Is it safe to use plastic tea bags in hot water?
No. Plastic tea bags release microplastics directly into your drink when steeped in hot water, which can cause metabolic and gastrointestinal issues.
What's actually in it
Many tea bags that look like paper or silk are actually made from polyethylene terephthalate (PET). This is a type of plastic. When you pour boiling water over these bags, the plastic begins to break down. This process releases tiny particles known as microplastics and nanoplastics directly into your tea.
These particles are small enough to be ingested with every sip. Once inside your body, they don't just pass through without an effect. They interact with your system at a cellular level, as shown in a 2026 study in Part Fibre Toxicol.
What the research says
The science on plastic exposure is clear. A 2026 study in Drug Chem Toxicol found that even a single exposure to PET microplastics can lead to metabolic and gastrointestinal disruption. This means your body's ability to process energy and manage digestion can be negatively impacted by these plastic particles.
Peer-reviewed research continues to highlight the risks of these materials. A 2026 systematic review in Environ Health confirms that there are real health impacts associated with the presence of micro- and nanoplastics in the human body. When you steep a plastic tea bag in hot water, you are essentially creating a delivery system for these harmful materials.
The research at a glance
What to use instead
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