Omar Khalid
Plastic is a material that can now be found everywhere, even in the most remote places on Earth. It is estimated that over 8.3 billion tons of plastic have been produced, with 3/4 of it currently constituting waste. Plastic waste is a well-known issue, but the health harms of this avalanche of fossil fuel-based material are less understood. Plastic products contain chemicals such as bisphenol A (BPA), phthalates, vinyl chloride, dioxins, and per- and polyfluoroalkyl substances (PFAS), which have been linked to endocrine disruption, DNA damage, and increased cancer risk. These chemicals can leach from plastic, especially when heated or damaged, and enter the human body through ingestion or inhalation. While studies have suggested that certain chemicals found in plastics have cancer-causing effects, the evidence is not yet conclusive for human cancer risk.
| Characteristics | Values |
|---|---|
| Chemicals in plastics linked to cancer | Bisphenol A (BPA), phthalates, vinyl chloride, dioxins, per- and polyfluoroalkyl substances (PFAS), benzene, toluene, ethylbenzene, xylene, ethylene dichloride |
| Plastics that may contain these chemicals | Polyethylene terephthalate, polyethylene, polymers styrene, poly (methyl methacrylate), PVC, BPA-free plastics |
| Health risks | Endocrine disruption, DNA damage, hormone imbalance, reproductive issues, developmental disorders, increased cancer risk (breast, ovarian, liver, lung, prostate, pancreatic, testicular) |
| Exposure routes | Inhalation, ingestion, dermal contact, food and beverage consumption |
| Mitigation | Use certified food-safe products, hand wash plastics, discard scratched or damaged containers, support policies and innovations to reduce plastic pollution |
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What You'll Learn
- Chemicals in plastic, such as bisphenol A (BPA), phthalates, and vinyl chloride, are linked to cancer
- These chemicals can act as endocrine disruptors, causing hormone imbalance and increasing cancer risk
- Plastic additives and non-intentionally added substances (NIAS) can leach into food and drinks
- Microplastics enter the human body through ingestion or inhalation and accumulate in organs
- There is no reliable evidence that food and drinks stored in plastic containers cause cancer
Chemicals in plastic, such as bisphenol A (BPA), phthalates, and vinyl chloride, are linked to cancer
Bisphenol A (BPA) is a chemical used in the production of polycarbonate plastics and epoxy resins. It is commonly found in products such as shatterproof windows, water bottles, and food storage containers. While BPA exposure is widespread, with a 2003-2004 study detecting it in 93% of urine samples from individuals aged six and older, there is no conclusive evidence that it causes cancer in humans. Animal studies and lab experiments on cells have suggested potential cancer-causing effects, but these studies may not accurately reflect human exposure in daily life.
Phthalates, pronounced THAL-ates, are a group of chemicals used primarily to soften and improve the flexibility of plastics. They are also found in a wide range of products, including personal care items, cosmetics, building materials, and food packaging. Phthalates are endocrine disruptors, which means they can interfere with hormonal systems such as estrogen and androgen. Several studies have linked specific phthalates to an increased risk of breast cancer, especially in premenopausal women. However, it is important to note that these studies may not reflect the typical exposure levels experienced by the general population.
Vinyl chloride is a colorless gas that is produced industrially and used primarily to make polyvinyl chloride (PVC), a hard plastic resin. Vinyl chloride is not considered a carcinogen on its own, but its presence in contaminated water supplies can lead to exposure through inhalation during activities like showering, cooking, or doing laundry. According to the National Cancer Institute, exposure to vinyl chloride has been associated with an increased risk of rare forms of liver, brain, and lung cancers, as well as lymphoma and leukemia.
While the evidence for the direct link between these chemicals and cancer in humans varies, it is important to note that some studies have found potential health risks associated with exposure to these chemicals. Regulatory agencies, such as the Food Standards Agency in the UK, are responsible for ensuring the safety of materials like plastic that are used for storing food and drink.
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These chemicals can act as endocrine disruptors, causing hormone imbalance and increasing cancer risk
While there is no reliable evidence that plastic containers and bottles increase the risk of cancer, some studies have suggested that certain chemicals found in plastics may have cancer-causing effects. These chemicals, such as bisphenol A (BPA), phthalates, vinyl chloride, dioxins, and per- and polyfluoroalkyl substances (PFAS), are known as endocrine disruptors. Endocrine disruptors are substances that can interfere with the body's hormones, leading to a range of health issues.
BPA, for example, is a chemical used in hard plastics and can linings that can mimic estrogen, potentially disrupting hormone function. In addition to being linked to hormone imbalance, endocrine disruptors have been associated with reproductive issues, developmental disorders, and an increased risk of certain cancers, including breast, ovarian, liver, lung, and prostate cancers.
Research has shown that these chemicals can migrate from plastic containers into food or drink, especially when the plastic is heated or damaged. However, it is important to note that the current evidence suggests that the migration of chemicals from plastic containers under normal use is generally at low levels and is not likely to cause cancer.
Furthermore, the production and transportation of plastic also contribute to toxic exposures. The manufacturing of polyvinyl chloride (PVC) involves the use of highly toxic chemicals, such as chlorine gas, ethylene dichloride, and vinyl chloride, which have been linked to an increased risk of breast cancer. Transporting plastic, such as by truck or train, releases diesel fumes and poses the risk of spills and accidents, as seen in the Norfolk Southern train derailment in East Palestine, Ohio, where toxic vinyl chloride was released into the environment.
While the direct link between plastic use and cancer risk remains uncertain, the presence of endocrine-disrupting chemicals in plastics highlights the importance of reducing plastic consumption and exposure, particularly when heating or damaging plastic products, to minimize potential health risks.
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Plastic additives and non-intentionally added substances (NIAS) can leach into food and drinks
The detection and identification of NIAS are challenging due to the complexity of FCMs and FCAs, but advances in analytical techniques have made it easier. High-sensitivity analytical techniques are commonly used to detect NIAS, but identifying the chemical structure of unknown compounds remains difficult. Non-targeted screening methods can detect additional NIAS, but many substances remain unidentified. Thermal desorption techniques are used to investigate FCMs and food simulants, but interpretation is challenging due to complex fragmentation patterns. Gas or liquid chromatography, coupled with mass spectrometry or other detectors, aids in substance identification.
The safety of FCMs, including NIAS, is a topic of discussion among industry, scientists, and regulators. EU legislation allows only authorized substances listed in specific measures, with exemptions for colorants, polymer production aids, solvents, and oligomers. The challenge lies in managing NIAS in the event of material degradation or contamination. Risk assessment tools like the threshold of toxicological concern (TTC) concept and bioassays with sensitive analytical techniques are used to evaluate NIAS hazards.
While studies have suggested potential cancer-causing effects of some chemicals found in plastics, these experiments are often conducted on animals or in lab settings with unrealistic chemical concentrations. There is no reliable evidence that food and drinks stored in plastic cause cancer. Regulatory agencies, such as the Food Standards Agency in the UK, ensure the safety of plastic materials used for storing food and drink. Any chemical migration from plastic containers is considered safe for human consumption and is not linked to cancer risk.
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Microplastics enter the human body through ingestion or inhalation and accumulate in organs
While there is no reliable evidence that plastic containers and bottles increase the risk of cancer, microplastics, which are plastic particles smaller than 5mm, have been found to enter the human body through ingestion or inhalation and accumulate in various organs.
Microplastics are prevalent in the environment, including in oceans, remote islands, polar regions, and the air. They can be intentionally created, such as in consumer-care products like detergents and cosmetics, or they can be secondary products of plastic waste that has decomposed. These microplastics can enter our bodies through the food we eat, the water we drink, and the air we breathe.
Studies have found microplastics in seafood, drinking water (both tap and bottled), and agricultural products. They can also be inhaled, with potential negative effects on the lungs similar to those caused by other particulate matter. Microplastics have been detected in human lung tissue, suggesting that inhalation is one route for them to enter the body.
Once ingested or inhaled, microplastics can accumulate in various organs, including the lungs, gastrointestinal tract, small intestine, large intestine, tonsils, blood, saliva, liver, kidneys, and placenta. The highest abundance of microplastics has been detected in lung tissue, followed by the small intestine, large intestine, and tonsils. The accumulation of microplastics in the body can vary depending on factors such as diet, location, and individual characteristics.
While the health risks of microplastics are not yet fully understood, there is growing concern among researchers. Microplastics have been shown to affect various systems in the body, including the digestive, respiratory, endocrine, reproductive, and immune systems. They can cause physical irritation and inflammation in the gastrointestinal tract, leading to symptoms such as abdominal pain, bloating, and changes in bowel habits. Additionally, microplastics can contribute to chemical toxicity by facilitating the absorption and accumulation of environmental toxins such as heavy metals and polycyclic aromatic hydrocarbons.
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There is no reliable evidence that food and drinks stored in plastic containers cause cancer
It is important to note that there is no reliable evidence that food and drinks stored in plastic containers cause cancer. While some studies have suggested that certain chemicals found in plastics have cancer-causing effects, these experiments are often conducted on animals or in lab settings that may not accurately represent human exposure.
For instance, plastics may contain chemicals such as bisphenol A (BPA), phthalates, vinyl chloride, dioxins, and per- and polyfluoroalkyl substances (PFAS). These substances have been linked to endocrine disruption, DNA damage, and increased oxidative stress, which are factors that can contribute to cancer development. However, the migration of these chemicals from plastic containers into food or drink is typically at low levels that are not considered harmful.
Additionally, the production and disposal of plastics can generate toxic exposures for workers, communities, and the environment. Oil and gas operations associated with plastic production release toxic air contaminants, and accidents, such as the train derailment in East Palestine, Ohio, can result in the release and burning of harmful chemicals like vinyl chloride, leading to soil contamination and potential health risks.
While it is advisable to remain informed about plastic-related health and environmental issues, the current consensus is that consuming food and drinks stored in plastic containers does not increase the risk of cancer. To reduce potential risks, it is recommended to regularly inspect containers, avoid using scratched or damaged plastic products, and opt for safer alternatives like glass or stainless steel when possible.
In summary, while plastics may contain chemicals with potential cancer-causing effects, the evidence does not support a direct link between cancer and consuming food or drinks stored in plastic containers. However, ongoing research and a critical evaluation of plastic use are crucial to fostering a healthier future.
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Frequently asked questions
Food and drinks stored in plastic containers and bottles do not increase the risk of cancer. However, some chemicals can get into food from plastics when they are heated, including when microwaved. Nevertheless, there is no evidence to suggest that this causes cancer.
Chemicals such as bisphenol A (BPA), phthalates, vinyl chloride, dioxins, and per- and polyfluoroalkyl substances (PFAS) have been linked to cancer development. These chemicals are endocrine disruptors and can cause DNA damage and promote oxidative stress.
Microplastics and nanoplastics can enter the human body through ingestion or inhalation and accumulate in organs. They induce oxidative stress, inflammation, and cellular apoptosis, which may lead to carcinogenesis. Research has shown correlations between exposure to microplastics and cancers such as hepatocellular carcinoma and pancreatic cancer.
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