Microplastics are no longer just an environmental issue. Over the past several years, scientists have found these tiny plastic fragments in our blood, lungs, and even our brains.
Naturally, this has led many people to ask: “How did they get there, and what can I do about it?”
While science is still growing, we now have ways to measure personal exposure. At the same time, the science surrounding microplastics is still developing, which makes careful interpretation essential.
For a professional perspective on the evolving field of microplastics testing, we spoke with David Perez, the Founder and CEO of Lumati, to discuss the scope of plastic pollution in the human body.
Table of Contents
What are Microplastics and Why are They Everywhere?
Microplastics are plastic particles smaller than five millimeters. Some are made this small on purpose for industrial use, but most form when larger plastic items break down over time from heat, sunlight, friction, or wear and tear.
Even tinier particles, called nanoplastics, are much harder to see or measure, but they still contribute to overall exposure. Nanoplastics are increasingly included in research because of their ability to interact with cells and biological systems.
Because plastic is used in almost everything we touch, exposure happens in three main ways:
- Eating and Drinking: From plastic-lined cans, bottled water, and food packaging.
- Breathing: Inhaling tiny fibers from synthetic carpets, clothing, and household dust.
- Daily Contact: Using plastic-based personal care products or cookware.
As these materials age and break down, microplastics are released into the air, water, and food we consume.
Once these particles enter the body, some are likely eliminated naturally. Others may stay long enough to be detected in biological samples.
Researchers have found microplastics in blood, lung tissue, and other areas. What is still being studied is how long they remain and whether they build up over time.
Measuring Microplastics Inside the Body
Advances in laboratory technology have made it possible to detect in the human body.
This kind of testing is still new and isn’t part of routine medical care, but it’s becoming more common in research and specialized exposure studies. It’s important to understand that these tests measure the particles themselves. They don’t tell you what effect, if any, those particles are having on your health.
What a test does tell you:
- If you are currently being exposed to plastics.
- Which types of plastic are entering your system.
- Whether your levels are higher or lower than the population average.
What a test does not tell you:
- If these particles are currently causing a specific issue.
- Exactly how long a particle has been in your body.
Can You Test Your Body for Microplastics?
Researchers and testing specialists have noted that microplastics can be detected in several biological samples, depending on what the testing is designed to measure.
For example, blood and tissue samples are biological samples that can be used for detection. However, now samples can be taken without blood tests, requiring no needles, thanks to saliva.
The Rise of Saliva Testing
Saliva-based testing has become more common because it is easy to collect and does not require needles or clinic visits.
While it does not measure microplastics in every part of the body, it provides useful insight into how everyday environments and habits may be contributing to exposure.
According to Mr. Perez, saliva is increasingly discussed because it can reflect direct exposure through the mouth and respiratory pathways. He explains that saliva does not replace blood or tissue analysis, but it can offer useful insight into ongoing exposure, especially from inhaled particles or food contact.
How At-Home Testing Works
Saliva-based testing offers a non-invasive way to track microplastic exposure without the need for blood draws.
Because saliva reflects particles entering through the mouth and airways, it is particularly effective for monitoring how recent lifestyle changes impact your immediate exposure.
Someone may consider saliva testing if they are worried about exposure due to things like:
- Shifts in diet or food products
- New cookware
- Indoor air quality
How Accurate are At-Home Tests?
The reliability of an at-home test depends on a couple of factors. To get the most accurate results, it is important to follow the collection and packing steps carefully.
By taking your sample carefully and packing it as instructed, you give the lab the best chance to get a clear picture of your actual exposure.
Once the sample arrives, professional laboratories analyze it using advanced equipment and strict contamination controls.
Important Limitations
It is vital to view these tests as a tool for pattern tracking rather than a full medical diagnosis.
Saliva testing measures ongoing exposure but cannot determine your “total body load” or how plastics are stored in deeper tissues.
Detection in the Lab
Microplastics are easily contaminated with plastic from the surrounding environment. Because of this, testing requires specialized laboratory methods.
The process usually involves several steps:
- Collecting a sample using controlled materials
- Removing organic material while preserving plastic particles
- Filtering and separating particles by size
- Identifying plastic types using advanced instruments
Labs can figure out if tiny particles are plastic by looking at their chemical makeup. They use special tools, like FTIR and Raman spectroscopy, to identify exactly what type of plastic a particle is. This lets scientists tell the difference between common plastics, like polyethylene or polypropylene, and understand where they might have come from.
One of the biggest challenges in testing is avoiding contamination. Plastic is present in lab equipment, air, and even clothing. Reliable labs take extra precautions, such as using plastic-free tools when possible and running control samples to check for contamination.
The quality of a test depends heavily on these procedures. Without strict controls, results can be misleading.
How Much is Too Much?
One of the most common misunderstandings about microplastics testing is the idea that there is a clear line between safe and unsafe levels. At this time, science has not established such thresholds.
This means there is no specific number that indicates danger, and no test result can diagnose a health condition. Instead, results should be viewed as part of a larger picture.
“At this stage, microplastics testing should be viewed as a screening and awareness tool rather than a diagnostic test for disease. … For individuals and clinicians focused on prevention, that information can help guide lifestyle and environmental choices.”
-David Perez, Founder and CEO of Lumati
Testing is most helpful when you use it to track your progress over time. Instead of a one-time “pass or fail” score, the results show how close your plastic exposure is to average, and whether your lifestyle changes are actually working.
For example:
● If your numbers are high or growing, it acts as a “red flag” to help you find and remove hidden sources of plastic in your home.
● If your numbers are low, it gives you peace of mind that your current habits are working well.
Even though scientists haven’t set an official “safe” or “unsafe” limit yet, the data isn’t useless; it acts as a personal baseline that helps you take control of your environment.
Even accurate measurements can be misleading if presented without context. Because there are no established clinical thresholds, results should be framed in terms of relative exposure rather than risk or diagnosis.
Common Sources of Microplastics Exposure
Microplastics in the body come from a mix of everyday sources. Most people are exposed through a combination of air, food, water, and household materials.
If someone eats mostly fresh foods but spends a lot of time in a home with poor ventilation and lots of synthetic materials, they might be exposed to more microplastics through the air. On the other hand, someone who eats a lot of packaged or processed foods could get more exposure from what they eat and drink.
Individual habits, living environments, and local conditions all play a role. This is why exposure levels differ widely between people.
One study from 2025 suggests that once we eat, drink, or breathe in these particles, they enter our bloodstream. From there, the blood carries them into the skeletal system. In laboratory tests, they saw this “invasion” happen in as little as four weeks of exposure.
Air
Indoor air is a major source of exposure. Synthetic fabrics, carpets, furniture, and dust release plastic fibers that can be inhaled. Poor ventilation can increase exposure, especially in enclosed spaces.
Outdoor air also contributes, particularly in urban areas where traffic, construction, and industrial activity release plastic particles into the environment.
Food and Water
Food and drinking water are another major pathway. Microplastics have been found in bottled water, tap water, seafood, salt, and many packaged foods.
Food preparation matters as well. Heating food in plastic containers causes plastic to break down more quickly. Plastic utensils and cookware can also release particles when exposed to high heat.
Household Items
Many common items shed plastic over time. This includes cleaning tools, storage containers, sponges, and personal care products. These particles can become airborne or settle into dust.
Because exposure sources overlap, it is rarely possible to identify a single cause. Patterns over time are often more informative than one-time measurements.
How to Reduce Accumulation in the Body
Completely avoiding microplastics is not realistic, but reducing exposure is possible with thoughtful changes.
Food and Cooking
| Swap This (High Exposure) | For That (Lower Exposure) |
| Heating food in plastic containers | Glass, ceramic, or stainless steel |
| Plastic spatulas and utensils | Wood, bamboo, or stainless steel |
| Plastic-wrapped/processed foods | Fresh, minimally packaged foods |
| Worn non-stick cookware | Cast iron or stainless steel |
Drinking Water
| Swap This (High Exposure) | For That (Lower Exposure) |
| Plastic-lined travel mugs | All-metal or ceramic mugs |
| Single-use plastic water bottles | Glass or stainless steel bottles |
| Unfiltered tap water | Water filters (particulate-reducing) |
Indoor Air & Cleaning
| Swap This (High Exposure) | For That (Lower Exposure) |
| Stagnant indoor air | Open windows |
| Standard vacuum cleaners | HEPA-filtered vacuum systems |
| Dry dusting (moves dust around) | Wet dusting (captures dust particles) |
| Indoor airborne pollutants | High-efficiency air purifiers |
Clothing and Textiles
| Swap This (High Exposure) | For That (Lower Exposure) |
| Synthetics (Polyester, Nylon, Acrylic) | Natural fibers (Cotton, Linen, Wool) |
| Frequent, hot laundry cycles | Cooler, less frequent washes |
| Standard laundry drainage | Microfiber filters for washing machines |
Microplastics Testing as a Preventive Tool
Microplastics testing can be a helpful part of a proactive, preventive approach to health. It gives you information about your exposure before any symptoms appear, helping to make informed decisions about your environment and habits.
Testing allows individuals to establish baseline exposure levels, observe changes over time, and evaluate the impact of environmental or lifestyle modifications. It does not diagnose disease or predict outcomes, but it supports informed awareness.
“There has been a growing emphasis on preventative and proactive health, understanding potential risks earlier rather than waiting for symptoms to appear. At Lumati, we describe this as ‘making the invisible visible.’ Many environmental exposures are difficult to assess without specialized tools, yet they may still influence long-term health.”
-David Perez, Founder and CEO of Lumati
Testing doesn’t diagnose disease or predict health outcomes, but it can show whether exposure comes more from the air you breathe or the food you eat. With that insight, simple adjustments, like improving indoor air filtration or reducing plastic food packaging, can help lower exposure.
According to Perez, scaling these tests provides researchers with the anonymized data needed to track global exposure trends, evaluate detox protocols, and shape future environmental policies.
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As with anything you read on the internet, this article should not be construed as medical advice; please talk to your doctor or primary care provider before changing your wellness routine. WHN neither agrees nor disagrees with any of the materials posted. This article is not intended to provide a medical diagnosis, recommendation, treatment, or endorsement. Additionally, it is not intended to malign any religion, ethnic group, club, organization, company, individual, or anyone or anything. These statements have not been evaluated by the Food and Drug Administration.
