems and Prospects These are protective measures, not removal strategies. The plastic stays, but the fallout from its presence may be blunted.

Whether antioxidant supplements would do this effectively in people, at what dose, and for how long remains unanswered. A diet already rich in fruits, vegetables, and spices provides these compounds naturally, and there is no specific “anti-microplastic” supplement regimen backed by human data.

Why the Brain Is a Particular Concern

Among all the organs studied, the brain stands out. Autopsy data comparing samples from 2016 and 2024 showed that microplastic concentrations in brain tissue rose markedly over that period, with all organs showing increases but the brain accumulating the most.

5PubMed Central. Bioaccumulation of Microplastics in Decedent Human Brains Assessed by Pyrolysis Gas Chromatography-Mass Spectrometry Polyethylene dominated the findings, and the proportion of polyethylene was even higher in the brain than in other tissues. Evidence also points to microplastics permeating from the gut to affect both the immune and nervous systems.

29PubMed Central. Mind over Microplastics: Exploring Microplastic-Induced Gut Disruption and Gut-Brain-Axis Consequences

The brain is protected by the blood-brain barrier, which is notoriously selective about what it lets through. The fact that nanoplastics are crossing it and accumulating suggests they are small enough or chemically active enough to exploit the same transport pathways the barrier uses for nutrients. Once inside brain tissue, there is currently no known mechanism, natural or medical, to clear them. The macrophage-based immune response that operates elsewhere in the body is limited in the brain, where resident immune cells called microglia serve a similar but more constrained function. This makes preventing particles from reaching the brain in the first place far more important than any after-the-fact removal strategy.

Practical Steps You Can Take Now

Given that no human-tested removal method exists, reducing intake is the most effective action available. Some straightforward changes make a measurable difference in how many particles you ingest:

  • Avoid heating food in plastic: microwaving in plastic containers or pouring boiling water into plastic bottles dramatically increases the number of particles released into food and drinks.
  • Use tap water over bottled: bottled water consistently contains more microplastic particles than filtered tap water. If you drink bottled water regularly, switching is one of the simplest reductions you can make.
  • Eat more whole foods: heavily processed and packaged foods expose you to more plastic from contact with packaging during manufacturing, storage, and transport.
  • Improve indoor air quality: synthetic textiles, carpet fibers, and dust carry airborne microplastics. Ventilating your living space and using HEPA filtration reduces what you breathe in.
  • Choose natural-fiber clothing when possible: polyester, nylon, and acrylic garments shed microfibers with every wash cycle, contributing to airborne and waterborne plastic that eventually reaches you.

Eating a fiber-rich diet may do double duty. Beyond the general health benefits of dietary fiber, the emerging animal research on wheat bran, chitosan, and similar materials suggests that insoluble fibers could bind microplastics in the gut and carry them out before they cross into the body. This is speculative for humans, but eating plenty of whole grains, legumes, and vegetables is unlikely to cause harm and may have this additional benefit. Fermented foods containing Lactobacillus strains are similarly worth including, given the probiotic findings, though specific “microplastic-clearing” probiotic products do not yet exist.

Regular exercise and sauna use, while not proven to expel plastic particles themselves, may help your body eliminate the chemical additives carried by those particles. The sweat data on BPA and phthalates suggests this is a real, if partial, benefit. And the antioxidant-rich foods already recommended for cardiovascular health and cancer prevention happen to be the same ones that, in laboratory studies, reduce the oxidative damage microplastics cause at the cellular level.