Sofia Martinez
Plastic has infiltrated almost every corner of the Earth, from the Arctic snow to remote deserts and the deepest ocean trenches. It is therefore no surprise that microplastics, a type of plastic smaller than 5mm, are commonly found in our food. While the impact of ingesting plastics on human health is not yet fully understood, there is already some research that suggests it could be harmful. This article will explore the extent to which plastic has infiltrated our food and the potential health implications associated with this issue.
| Characteristics | Values |
|---|---|
| How plastics enter our food | Plastics enter our food through the plastic in the tubing, conveyor belts, and gloves used during food processing, and can even enter directly into meat and produce via contaminated water and soil. |
| Plastic in seafood | Researchers estimate that an average person consumes about 53,864 particles of microplastics annually from seafood, an equivalent to 17 credit cards. |
| Plastic in tea | Tea bags are typically made of plastic, so when they are placed in hot water, plastics melt into the drink. According to one study, tea bags at brewing temperature release about 11.6 billion microplastic and 3.1 billion nanoplastic particles into the water. |
| Plastic in salt | Researchers estimated that an average adult consumes around 2,000 microplastic particles a year from salt. |
| Plastic in fruits and vegetables | Fruits and vegetables can absorb microplastics through their root systems and transfer those chemical bits to the plant’s stems, leaves, seeds, and fruit. Apples were the most contaminated fruit, and carrots had the highest levels of microplastics among the sampled vegetables. |
| Plastic in rice | A University of Queensland study found that for every 100 grams (1/2 cup) of rice people eat, they consume three to four milligrams of plastic — the number jumps to 13 milligrams per serving for instant rice. |
| Plastic in bottled water | One liter of bottled water contained an average of 240,000 plastic particles from seven types of plastics, including nanoplastics. |
| Plastic in tap water | Tap water is also not completely safe, as plastic particles have been found in drinking water around the world. |
| Plastic in baby food | The Food and Drug Administration banned BPA in baby bottles in 2012 (extended in 2013 to infant formula cans). |
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What You'll Learn
Plastic in tea bags
The presence of plastic in tea bags can be attributed to the use of plastic sealants and the fact that some tea bags are made entirely from plastic, such as the commonly used pyramid-shaped tea bags. The plastic in tea bags can break down and release harmful materials when steeped in hot water, which is a concern as tea is typically brewed at temperatures above 40°C. This can result in the release of billions of plastic particles, some of which may be small enough to enter human cells.
The health effects of ingesting microplastics and nanoplastics are still being studied, but research in animals has shown potential impacts on the gut biome, reproductive health, and cognitive function. The World Health Organization has stated that there is no evidence of harm from ingesting plastic particles, as they are excreted without affecting the body's cells or organs. However, the absence of evidence of toxicity does not imply safety, and studies in other species have shown potential early warning signs of environmental and human health risks.
To avoid exposure to plastic in tea bags, consumers can opt for tea brands that offer plastic-free tea bags made from materials like paper, organic cotton, hemp, or plant fibres. Some companies, such as Higher Living, Oi Ocha, and Pukka, offer tea bags that are completely plastic-free and biodegradable. Other companies, like Twinings, Waitrose Duchy, and Barry's Tea, have introduced plant-based biodegradable tea bags, although some of their ranges may still include polypropylene. Consumers can also choose to use loose-leaf tea with a reusable strainer, reducing their exposure to plastic from single-use tea bags.
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Plastic in seafood
Plastic has infiltrated almost every corner of the Earth, from the Arctic snow to remote deserts. Microplastics, a type of plastic smaller than 5mm, are particularly pervasive and insidious. They form through the breakdown of plastic into tiny particles that end up in the ocean, air, and soil.
Microplastics have been found in seafood, bottled water, sea salt, beer, honey, and even the dust that settles on our meals. A study of five different seafoods (oysters, prawns, squid, crabs, and sardines) found traces of plastic in every sample tested. The study found plastic levels of 0.04 milligrams (mg) per gram of tissue in squid, 0.07mg in prawns, 0.1mg in oysters, 0.3mg in crabs, and 2.9mg in sardines. Sardines had the highest plastic content, which was a surprising result.
Another study by Plymouth University found that plastic was present in a third of UK-caught fish, including cod, haddock, mackerel, and shellfish. Scientists at Ghent University in Belgium calculated that shellfish lovers are eating up to 11,000 plastic fragments in their seafood each year. While we absorb fewer than 1% of these plastics, they will still accumulate in the body over time.
Microplastics can enter seafood in various ways, including through the ingestion of plastic particles in the water or the consumption of smaller organisms that have ingested plastics. Larger pieces of plastic can also break down into microplastics, which can then be ingested by marine life. The effects of consuming plastic-contaminated seafood on human health are not yet fully understood, but it may take decades to fully comprehend the consequences as some effects may be cumulative and appear only after several years. However, growing research shows that microplastics are endocrine disruptors, which means they can interfere with the production and regulation of hormones. They can also act as a vessel for harmful substances to enter the body, absorbing chemicals linked to cancers and weakened immune systems.
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Plastic in bottled water
Plastic pollution is a growing concern, and it has been discovered that microplastics are present in our water supply. Studies have shown that bottled water contains plastic particles, with researchers detecting thousands of tiny plastic bits in single-use bottles. The plastic particles are so small that they are nearly untraceable, with some thinner than a human hair.
Using lasers, scientists were able to detect hundreds of thousands of previously invisible plastic particles in bottled water. These microplastics, smaller than 5mm in length, can further break down into nanoplastics, which are less than 1 μm in size. These nanoparticles are small enough to enter the body's cells and tissues, and have been found in human blood, lungs, gut, feces, and reproductive tissues.
The potential health effects of these microplastics are still unknown, but experts recommend minimizing exposure to plastic whenever possible. The World Health Organization (WHO) has acknowledged the need for more research, as the current evidence base is limited. While the FDA has strict standards for bottled water quality and regulates the safety of materials that package food products, the presence of plastic particles in bottled water is a concerning issue that requires further investigation and action.
Some ways to reduce exposure to plastic include switching to reusable water bottles made of glass, aluminum, or stainless steel, and avoiding single-use plastics such as plastic bags, straws, and utensils. It is also recommended to avoid microwaving food or beverages in plastic containers, as heat can cause the release of plastic chemicals.
It is worth noting that plastic pollution is not limited to bottled water, and it has been found in tap water, beer, and sea salt as well. The popularity of bottled water contributes significantly to the world's plastic pollution problem, with Americans purchasing upwards of 15 billion gallons of bottled water each year. By choosing reusable alternatives and reducing our reliance on single-use plastics, we can collectively take action to minimize plastic pollution and its potential impact on our health and the environment.
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Plastic in food packaging
Plastic is a versatile material used in food packaging for a variety of reasons. It is lightweight, durable, and can be moulded into various shapes, making it ideal for protecting and preserving food. Different types of plastics used in food packaging include:
- Polyethylene terephthalate (PET): This plastic is known for its strength, lightweight, and crystal-clear colouring. It is commonly used in food packaging for grab-and-go containers, cookie trays, and bottles for condiments, nut butters, and cooking oils.
- Polyvinyl chloride (PVC): PVC is a versatile plastic found near baked goods and used for food packaging such as tubing for beverages, blister packaging for gum, and cling wraps.
- Polypropylene (PP): PP is a durable and shiny thermoplastic that can withstand heat. It is commonly used in food packaging for sour cream and cream cheese tubs, yoghurt packets, and chip bags.
- Low-density polyethylene (LDPE): LDPE is a thermoplastic used in bread and frozen food packaging, as well as flexible lids and various containers.
- High-density polyethylene (HDPE): HDPE is known for its high impact resistance and melting point. It is used in water bottles, margarine and butter tubs, and box liners.
While plastic packaging has its advantages, there are concerns about the potential health and environmental risks associated with its use. Studies have found that microscopic bits of plastic, known as microplastics, can contaminate food and beverages when consumers unwrap plastic packaging. These microplastics can also migrate into food when the packaging is heated, washed for reuse, exposed to sunlight, or subjected to mechanical stress.
Additionally, chemicals such as plasticizers, including phthalates and bisphenols like BPA, can leach into food from plastic packaging and have been linked to various health concerns. There are limited regulations restricting the use of these chemicals in food production, and more research is needed to understand the full extent of their impact on human health.
To address environmental concerns, some companies are exploring sustainable packaging options, such as using recycled materials or reducing the use of plastic packaging altogether. The FDA, for example, evaluates the use of recycled plastics in food packaging on a case-by-case basis to ensure the recycling process produces plastic of suitable purity for food-contact applications.
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Plastic in meat and produce
Plastic contamination in meat products can occur due to a variety of reasons, including breakdowns in production and packaging processes. In the case of the Riverbend Ranch beef sticks, consumer complaints of transparent pieces of plastic in the beef stick products prompted the recall. It is important to note that no confirmed reports of injury or illness due to the consumption of these products have been reported. However, consumers who are concerned about any potential health risks are advised to contact a healthcare provider.
Produce, on the other hand, is often packaged in plastic bags or containers. Wholesale produce bags made of plastic are commonly used in grocery stores and markets to store and sell fresh fruits and vegetables. These bags come in a variety of sizes and styles, including clear plastic vented bags, soft loop handle bags, and kraft paper produce bags with clear plastic windows. While plastic packaging for produce is convenient and widely used, there are growing concerns about the environmental impact of plastic waste. As a result, some retailers and consumers are exploring alternative packaging options, such as paper bags or bringing their own reusable bags.
Additionally, it is important to note that plastic contamination can occur in other food products as well. For example, in the Netherlands, there was an issue with plastic contamination in cola-flavored gummies. While it is not a widespread issue, it highlights the importance of proper quality control measures in food production to ensure consumer safety and product integrity. Overall, the presence of plastic in meat and produce is a concerning issue that requires the attention of food manufacturers, regulators, and consumers alike to ensure the safety and sustainability of our food systems.
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Frequently asked questions
Microplastics have been found in fruits and vegetables, seafood, tea, rice, bottled water, and even salt.
Plastic enters our food through environmental contamination, primarily from the soil and water used to grow or raise food. It can also enter during food processing, as plastic is used in tubing, conveyor belts, and gloves.
There are currently no standard definitions or regulations for microplastics and nanoplastics, and limited scientific research on their impact on human health. The FDA is monitoring research and taking steps to ensure food safety. The US federal government has banned BPA in baby bottles and infant formula cans.
