Bottled Water: A Plastic Particle Treasure Trove
One liter of water — the equivalent of two standard-size bottled waters — contained an average of 240,000 plastic particles from seven types of plastics, including nanoplastics, according to a March 2024 study. This astronomical figure makes bottled water one of the most contaminated beverages on the market.
What’s truly shocking is that these microscopic particles are so small they can’t even be seen with the naked eye. In fact, researchers found that bottled water contains roughly twice as many plastic particles compared to tap water. It was also found that the single largest source of plastic ingestion globally is through water, both bottled and tap. The convenience of grabbing a plastic bottle might be costing us more than we realize – our bodies are essentially becoming storage units for these tiny fragments.
Rice: The Unexpected Plastic Absorber
Rice might seem like one of the simplest foods out there, but it’s surprisingly high on the microplastic contamination list. In fact, a University of Queensland study found that eating just half a cup of rice could expose you to three to four milligrams of microplastics, with instant rice containing as much as 13 milligrams per serving.
The contamination levels vary dramatically between rice types, with instant varieties being the worst offenders. Washing your rice before cooking reduces plastic contamination by 20 to 40%. This simple step could significantly reduce your exposure, yet most people skip this crucial preparation method.
Tea Bags: Billions of Particles in Every Cup
A study conducted by McGill University discovered that steeping a single tea bag in hot water releases around 11.6 billion microplastic particles and 3.1 billion even smaller nanoplastics into your beverage. That afternoon cup of tea suddenly doesn’t seem so relaxing when you consider you’re essentially drinking liquid plastic.
Tea bags are typically made of plastic, so when they’re 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. The heat accelerates the breakdown process, making this contamination particularly concerning for hot beverage lovers.
Apples: When Healthy Eating Gets Complicated
Apples have traditionally been the poster child for healthy eating, but even this wholesome snack isn’t safe from microplastic pollution. Recent research, like this 2021 study, suggests plants can absorb microplastics through their root systems, transporting them into their leaves, stems, and fruit. Moreover, apples topped the list of most contaminated fruits, with over 100,000 microplastic particles found per gram.
In 2020, Italian researchers found microplastic in fruit and vegetables. Apples and carrots have the highest levels of microplastic particles. The contamination occurs through root uptake, where plants literally drink contaminated water and transport the plastic particles throughout their tissues. Even washing won’t remove these embedded particles.
Carrots: Underground Plastic Collectors
Root vegetables like carrots are also particularly vulnerable to microplastic contamination. They were found to be the most contaminated vegetables in a study examining microplastics in produce. Since they grow underground and absorb nutrients (and pollutants) straight from the soil, it’s no surprise that they pick up plastic particles, too. A single gram of carrot can actually contain more than 100,000 microplastic fragments.
The underground environment makes carrots especially susceptible because they’re constantly in contact with soil that has been contaminated by microplastics. Fruit is more highly contaminated than vegetables. This is because fruit trees are older with deeper, more established root systems, and so they take in more water compared to vegetables.
Salt: Seasoning Your Food with Plastic
One study found that of 39 brands of salt, only three did not contain microplastics. Researchers estimated an average adult consumes around 2,000 microplastic particles a year from salt. Even the most premium salts aren’t immune to contamination.
Salt can be packed with plastic. A 2023 study found coarse Himalayan pink salt mined from the ground had the most microplastics, followed by black salt and marine salt. Himalayan pink salt is often marketed as a healthier, more natural alternative to table salt. Although it’s true that the salt is minimally processed, it also contains a shocking amount of microplastics. A 2023 study, for instance, revealed that salts mined from land, like Himalayan and black salt, have even more microplastics than ocean-derived sea salts.
Sugar: The Sweet Problem Nobody Talks About
Sadly, we have a bitter truth for lovers of all things sweet. Sugar is a significant source of microplastic exposure. A 2022 research effort examining various commercial and unbranded sugars found plastic particles in every sample tested. So, refined sugar appears to be a major carrier of microplastics, making it one of the least expected yet widely eaten sources of these pollutants.
Sugar is also “an important route of human exposure to these micropollutants,” according to a 2022 study. The contamination likely occurs during processing and refinement, where industrial equipment and packaging materials contribute particles to the final product.
Seafood: Ocean to Plate Contamination
It’s no secret that marine life is heavily affected by plastic pollution, and fish are no exception. Data has shown that fish, especially species such as grouper, flathead, scad, and barracuda, contain hundreds of microplastic particles per serving. Additionally, even processed products like fish sticks show contamination levels just under 100 particles per serving. Because of how pervasive microplastics are in our oceans, fish regularly ingest them, which is how they make their way into our seafood.
There are 24 trillion pieces of microplastics in the ocean, so it’s unsurprising that sea animals often ingest plastic. When eating an oceanic creature, you’re also eating all the plastics it has consumed. Researchers estimate an average person consumes about 53,864 particles of microplastics annually from seafood, an equivalent to 17 credit cards.
Breaded Shrimp: The Worst Protein Offender
Mean (±stdev) MP contamination per serving among the products was 74 ± 220 particles (ranging from 2 ± 2 particles in chicken breast to 370 ± 580 in breaded shrimp). This makes breaded shrimp one of the most contaminated protein sources available in grocery stores.
Finally, since shrimp are bottom-feeders, they are particularly prone to consuming plastics and pollutants that sink to the ocean floor. That’s why a typical serving of breaded shrimp contains around 300 microplastic fragments. The combination of their feeding habits and heavy processing creates a perfect storm for microplastic accumulation.
Milk and Dairy Products: Contamination from Farm to Table
Small plastic particles known as microplastics have been detected in dairy and meat products and in the animals themselves. Research conducted by The Free University of Amsterdam and commissioned by the Plastic Soup Foundation (PSF), analyzed samples related to cows – milk, meat, feed and blood – collected from six farms in the Netherlands including organic farms. Plastics were found in all blood samples, all non-fresh feed samples, 18 of the 25 milk samples, and seven of the eight beef samples.
Skimmed milk samples collected from different cities in Ecuador and packed in PE containers contained MPs (2.48–183.37 µm; both fragments and fibers), ranging from 16 to 53 MPs per liter. The presence of MPs in the milk samples was suggested as the result of milk processing methods. Dairy products and breast milk are found to be contaminated with microplastics. Most microplastics in dairy products and human breast milk are fibers and fragments. Dairy and breast milk mainly contain polyethylene and polypropylene microplastics commonly.
