Microplastics in Tea Bags: Safe Swaps for Pregnant Moms
Your morning cup of tea might be releasing billions of plastic particles into every sip, and the fix is simpler than you'd think.
TL;DR:
- Many conventional tea bags, including paper ones, contain plastic that releases microplastics and nanoplastics into hot water during steeping.
- Loose leaf tea steeped in a stainless steel infuser is the cleanest, most budget-friendly long-term swap.
- If loose leaf isn't realistic, look for plastic-free, unbleached paper tea bags from certified organic brands.
Key Takeaways
- A 2024 study published in Chemosphere found that some tea bags release millions of microplastic particles per milliliter of boiling water, with estimates ranging from 8 million to 1.2 billion particles per steep.
- Most standard paper tea bags also contain a heat-seal plastic strip along their edges, meaning even bags that look like "just paper" can still contribute to microplastic exposure.
- The swap doesn't have to be expensive. A stainless steel infuser costs under $10 and pays for itself within weeks if you buy bulk loose leaf tea.
Why Does This Matter for Pregnant Women and New Moms?
If you're pregnant or breastfeeding, this one is worth paying attention to. Microplastics have been detected in human breast milk and placental tissue, which means exposure can reach your baby even before or without direct consumption. Peer-reviewed research has confirmed microplastics in human placental samples, raising ongoing questions about what that means for fetal development.
Tea is often one of the first things pregnant women reach for as a coffee substitute. That makes the tea bag question especially relevant during the prenatal window, when reducing unnecessary exposures is a reasonable and practical priority.
What's Actually in a Tea Bag?
Are All Tea Bags Made of Plastic?
Most tea bags contain at least some plastic, including many that look like plain paper. Not all, but more than most people realize. Beyond Plastics reports that a growing number of tea companies now package their tea in bags made from nylon or polyethylene terephthalate, also called PET (a type of plastic most commonly associated with water bottles). These plastic mesh bags are often marketed as "silky" or "pyramid" style bags and release the highest particle counts when exposed to boiling water.
But paper bags aren't automatically safe. The majority of standard paper tea bags also contain a heat-seal plastic strip along their edges, used to close the bag during manufacturing. Beyond Plastics notes this strip is present in most mass-market paper tea bags, even ones that appear to be 100% paper.
What this means for your family: Even if the bag looks like paper, it may still release plastic particles into your tea when steeped in boiling water.
How Many Microplastics Are We Talking About?
The particle counts are higher than most people expect, and heat is a major driver. A 2024 study from the Autonomous University of Barcelona (UAB), covered by Beyond Plastics, found that steeping a single tea bag can release between 8 million and 1.2 billion microplastic and nanoplastic particles per milliliter of boiling water. An earlier 2019 McGill University study put the figure at approximately 11.6 billion microplastic and 3.1 billion nanoplastic particles from a single plastic tea bag steeped at 95°C.
Nanoplastics (particles smaller than 1 micrometer) are considered especially concerning because their tiny size may allow them to cross biological barriers more easily than larger microplastic particles.
What this means for your family: Heat accelerates plastic particle release, which means your daily steeping habit may be one of your higher daily microplastic exposures without you realizing it.
What Should You Steep Instead?
Good, Better, Best: The Tea Swap Tier System
Good: Organic brands using plastic-free, unbleached paper bags
If switching to loose leaf isn't realistic right now, this is your starting point. Look for tea brands that explicitly state their bags are free from plastic and are made from unbleached paper. Bleached bags can introduce chlorine-based compounds; unbleached bags are brown or off-white in color, not bright white.
Brands worth looking at include Pukka Herbs, whose bags are made from a blend of banana fiber, wood pulp, and plant cellulose stitched with organic cotton thread. No heat-seal plastic, no bleach.
SCRUNCHY MOM TIP: Flip the box over and look for the words "plastic-free," "heat-seal free," and "unbleached" on the packaging. If those words aren't there, assume the bag contains a heat-seal plastic strip.
Better: Compostable or plant-based tea bags with verified certifications
Some brands are moving toward plant-based bioplastics such as PLA (polylactic acid). These are better than nylon or PET, but still deserve scrutiny. Look for third-party certifications and verify that the bioplastic is genuinely compostable under home conditions, not just industrial composting facilities.
Best: Loose leaf tea steeped in stainless steel
Loose leaf tea eliminates the bag entirely. Bulk loose leaf from organic brands is almost always cheaper per cup than bagged tea, especially for everyday drinkers. The equipment investment is low. A basic stainless steel mesh basket infuser or a small stainless French press-style tea steeper costs under $15 and has no plastic contact with hot liquid.
Stainless steel is the material of choice here because it doesn't leach, doesn't require coatings, and holds up to daily cleaning without breaking down. Look for 304 or 316 food-grade stainless steel with no additional coatings or adhesives.
How Do You Make the Switch Without Overwhelming Yourself?
You don't need to overhaul your whole pantry at once. One infuser and one bag of loose leaf is enough to start. This transition is genuinely low-effort and low-cost compared to most clean living swaps.
What If You're on a Tight Budget?
Start with one stainless steel infuser and a small bag of loose leaf tea in whatever variety you already drink. Don't stress yet about replacing every tea bag in your pantry. Use up what you have, then restock with loose leaf.
A basic stainless steel basket infuser runs $5 to $12 at most kitchen stores or online. Loose leaf tea in common varieties (green, chamomile, black) is widely available from organic brands at a per-cup cost that beats most bagged options within the first week of use.
Ideally, you'd have a dedicated loose leaf setup with a quality infuser from the start. But if that's not realistic right now, transitioning to plastic-free unbleached paper bags from a verified brand is a meaningful scrunchy middle ground.
Start here this week: Order one stainless steel infuser and one small bag of organic loose leaf tea in a variety you already enjoy. Steep it this weekend and see how the transition actually feels before committing to anything larger.
Good Brands to Buy
- Pukka Herbs — Certified organic, bags made from banana fiber and plant cellulose, stitched with organic cotton. No heat-seal plastic. One of the most widely available plastic-free bagged tea options.
- Numi Organic Tea — Uses unbleached paper tea bags and offers several plastic-free certified options. Available at most grocery stores, making it a practical everyday swap.
- Rishi Tea — Certified organic, compostable packaging, and transparency about materials. Their loose leaf line is excellent for bulk buying.
- Republic of Tea — Offers unbleached, plastic-free paper bag options with clear labeling. Budget-friendly at most retailers.
- Yogi Tea — Uses unbleached paper tea bags with a string and tag construction (no staples, no plastic seal). Widely available and affordable.
For the brewing setup, look for a stainless steel loose leaf infuser at a kitchen goods store near you, or a stainless steel tea kettle paired with a basket strainer. The goal is zero plastic contact with hot water.
Tea Bag Swap at a Glance
| Scenario | Recommended Swap | Budget Level | Notes |
|---|---|---|---|
| Daily bagged tea drinker | Stainless steel infuser + organic loose leaf | $ (pays off fast) | Best long-term option |
| Can't give up bagged tea yet | Plastic-free, unbleached paper bags | $$ | Verify "heat-seal free" on label |
| Pregnant or breastfeeding | Loose leaf only, stainless infuser | $ | Minimize all plastic-heat contact |
| Gifting a new mom | Loose leaf starter kit + stainless infuser | $–$$ | Practical, low-waste gift |
| On-the-go or at work | Stainless steel travel infuser mug | $$ | No plastic contact, portable |
FAQ
Q: Are all paper tea bags safe from microplastics?
No, and this surprises most people, because paper bags look and feel plastic-free. Most standard paper tea bags contain a heat-seal plastic strip along their edges that allows the bag to be sealed during manufacturing. When exposed to boiling water, this strip can release microplastic particles into your drink. A November 2024 study published in Chemosphere analyzed tea bags purchased from Amazon, Aliexpress, and a supermarket, and found microplastic-releasing materials across all three samples, including bags that appeared to be primarily paper. Look specifically for bags labeled "heat-seal free" or "plastic-free," not just "paper," and check that the bag material is listed explicitly on the packaging.
Q: Is loose leaf tea always better than bagged tea?
For microplastic exposure specifically, yes, and the difference is meaningful. Loose leaf tea steeped in a stainless steel infuser removes the bag from the equation entirely, which eliminates the primary microplastic source in conventional tea preparation. The 2019 McGill University study published in Environmental Science & Technology found that a single plastic tea bag steeped at 95°C released approximately 11.6 billion microplastic particles and 3.1 billion nanoplastic particles into the water, numbers that add up quickly with daily use. Beyond microplastics, loose leaf tea quality is often higher and the cost per cup is lower when buying in bulk. The main barrier is the small upfront cost of an infuser, which typically runs $5 to $15.
Q: Can I just use a reusable fabric or mesh tea bag?
It depends entirely on the material, so this one is worth reading carefully before you buy. Synthetic mesh bags made from nylon or polyester can still release microplastics into hot water. The same mechanism that makes conventional plastic tea bags a concern applies here too. If you prefer a reusable bag-style option over a rigid infuser, look for bags made from 100% organic cotton muslin, which is a plant-based fiber that doesn't shed plastic particles. It is sensible to prioritize non-synthetic materials whenever they come into contact with hot liquids, particularly for pregnant women and young children. Stainless steel remains the most durable and lowest-risk option for daily use, but certified organic cotton muslin is a reasonable plastic-free alternative.
About the Author
Jenn Smith, RN BSN, is a registered nurse, mom, and co-founder of Scrunchy Living. She writes evidence-based guides to non-toxic living, pregnancy-safe products, and clean home practices for modern families.
This article is for educational purposes only and is not intended as medical advice. Always consult your healthcare provider regarding dietary choices during pregnancy or while breastfeeding.
Shop These Recommendations
| Product | Why It's Worth It | Where to Buy |
|---|---|---|
| Numi Organic Tea | Unbleached paper tea bags with plastic-free certified options — an easy everyday swap available at most grocery stores. | numitea.com |
| Rishi Tea | Certified-organic loose-leaf tea with compostable packaging; ideal brewed in a stainless steel infuser to skip bags entirely. | rishi-tea.com |
| Yogi Tea | Unbleached paper bags with string-and-tag construction (no plastic seal or staples); widely available and affordable. | yogiproducts.com |
From Scrunchy Living: The Non-Toxic Home Starter Kit ($74.99) replaces your household cleaners with one EWG Verified concentrate — quats-free, fragrance-free, and safe for pregnancy and babies. Includes a full year of ScrunchyAI, our ingredient-scanning tool for non-toxic families. Start your free 14-day trial →
You Might Also Like
- 7 Swaps to Cut Microplastics in Your Home | Scrunchy Living
- Best Non-Toxic Cookware & Kitchen Swaps
- Scrunchy All-Purpose Wipes — Our most-loved non-toxic cleaning essential — safe for babies, surfaces, and the whole family.