Sofia Martinez
Tea bags are a convenient way to make a cup of tea, but they may also be a source of plastic pollution. Many tea bags use plastic to keep them sealed shut, and even paper tea bags often contain plastic fibres in the sealant. When heated, plastic is more likely to melt and leach chemicals, which can be harmful to human health. With growing awareness of the issue, some tea brands are working to eliminate plastic from their tea bags, but not all companies are transparent about their use of plastic. As such, it can be difficult to determine whether a tea bag is truly plastic-free.
| Characteristics | Values |
|---|---|
| Plastic in tea bags | Many tea bags contain plastic used to seal the bags, such as polypropylene, nylon, and PET plastic. |
| Health risks | The plastic in tea bags can release harmful chemicals when heated, and people may be ingesting microplastics and nanoplastics with their tea. |
| Environmental impact | Plastic tea bags can take hundreds of years to decompose naturally and contribute to microplastic pollution. |
| Alternative materials | Some companies are using biodegradable materials, such as paper, corn starch, and plant-based bioplastics, to seal tea bags. |
| Reducing plastic use | Popular brands like PG Tips, Yorkshire Tea, and Clipper are working to eliminate or reduce plastic in their tea bags. |
| Identifying plastic-free tea bags | It can be difficult to determine if a tea bag is plastic-free by sight alone. Consumers should look for brands that explicitly state their tea bags are 100% plastic-free. |
| Recommendations | Consumers concerned about plastic in tea bags can switch to loose leaf tea, use cloth tea bags, or choose plastic-free brands like Yogi Tea, Bigelow Tea, and Traditional Medicinals. |
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What You'll Learn
Plastic tea bags can shed billions of microplastic particles into your drink
The type of plastic most often used to seal tea bags is polypropylene, which is marked with a recycle number 5. While this is considered a safer plastic than some others, it is still not recommended that it be heated. Other plastics used in tea bags include nylon and PET plastic. These plastics can take hundreds of years to decompose in nature and may fragment into particles that range in size from 1 µm to 5 mm.
The health consequences of ingesting microplastics are still unclear, but studies have shown that they have the potential to affect the digestive, respiratory, endocrine, reproductive, and immune systems. They have also been linked to infertility and miscarriage. In addition, the chemicals added during plastic production have been associated with endocrine system disruption and cancer.
To reduce exposure to microplastics, experts recommend using loose-leaf tea with a stainless steel infuser or a reusable filter. It is also important to avoid putting tea bags that contain plastic in the compost, as this will introduce chemicals back into the food chain as plants absorb them from the soil.
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'Food-grade' polymers, such as nylon, are used in tea bags
Plastic is prevalent in tea bags, with a recent study showing that a single plastic tea bag can shed up to one billion microplastic particles into a single cup of tea. This is particularly concerning given that tea is often made with water heated to 95°C or more, a temperature at which even 'food-grade' plastics can break down and release harmful materials.
Food-grade polymers, such as nylon, are used in tea bags. Nylon tea bags are often marketed as "silken" or "silky", which may confuse consumers as some upscale brands package their teas in real, biodegradable silk or cotton. However, nylon is a form of plastic, and these tea bags can release billions of microplastics and nanoplastics into each cup of tea. These nanoparticles are small enough to enter human cells and have been shown to cause oxidative and inflammatory imbalance in intestinal studies on animals.
In addition to nylon, other plastics commonly found in tea bags include polypropylene, PET plastic, and epichlorohydrin. Polypropylene is frequently used in manufacturing tea bags despite being classified as a plastic of concern by the European Union due to its persistence, accumulation in human fatty tissues, and toxicity. A recent study tested six tea brands, finding that four of them included polypropylene, one was nearly entirely composed of nylon, and the sixth was thought to be biodegradable and free of plastic residue.
Some tea companies are working towards eliminating plastic from their tea bags. For example, PG Tips and Yorkshire Tea are working to remove plastic from their tea bags, and Harney & Sons is investigating a fully biodegradable alternative. Consumers concerned about plastic in their tea bags can look for brands that advertise as being 100% plastic-free, use loose leaf tea with a reusable strainer, or opt for tea bags made from compostable materials like sugarcane or unbleached paper.
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Plastic tea bags can release harmful materials when heated
The health consequences of ingesting microplastics and nanoplastics are still unclear, but the absence of evidence of toxicity does not imply safety. Studies have found that microplastics can enter human cells and may have negative effects on other species, including algae, zooplankton, fish, and mice. These effects include endocrine disruption, reproductive toxicity, increased cancer risk, problems with metabolism and nutrition, and interference with neurodevelopment.
In addition to the health risks, plastic tea bags also contribute to plastic pollution. When disposed of, plastic tea bags can take hundreds of years to decompose, adding to the growing problem of plastic waste in the environment.
To avoid the potential risks associated with plastic tea bags, consumers can switch to loose-leaf tea or instant tea. They can also look for tea brands that use paper tea bags without plastic sealants or use cloth-based tea bags. Some popular tea brands in the UK, such as PG Tips and Yorkshire, are also working on eliminating plastic from their tea bags.
It is worth noting that even "microwave-safe" plastic does not guarantee safety from harmful chemicals. Heating plastic is never recommended, as it can cause the plastic to melt and release chemicals. Consumers should avoid plastics in general and heated plastics at all costs to limit their exposure to potentially harmful substances.
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Plastic tea bags cannot be composted
The plastic in tea bags can have negative health and environmental consequences. When heated, plastic is more likely to melt and leach chemicals. A recent study showed that one plastic tea bag can shed one billion microplastic particles into a drink. These microplastics can then be ingested by humans, with unknown health consequences. Additionally, disposing of plastic tea bags adds to the plastic problem. When put into a compost heap, plastic tea bags will break down into microplastics, which will be absorbed by plants and re-enter the food chain.
To avoid the negative impacts of plastic tea bags, consumers can switch to loose-leaf tea or tea bags made from natural fibres such as paper. Some popular brands, such as PG Tips and Yorkshire Tea, are working to eliminate plastic from their tea bags. When choosing tea bags, it is important to look for brands that are transparent about their materials and are committed to plastic-free packaging.
While some tea bags are marketed as "biodegradable," this does not necessarily mean they are compostable. Biodegradable tea bags may still contain plastic, which will break down into microplastics. These tea bags can be harmful to the environment, as the microplastics can contaminate the soil and harm plant life. Therefore, it is important to check whether tea bags are truly plastic-free and compostable before disposing of them in a compost heap.
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Some tea brands are working to eliminate plastic from their tea bags
Many tea brands are transitioning to plastic-free tea bags or are working towards eliminating plastic from their tea bags. For instance, Yorkshire Tea and PG Tips are working on removing plastic from their tea bags. Similarly, Pukka Herbs offers plastic-free, fully compostable tea bags made from organic cotton stitching instead of staples or polypropylene. The tea bag paper consists of natural abaca, wood pulp, and plant cellulose. Another well-known brand, Clipper, offers tea bags that are plastic-free and biodegradable. Their tea bags are made from natural plant-based fibers, including abaca and biopolymer. Good and Proper Tea offers 100% plastic-free tea bags made from Soilon, a plant-based material derived from corn starch. These tea bags are fully compostable.
Some tea brands are transitioning to polylactic acid (PLA)-based material for their tea bags. For example, Yorkshire Gold seals their bags with PLA, although there are concerns that plant-based plastics are just as harmful as conventional plastics. Lyons is another brand that uses a small amount of thermoplastic fibers (less than 5%) to seal their tea bags and prevent tea leaves from escaping. Tetley is also working towards eliminating plastic from their tea bags, with their current Tetley All Rounder tea bags being comprised of 75% cellulose fibers and 25% food-safe plastic.
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Frequently asked questions
No, not all tea bags contain plastic. However, many popular brands use plastic to seal the bags or provide structure.
The type of plastic most often used to seal tea bags is polypropylene, which is marked with a recycle number 5. Other plastics used include nylon, PET, and bioplastics such as PLA.
Yes, there are some tea brands that offer plastic-free tea bags. Examples include Yogi Tea, Bigelow Tea, Red Rose Tea, Traditional Medicinals, and Yogi Tea. Some companies, such as PG Tips and Yorkshire Tea, are also working towards eliminating plastic from their tea bags.
Tea bags are subjected to high temperatures during brewing, and even "food-grade" plastics can break down and release harmful materials when heated. As a result, people who drink tea frequently may be consuming billions of plastic particles, which may have negative health and environmental impacts.
To avoid consuming plastic from tea bags, consider switching to loose leaf tea and using a glass, metal, or ceramic strainer. You can also look for tea brands that offer plastic-free tea bags, such as those mentioned above. Additionally, be cautious of greenwashing claims, as some companies may market their products as plant-based or biodegradable when they still contain bioplastics or other forms of plastic.
