Earlier this year I sat with this headline for a long time before writing about it.
A study published in Nature Medicine by researchers at the University of New Mexico found that human brains contain measurable concentrations of micro and nanoplastics — predominantly polyethylene, in nanoscale shard-like fragments. The 2024 brain samples contained approximately 50% more plastic than the 2016 samples from the same study. The brains of individuals with dementia showed three to five times higher concentrations than those without.
The internet, predictably, spiraled. "Microplastic influencers" appeared overnight. A clinic in the US began offering blood-cleaning procedures for $13,000. People threw out their black kitchen utensils. Detox supplement brands popped up faster than the research could validate them.
I understand the panic. But panic is not a protocol.
What I want to do in this article is tell you what the research actually says — including where it's strong, where it's preliminary, and where the wellness industry is already getting ahead of itself — and then give you the most evidence-grounded, practical steps for reducing your exposure and supporting your body's natural clearance mechanisms. No $13,000 blood cleanses. No overclaiming.
This is a real issue. It deserves a real response.
What the Research Actually Found
The Nature Medicine study (Nihart et al., 2025) used pyrolysis gas chromatography–mass spectrometry — a sophisticated analytical technique — to detect micro and nanoplastics in human kidney, liver, and brain tissue from cadavers. The findings were striking in several ways:
30×
Higher plastic in brain tissue than kidney or liver in some samples
50%
More plastic in 2024 brain samples vs 2016 — suggesting ongoing bioaccumulation
3–5×
Higher concentrations in brains of individuals with dementia vs controls
#1
Polyethylene — the predominant polymer found, in nanoscale shard-like fragments
That last finding — the dementia correlation — is the one that stops people cold. And it should prompt serious attention, with the appropriate caveats.
The study's authors themselves note that no causal relationship has been established. The dementia finding is a correlation. Scientists reviewing the study have emphasized that no strong direct evidence of health effects has yet been demonstrated at the observed levels. The German Federal Institute for Risk Assessment noted methodological limitations in sample preparation and detection. Multiple researchers called for independent replication with larger sample sizes.
The honest position: Microplastics are in our brains, they are accumulating faster over time, and the possibility that chronic exposure contributes to neuroinflammation and neurodegenerative disease is biologically plausible and worth taking seriously. What we cannot say: that these concentrations are definitively causing harm at observed levels, or that any currently available intervention reverses accumulation in the brain.
Where Microplastics Come From
Understanding the sources helps you prioritize where to reduce exposure. The entry points are more numerous than most people realize.
Drinking water
Both tap water and bottled water contain microplastics — and bottled water is not necessarily cleaner. Studies have found that bottled water can contain higher concentrations than tap, partly due to plastic leaching from the bottle itself, particularly under heat or UV exposure.
Food packaging and preparation
Heating food in plastic containers dramatically accelerates leaching. Plastic cutting boards shed microplastics during chopping. Plastic tea bags release millions of microplastic particles into your cup when steeped in hot water.
Ultra-processed foods
Consistently show higher microplastic contamination than whole foods — both from processing equipment and from packaging.
Air inhalation
A 2019 study estimated humans may inhale between 74,000 and 121,000 microplastic particles annually. Indoor air typically has higher concentrations than outdoor air due to synthetic textiles, carpeting, and dust accumulation.
Sea salt and shellfish
Shellfish like mussels and oysters, consumed whole including the digestive system, carry particularly high microplastic loads. Sea salt tested across multiple studies shows consistent contamination.
Personal care products
Including some toothpastes, exfoliants, and oral care products — identified as direct sources of microplastic ingestion through mouth contact.
What Microplastics Do in the Body
The mechanisms by which microplastics may cause harm operate through several pathways, each with varying levels of research support.
Oxidative stress
StrongThe most consistently documented mechanism. Microplastic particles trigger reactive oxygen species production, damaging cells, mitochondria, and DNA — the same pathway implicated in cardiovascular disease, cancer, and neurodegeneration.
Chronic inflammation
StrongParticles that lodge in tissue activate inflammatory responses — chronic, low-grade inflammation that underlies most modern chronic disease.
Endocrine disruption
StrongPhthalates and BPA — chemical additives in plastics — are well-established endocrine disruptors affecting hormone regulation, reproductive health, thyroid function, and metabolic processes.
Cardiovascular accumulation
StrongA landmark study in the New England Journal of Medicine found microplastics in carotid artery plaque samples were associated with significantly increased risk of cardiovascular events including stroke and heart attack — one of the most concerning outcome findings in the field.
Gut microbiome disruption
EmergingMicroplastic exposure has been shown to affect microbial diversity, gut barrier integrity, and inflammatory balance — connecting to immune function, mood regulation via the gut-brain axis, and metabolic health.
Neurological effects
PreliminaryThe dementia correlation from the Nature Medicine study, combined with animal research showing more severe neurological effects from microplastic exposure in older animals, makes this the highest-priority area for ongoing research. It does not yet constitute proof.
What the Wellness Industry Is Getting Wrong
I need to say this clearly before giving you the protocol, because the microplastics panic is already spawning exactly the kind of exploitative wellness marketing that gives this industry a bad name.
❌ $13,000 blood-cleaning (apheresis) procedures
No published evidence of efficacy for microplastic removal in healthy individuals.
❌ "Microplastic testing panels" from clinics
There is currently no validated method to directly measure retained plastic levels in living humans in a clinically meaningful way. These tests don't have established clinical validity.
❌ Supplements that "remove microplastics from the brain"
No supplement has demonstrated the ability to cross the blood-brain barrier and selectively extract plastic particles. Anyone selling that is selling fear, not science.
What we do have evidence for is more modest and more useful: reducing ongoing exposure, supporting the body's natural detoxification and elimination systems, and reducing the downstream effects of plastic exposure — oxidative stress, inflammation, and gut disruption — through well-evidenced interventions.
The Evidence-Based Microplastics Protocol
Step 1: Reduce Exposure at the Source
This is where the highest-leverage interventions are. Every unit of plastic that doesn't enter your body doesn't need to be cleared.
Filter your water with reverse osmosis
RO filtration is the gold standard — it removes the widest range of contaminants including microplastics, fluoride, heavy metals, and chemical additives that standard filters leave behind. The single most evidence-supported intervention in this guide.
Shop Waterdrop Reverse Osmosis FilterStop heating food in plastic
Transfer food to glass or ceramic before microwaving. Never pour boiling water into plastic containers. Replace plastic food storage with glass.
Switch to loose-leaf tea
Plastic tea bags release millions of microplastic particles per cup when steeped in hot water. Loose-leaf tea in a metal or ceramic infuser eliminates this entirely.
Reduce ultra-processed food consumption
The more food is processed and the more it contacts plastic in production, the higher its microplastic load. Whole foods from glass or paper packaging carry dramatically less plastic.
Replace plastic cutting boards with wood or glass
Plastic boards shed microplastics into food during chopping — a source most people don't think about.
Use a HEPA vacuum regularly
Indoor dust is a significant microplastic source. HEPA filtration captures particles that standard vacuums recirculate into the air.
Don't leave plastic bottles in heat or sun
UV exposure and heat dramatically accelerate plastic leaching from bottle materials.
Step 2: Support Your Body's Natural Elimination Pathways
Your liver, gut, kidneys, lungs, and skin are your primary detoxification systems. Supporting them with evidence-based interventions is how you help the body process and eliminate what plastic exposure brings in.
Sweat regularly
Research shows that sweating can facilitate elimination of BPA and phthalates — plastic-associated chemical compounds — at higher concentrations than achieved through urine alone. While sweat cannot physically expel plastic particles, the endocrine-disrupting chemicals associated with them can be mobilized through thermal stress. Sauna (infrared or traditional) and vigorous exercise are the primary tools here.
Support gut integrity
The gut microbiome plays a central role in how the body handles plastic exposure. Microplastics disrupt microbial diversity and gut barrier function. Spore-based probiotics — which actually survive digestion and colonize the colon — combined with diverse prebiotic fiber are the evidence-based foundation here.
Shop Just Thrive Probiotics — Use discount code THRIVETOOLSPrioritize liver support
The liver is the body's primary detoxification organ. Cruciferous vegetables (broccoli, Brussels sprouts, cauliflower) activate Nrf2 — the master cellular defense pathway that regulates detoxification enzymes. Sulfur-containing foods (garlic, onions, eggs) support glutathione production — your body's primary endogenous antioxidant and detoxifier.
Step 3: Counteract the Downstream Effects
Even with reduced exposure and strong elimination support, some ongoing microplastic exposure is unavoidable in the modern world. This layer targets the biological mechanisms through which microplastic exposure causes harm — primarily oxidative stress and inflammation.
Chlorella
Preliminary human dataChlorella vulgaris has been shown in research to bind to microplastics through exopolysaccharides, with PET plastic removal rates documented in laboratory settings. The evidence for direct microplastic binding in humans is preliminary — most of the binding data comes from aquatic environment research — but the mechanism is plausible and the safety profile is excellent. Cracked-cell chlorella taken on an empty stomach is the standard approach.
Shop ENERGYbits — Use discount code THRIVETOOLS-10NAC (N-Acetylcysteine)
Strong evidence for oxidative stressNAC is a precursor to glutathione — your body's master antioxidant that plays a central role in cellular detoxification. It directly addresses the oxidative stress mechanism through which microplastics cause cellular damage. NAC is well-studied, widely available, and has a strong safety profile.
Reishi mushroom
Strong evidence for inflammationIts well-documented anti-inflammatory and liver-protective properties make it directly relevant to the two primary mechanisms of microplastic toxicity. The triterpenoids in Reishi support liver detoxification pathways and modulate the inflammatory response.
Shop Hyperion Herbs Reishi — Use discount code EDEN10High-EPA omega-3s
Strong evidence for inflammationEPA specifically drives prostaglandin metabolism and cytokine regulation — directly counteracting the chronic inflammatory response associated with microplastic exposure. AquaOmega's vegan algae softgels provide high-DHA plant-based omega-3 in triglyceride form — the most bioavailable format.
Shop AquaOmega Vegan Omega-3Magnesium
Strong evidence for oxidative stressOxidative stress depletes magnesium, and magnesium deficiency amplifies susceptibility to oxidative damage. BiOptimizers Magnesium Breakthrough uses 7 bioavailable forms to cover the full spectrum of magnesium functions — including its role as a cofactor in glutathione synthesis and antioxidant enzyme activity.
Shop BiOptimizers Magnesium Breakthrough — Use discount code THRIVETOOLSAntioxidant-rich whole foods
Strong evidenceBerries, cruciferous vegetables, turmeric with black pepper, green tea, and dark leafy greens all contribute to the antioxidant capacity that buffers against microplastic-driven oxidative damage. This is foundational — supplements sit on top of this, not in place of it.
The Honest Caveats
Here is what the evidence does and doesn't support for everything above.
Water filtration with reverse osmosis
StrongestDemonstrably removes microplastics from drinking water. The single most evidence-supported intervention in this guide.
Avoiding heating food in plastic
StrongStrong evidence for reducing leaching of plastic-associated chemicals into food. The connection to microplastic particle ingestion specifically is more indirect but the overall reduction in plastic exposure is well-supported.
Sweating for chemical elimination
ModerateSpecifically for BPA and phthalates. The physical particle elimination route through sweat is not established.
Chlorella microplastic binding
PreliminaryHas laboratory evidence and a plausible mechanism but limited direct human trial data specifically for microplastic reduction. Included because the mechanism is real and the safety profile allows it.
NAC, Reishi, omega-3s, and magnesium
Strong (indirect)Have strong evidence for addressing oxidative stress and inflammation — the downstream mechanisms of microplastic harm — but not for microplastic removal specifically. They belong in this protocol for what they do, not for claims they can't yet make.
Nothing in this article, or currently available to consumers, has demonstrated the ability to remove microplastics from brain tissue. If you see that claim anywhere, walk away.
Where This Is Going
The science is moving fast. Microplastics as a measured health marker — tracked alongside cholesterol or inflammatory markers — is becoming a real possibility as detection methods mature. The Global Wellness Institute has identified microplastic exposure as a defining health challenge of our time, and institutional investment in understanding the full health picture is accelerating.
What we know now is enough to act on — not with panic, but with the kind of steady, informed attention that actually moves the needle.
The protocol is not complicated. Filter your water, reduce your plastic contact with food, sweat regularly, eat a diverse antioxidant-rich diet, support your gut and liver, and use targeted supplementation to buffer the oxidative and inflammatory effects of unavoidable exposure.
That's not nothing. That's a lot, actually, if you do it consistently.
Frequently Asked Questions
Are microplastics in everyone's brain?
Based on the Nature Medicine study, microplastics appear to be present in human brain tissue broadly across the population studied — not limited to specific demographics. Plastic concentration was not significantly influenced by age, sex, race, or ethnicity, though concentrations were higher in more recent (2024) samples than older (2016) ones, suggesting ongoing accumulation.
Do microplastics cause dementia?
No causal relationship has been established. The Nature Medicine study found higher microplastic concentrations in the brains of individuals with dementia compared to controls — a correlation that warrants serious research attention but does not prove causation. Scientists have explicitly cautioned against interpreting this as a cause-and-effect relationship based on current evidence.
Does bottled water contain microplastics?
Yes. Multiple studies have found microplastics in bottled water, sometimes at higher concentrations than tap water. Plastic leaching from the bottle material itself, particularly under heat or UV exposure, is a contributing factor. Reverse osmosis filtered tap water in a glass or stainless steel container is the cleaner alternative.
Can you detox microplastics from your brain?
Not with any currently available consumer intervention. No supplement or therapy has demonstrated the ability to cross the blood-brain barrier and selectively remove plastic particles. Be skeptical of any product making this claim. The most evidence-based approach is reducing ongoing exposure and supporting the body's natural processing of plastic-associated toxins.
Does sweating help remove microplastics?
Sweating has evidence for facilitating elimination of plastic-associated chemicals like BPA and phthalates — at higher concentrations than urine in some studies. It does not physically expel plastic particles. Regular sauna use or vigorous exercise supports chemical detoxification through sweat but is not the same as microplastic removal.
Is reverse osmosis the best water filter for microplastics?
Reverse osmosis is consistently rated as the most effective filtration method for microplastics, removing the widest range of particle sizes alongside other contaminants including fluoride and heavy metals. It is the filter type I use and recommend.
What foods have the most microplastics?
Ultra-processed foods, shellfish (particularly those consumed whole like mussels and oysters), sea salt, beer, and foods heated or stored in plastic containers tend to have higher microplastic concentrations. Whole foods in glass or paper packaging carry significantly lower loads.
Research References
Nihart AJ, et al. "Bioaccumulation of microplastics in decedent human brains." Nature Medicine, 2025. ↗
Marfella R, et al. "Microplastics and nanoplastics in atheromas and cardiovascular events." New England Journal of Medicine, 2024. ↗
"Microplastics and Nanoplastics in Health: Cellular Toxicity Mechanisms, Exposure Pathways, and Global Mitigation Strategies." PMC, 2025. ↗
"New scientific articles highlight potential link between microplastics in ultra-processed foods and brain health." EurekAlert / Brain Medicine, May 2025. ↗
"The 2026 Levels Guide to Microplastics and Metabolic Health." Levels Health, 2026. ↗
Eden Laraki is the founder of ThriveTools.co — a science-backed wellness and biohacking platform covering supplements, tonic herbs, breathwork, plant medicine, and cognitive optimization, built from 14 years of personal research and self-experimentation.
→ Explore ThriveTools.coThis article is for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider regarding your personal health situation.