Ethan Clarke
Microplastics are in our bodies—but what does this mean for our health? Scientists have been studying the impact of plastic on the environment for decades, but only recently have they discovered the extent to which microplastics have become embedded in the environment and in human bodies. They can be found in our blood, saliva, liver, kidneys, brains, placentas, testes, and other organs. They can be inhaled, ingested, or absorbed by the body. They have been linked to a series of health conditions, including cancer, severe immune reactions, and reproductive disorders. The scientific community has even gone as far as calling microplastics the number one threat to humankind.
| Characteristics | Values |
|---|---|
| Microplastics enter the human body through | Food, drinking water, indoor air, cosmetics, personal care products, breast milk, blood, semen, etc. |
| Microplastics are found in the human body | Lungs, blood, saliva, liver, kidneys, placenta, brain, testicles, etc. |
| Health risks | Allergic reactions, cell death, inflammation, lung and liver issues, changes in the gut microbiome, altered lipid and <co: 10,13,20>hormone metabolism, cancer, severe immune reactions, reproductive disorders, etc. |
| Reducing microplastics exposure | Using less plastic, including filters in washing machines to catch microplastics from clothing, etc. |
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What You'll Learn
Microplastics in food and water
Microplastics are small plastic particles that come from the degradation of plastics. They are found in the environment, in the air we breathe, the food we eat, and the water we drink. While the health risks of microplastics are not yet fully understood, their presence in our bodies is a growing concern.
Microplastics have been detected in various food products, including seafood, meat, dairy, and plant-based alternatives. A study by Ocean Conservancy and the University of Toronto found microplastic particles in 88% of protein food samples tested, with no statistical difference between land and ocean-sourced proteins. This suggests that food processing may not be the only source of microplastic contamination, and that plastic pollution is pervasive in our food systems.
Contamination with microplastics has also been found in drinking water, with plastic particles small enough to be inhaled or ingested. Studies have shown that once absorbed, microplastics can distribute to various organs in the body, including the liver, spleen, heart, lungs, thymus, reproductive organs, kidneys, and even the brain. While the health effects of microplastics on humans are not yet fully understood, laboratory tests have shown that they can cause damage to human cells, including allergic reactions and cell death.
The presence of microplastics in our food and water is a concern due to their potential impact on human health and the environment. Regulatory bodies and researchers are working to understand the extent of the problem and to develop solutions to reduce microplastic exposure, such as using less plastic in products and packaging and implementing filters to catch microplastics.
While the full extent of the risks posed by microplastics in our food and water is not yet known, the growing body of research highlights the importance of addressing plastic pollution and reducing our reliance on plastics to protect human health and the environment.
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Microplastics in the air
Firstly, microplastics in the air are not an isolated issue. Humans are exposed to multiple pollutants and hazardous chemicals daily, including microplastics ingested through food, water, and other sources. This means that the health effects of airborne microplastics must be understood in the context of combined exposure to various toxins. Regulatory bodies and manufacturers play a crucial role in reducing microplastics exposure by implementing measures such as filters in washing machines and reducing plastic usage in products.
Secondly, the presence of microplastics in the air is influenced by various sources and factors. They can originate from the breakdown of larger plastic products, consumer goods, domestic items, and construction materials, and face masks. Natural factors, such as ocean waters, agricultural dust, and road traffic, also contribute to the spread of microplastics in the air. These particles can travel long distances and have been found in remote areas, emphasizing the widespread nature of the issue.
The health implications of airborne microplastics are a significant area of concern. While limited epidemiological studies are available, laboratory tests have shown that microplastics can cause adverse effects on human cells, including allergic reactions and cell death. In addition, the presence of microplastics in the lungs has been confirmed, suggesting inhalation as a route for their entry into the body. The immune system's response to microplastics is another area of investigation, with the potential for triggering inflammatory reactions or aggravating existing inflammatory diseases.
Furthermore, the impact of microplastics on the ecosystem cannot be overlooked. Studies have indicated that microplastics can decrease photosynthesis and microalgal growth, release harmful plastic additives, and induce the growth and transport of pathogenic bacteria. The bioaccumulation of microplastics through the food chain further highlights the complexity of their presence in the environment and their potential impact on human health. Overall, the presence of microplastics in the air is a pressing issue that requires systemic efforts to address plastic production, usage, and disposal to mitigate potential health risks.
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Microplastics in personal care products
Microplastics are small plastic particles, usually microscopic, that can be found in cosmetic and personal care products. These include products like sunscreen, shampoo, deodorant, makeup, and toothpaste. They are intentionally added to improve the feel and finish of cosmetics and the cleansing and
The presence of microplastics in these products has raised concerns about their potential impact on human health and the environment. While the health risks are not yet fully understood, studies have shown that microplastics can enter the human body through inhalation or ingestion. They have been found in human lung tissue, blood, feces, and even in the placentas of unborn babies.
Laboratory tests on mice have indicated that the presence of microplastics can trigger an immune response, leading to inflammation and potentially aggravating existing inflammatory diseases. There are also concerns about the chemicals found in plastics, such as bisphenol A (BPA) and phthalates, which can disrupt the body's natural endocrine system.
Some companies, like L'Oréal, have taken steps to reduce or eliminate microplastics from their products. Regulatory bodies and manufacturers are also working to address this issue and reduce microplastic exposure. However, there is still a need for further research and discussion to determine the best course of action.
To minimize exposure to microplastics, individuals can check product ingredients and avoid those containing known microplastic components. Efforts such as the “Beat the Microbead” campaign provide resources to identify and avoid products containing microplastics.
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Health risks of microplastics
Plastic is ubiquitous in the environment and, as a result, in our bodies. The health risks of microplastics are an emerging field of study, and the evidence is still inconclusive. However, there are several areas of concern that researchers are investigating.
One key area of concern is the potential for microplastics to cause inflammation. Studies have shown that the presence of microplastics can trigger an immune response, which could lead to a strong inflammatory reaction and potentially aggravate existing inflammatory diseases of the lungs or gastrointestinal tract. In addition, microplastics have been linked to cell death in laboratory tests, and there is evidence that they can cause oxidative stress, DNA damage, organ dysfunction, metabolic disorders, neurotoxicity, and reproductive and developmental toxicity.
Another area of concern is the potential for microplastics to act as a vector for harmful bacteria and viruses. Studies have suggested that microplastics in the ocean can provide a safe haven for germs, and there is a risk that microplastics coated with pathogens could spread infections when inhaled or ingested. Furthermore, microplastics may carry antibiotic-resistant bacteria, which could have serious implications for human health.
The impact of microplastics on the endocrine system is also a cause for concern. Endocrine-disrupting chemicals found in many plastics, such as bisphenol A (BPA), phthalates, and per- and polyfluoroalkyl substances (PFAS), can interfere with the body's natural hormone production and have been linked to reproductive issues.
The extent of the risk posed by microplastics is challenging to determine due to the wide variety of microplastics and the difficulty of estimating their accumulation in human tissues. In addition, the lack of epidemiological studies on large groups of people limits the conclusions that can be drawn. However, the growing body of evidence suggests that microplastics are a significant health concern that requires further research and regulation.
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Reducing microplastics exposure
It is now common knowledge that microplastics are present in the human body. While the health risks are not yet fully understood, it is likely that the presence of microplastics in the body can have adverse effects. Therefore, it is important to take steps to reduce exposure to microplastics.
One of the main sources of microplastics exposure is through the food and drinks we consume. Single-use plastics, such as plastic bottles, food containers, and takeout containers, can introduce microplastics and chemicals to foods and beverages. To reduce exposure, it is recommended to switch from plastic to glass or ceramic food and beverage containers. Reusing single-use plastics for food storage or reheating is discouraged, as it can increase the risk of microplastic exposure.
Bottled water, in particular, has been found to contain microplastics, with research indicating that it may be a significant source. Switching to tap water can help reduce exposure, although it is important to note that tap water may also contain microplastics. Installing water filters, such as under-sink filters or pitcher filters, can help reduce the presence of microplastics in drinking water.
Another source of microplastics exposure is through the air we breathe. Microplastics can be present in the air as airborne dust particles, which can be inhaled and penetrate deep inside the body. To reduce exposure to airborne microplastics, it is recommended to regularly vacuum with a bagged, sealed-system vacuum that has a HEPA or S-class filter. Mopping and wiping down surfaces with a damp cloth can also help reduce the presence of dust particles containing microplastics.
Additionally, microplastics can be introduced to the body through personal care products, such as cosmetics, face scrubs, toothpastes, and shower gels. These products may contain microplastics that are washed off and enter the sewage system, eventually making their way back into the environment and our water sources. To reduce exposure, it is recommended to opt for personal care products that do not contain microplastics or to reduce the use of such products.
While it is challenging to completely avoid microplastics, taking these steps can help reduce exposure and potential health risks. It is important to stay informed and support initiatives that advocate for the reduction of microplastics in the environment and stricter regulations on the use of plastics.
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Frequently asked questions
Microplastics are tiny plastic particles that are less than five millimeters or 0.2 inches in diameter. They are either intentionally produced or result from the breakdown of larger plastic items in nature.
Microplastics can enter the human body through ingestion, inhalation, or even by applying cosmetics. They have been found in food, drinking water, and indoor air.
The potential health risks of microplastics in the human body are still being studied. However, they have been linked to severe immune reactions, reproductive disorders, and cancer. They can also carry toxic chemicals and bacteria that can have harmful effects on the body.
To reduce your exposure to microplastics, you can avoid using single-use plastics, choose cosmetics and personal care products that do not contain microplastics, and support initiatives that promote sustainable practices and reduce plastic pollution.
Some common sources of microplastics include trash, dust, fabrics, cosmetics, cleaning products, seafood, produce, and table salt. They can also be released into the environment through the production and destruction of plastics, contributing to climate change.
