Are microplastics in tea bags harmful during pregnancy?
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What's actually in it
Many tea bags are made from nylon, a type of plastic. When you steep these bags in hot water, they don't just stay in one piece. They shed microplastics directly into your tea.
According to a 2026 study in Environ Sci Process Impacts, researchers used advanced imaging to confirm that these plastic particles are released during the brewing process. You are essentially drinking plastic every time you use a nylon tea bag.
What the research says
A 2026 study in J Hazard Mater found that these tea bag-derived microplastics are not harmless. When tested on embryonic zebrafish, the particles caused steatosis (a buildup of fat in the liver) and oxidative stress (cell damage caused by an imbalance of free radicals).
Because these particles trigger toxicity at the embryonic stage, the science suggests that exposure to these materials carries clear risks. When you are pregnant, what you consume reaches your developing baby. These findings highlight the danger of using plastic-based tea bags for your daily brew.
The research at a glance
| Study | Journal | Year |
|---|---|---|
| Teabag-derived microplastics pose steatosis and oxidative stress-mediated toxicity in embryonic zebrafish. | J Hazard Mater | 2026 |
| Brewing plastics: OCT reveals microplastic release from nylon tea bags in simulated brewed tea infusions. | Environ Sci Process Impacts | 2026 |
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