Tea is one of the most widely consumed beverages on earth. It's also one that most people assume is inherently clean — just dried leaves and hot water, right? The reality is more complicated. Over the past two decades, the tea industry quietly shifted from simple paper bags toward pyramid-shaped and silken mesh bags made from synthetic polymers. These look premium. They steep efficiently. And when you pour boiling water over them, they shed billions of microplastic particles directly into your cup.
The McGill University finding — 11.6 billion microplastic particles from a single bag — isn't an outlier. It's been replicated in subsequent studies. The good news is that the fix is simple: choose unbleached paper bags from the right brands, or switch to loose-leaf tea entirely. This guide tells you exactly which brands pass the test, which to avoid, and what to look for on a label when you're not sure.
Quick Picks
| Best for | Pick | Why it made the list |
|---|---|---|
| Best overall | Numi Organic Tea | Unbleached abaca-fiber bags with no plastic content, USDA Organic certified, and full-leaf quality tea. |
| Best herbal | Traditional Medicinals | Unbleached Manila hemp paper bags with no plastic heat-seal — decades of proven material safety. |
| Best value | Pukka Herbs Organic Tea | Plant-based cellulose bags (zero petroleum plastic) at the best per-bag price in the category (~$0.40/bag). |
| Zero-plastic solution | Stainless Steel Loose Leaf Infuser + Rishi Tea | Eliminates the tea bag entirely — 18/8 stainless infuser with premium loose-leaf tea costs less per cup long-term. |
Section 1: The Problem — How to Identify Plastic Tea Bags
Not all tea bags are created from the same material. The shift toward pyramid and "silken" bags has introduced two primary plastic polymers into the tea-steeping process — and many consumers have no idea they're drinking them.
The Worst Offenders: Nylon and Polypropylene
Nylon (polyamide) is used in the fine-mesh pyramid bags popularized by premium tea brands. It creates a large brewing chamber that allows full-leaf teas to expand and steep freely — which does improve flavor compared to cramped flat bags. The problem is that nylon is a plastic, and when submerged in water at or near boiling point, it sheds micro- and nanoplastic particles. PG Tips pyramid bags are the most prominent commercial example confirmed to use polypropylene mesh.
Polypropylene (PP) appears in pyramid bags and also as an invisible heat-seal strip along the edge of many conventional flat paper bags. This is the sneaky one: a bag can look like plain paper and still contain polypropylene adhesive used to seal it shut. When the hot water hits that seal, it releases particles just like the more obviously plastic mesh bags do.
PET (polyethylene terephthalate) is used in some transparent "crystal" bag formats. Less common than nylon and PP, but present in certain specialty tea products.
What Safe Tea Bags Look Like
In contrast, truly plastic-free bags are made from one of the following:
- Unbleached paper — manila hemp, abaca fiber (derived from banana plants), or wood pulp. Brown-colored, not bright white. Stapled or glued closed — not heat-sealed with a shiny synthetic strip.
- Organic cotton muslin — used in some loose-leaf tea products and reusable bags. Fully natural, zero plastic.
- Hemp fiber — uncommon commercially but used in a handful of specialty brands. Safe and biodegradable.
- Plant-based cellulose (PLA) — a compostable material derived from corn starch. Marketed as plastic-free, though some research has shown PLA bags can still release particles at boiling temperatures. Better than nylon, but not the gold standard.
Many tea brands describe their pyramid bags as "silken" or "mesh" — language designed to evoke quality, not disclose material. Unless the brand explicitly states the bag is paper, cotton, or certified compostable PLA, assume it contains nylon or polypropylene. When in doubt, read our full breakdown of plastic tea bag materials.
The Bleached Paper Problem
Even within paper tea bags, there's a secondary concern: bleaching. Bright-white paper tea bags are chlorine-bleached — a process that can leave dioxin and organochlorine residues in the paper. These are not microplastics, but they are chemical contaminants with their own health concerns. The safest paper bags are brown-colored and explicitly labeled "unbleached."
Section 2: What to Look for When Buying Tea Bags
When evaluating a tea brand's bag safety, check these criteria in order of importance:
- Flat paper construction, not pyramid or silken. Flat bags are almost always paper. Pyramid bags are almost always plastic unless specifically disclosed otherwise.
- Unbleached paper. Brown bags indicate no chlorine bleaching. White bags may be bleached with chlorine compounds.
- Stapled or glued closed — not heat-sealed. A metallic staple or visible crimped fold indicates no plastic heat-seal. A shiny strip along the bag edge is a red flag for polypropylene adhesive.
- No staple = string and tag attached with glue or thread — both are acceptable. Some bags use a small staple to attach the string, which is fine; what matters is how the bag itself is sealed.
- USDA Organic certification. While organic certification doesn't directly address bag material, certified organic tea brands tend to be more rigorous about material inputs across their supply chain. Most of the safest bag brands are also organic-certified.
- Explicit brand disclosure. The best brands now explicitly state their bag material on packaging or their website. Look for language like "unbleached paper bags," "no plastic," or "compostable bags." Vague language like "natural" or "biodegradable" without specifics is not sufficient.
If you want complete certainty and the best-tasting cup, the answer is loose-leaf tea with a stainless steel infuser — no bag material at all, zero plastic exposure, and typically better flavor from full-leaf teas that haven't been ground into fannings and dust.
Section 3: Best Non-Toxic Tea Bags Ranked
"The safest cup of tea starts before the kettle boils — it starts with what's inside the bag."
The following products have been evaluated for bag material safety, organic certification, brand transparency, taste, and price. All recommended brands use unbleached paper bags or explicitly plastic-free materials. No pyramid or silken mesh bags are included unless the brand has confirmed plant-based construction with third-party certification. For a broader look at which tea types and brewing habits carry the most microplastic risk, see our investigation into does tea have microplastics.
Best Overall
Numi uses unbleached paper tea bags with no plastic content — the bags are made from abaca fiber (a natural plant fiber), sealed without polypropylene adhesive. USDA Certified Organic and Non-GMO Project Verified. Wide variety of black, green, white, herbal, and turmeric teas. One of the most transparent brands about their bag materials, with explicit documentation on their website. The tea quality is genuinely excellent — full-leaf and flowering teas, not dust and fannings. Slightly premium-priced but justified by both safety and taste.
Regular drinkers rank it near the top on taste — reviewers call it "one of the best green teas on the market," crisp and refreshing, and the Earl Grey and chamomile draw the same praise because you are steeping full leaves, not dust. The honest gripe that comes up most: the price has climbed, and some long-time buyers say they "can no longer justify how expensive they've become," with a few noticing a particular blend tasting lighter than it used to.
Full-leaf organic tea in a bag you can drop in boiling water without a second thought — no nylon mesh, no polypropylene seal, nothing to shed into the cup.
Why it's safe: The bags are abaca (banana) fiber paper, unbleached and folded shut with no plastic heat-seal strip — so no micro- or nanoplastics are released when you steep at boiling temperatures.
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Best Herbal
Traditional Medicinals has used unbleached paper bags for decades — predating the microplastics conversation entirely. Their bags are made from unbleached Manila hemp paper, string-attached with no staples and no plastic heat-seal. Certified organic, Non-GMO Project Verified, and Fair for Life certified. The brand specializes in herbal and functional wellness teas (Throat Coat, Smooth Move, Gypsy Cold Care) formulated with actual pharmacopoeial-grade herbs — not just flavor. If you drink herbal teas for health reasons, this is the brand that takes both ingredients and packaging most seriously. Excellent value.
This is the brand people reach for when they actually feel sick. Throat Coat drinkers say it "will literally knock the sickness out of my throat for hours," and the slippery-elm blends come across as naturally sweet and genuinely soothing rather than flavored water. The honest note: these are medicinal herbal teas, and a minority of drinkers simply do not like the earthy, licorice-leaning flavor — worth knowing if you want a dessert-style cup.
Functional herbal blends — Throat Coat, Smooth Move, Gypsy Cold Care — in a bag that has been plastic-free since long before anyone was counting microplastics.
Why it's safe: Unbleached Manila hemp paper, attached by string with no staples and no polypropylene heat-seal — nothing synthetic touches the boiling water, so nothing sheds into your cup.
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Best Value
Pukka Herbs uses plant-based cellulose (Soilon) bags — derived from corn starch, not petroleum. No nylon, no polypropylene, no PET. The brand has explicitly committed to plastic-free packaging across their entire range and has published documentation confirming their bag material composition. Certified organic by the Soil Association (UK equivalent of USDA Organic), and certified Fair Trade for all herb and spice ingredients. Pukka's blends are distinctive and thoughtfully formulated: Three Ginger, Turmeric Gold, and Wholistic Ashwagandha are standouts. The cellulose bags do perform slightly differently than paper — they're more translucent and gossamer — but they're genuinely plastic-free. Best value per bag in this category.
Drinkers describe the blends as smooth and layered — Night Time reads as "smooth and mellow" with chamomile up front and a lavender that never turns soapy, and the tulsi blends come across as earthy, sweet, and herbaceous. The honest take reviewers themselves offer: the wellness blends are a calming ritual, not magic — Night Time "won't transform sleep on its own," and a few find certain tulsi blends taste plainer than they expected.
The cheapest genuinely plastic-free option per bag — distinctive organic blends in a corn-starch cellulose sachet stitched (not melted) shut.
Why it's safe: The Soilon bag is plant-cellulose from corn starch with no nylon, polypropylene, or PET, and it is stitched closed with organic cotton — no synthetic polymer mesh and no plastic heat-seal.
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Most Accessible
Yogi Tea uses unbleached paper bags with string and tag — no staples, no plastic heat-seal adhesive. Multiple lines carry USDA Organic certification. Their signature blends (DeTox, Bedtime, Kava Stress Relief, Ginger) have a devoted following and are widely available at mainstream grocery stores, making them the most accessible option on this list. Yogi also prints clear labeling information and has confirmed their standard bags contain no plastic. One caveat: verify you're purchasing from the standard flat-bag Yogi range rather than any newer pyramid-format products that may have been introduced. Excellent entry-level option for budget-conscious shoppers who don't want to compromise on safety.
The Bedtime blend is the standout — drinkers say it is mild and relaxing with a light herbal sweetness that "doesn't feel artificial," and many report falling asleep faster and waking less after a cup 30 to 40 minutes before bed. The most common complaint is specific: the added stevia can taste overpowering to some, leaving an aftertaste they do not love.
The plastic-free brand you can grab on your next grocery run — cult-favorite blends like Bedtime and DeTox in a simple unbleached paper bag.
Why it's safe: Standard flat Yogi bags are unbleached paper with a string-and-tag closure — no plastic heat-seal strip and no nylon mesh, so no microplastics are released into the cup.
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Best Loose Leaf
If you're willing to make the switch to loose leaf, Rishi Tea is the best starting point for quality and availability. Rishi sources directly from small farms across Japan, Taiwan, China, and Sri Lanka, with USDA Organic and Fair Trade certifications on most of their lines. Their Japanese matcha, Taiwanese oolongs, and Assam breakfast blends are exceptional — the kind of tea that makes the loose-leaf conversion feel worthwhile rather than like a health chore. Pair with any stainless steel infuser (see below) and you've eliminated the tea bag problem entirely. A 3 oz tin lasts weeks for a daily drinker and costs less per cup than the bagged options above.
Tea enthusiasts consistently praise the sourcing and freshness — well-sourced leaves, good flavor profiles, and packaging that keeps the tea fresh — and often name Rishi when someone wants to step up from bagged tea. The honest tradeoff drinkers mention: it runs pricier than other loose-leaf brands, and most say the quality justifies it but suggest starting with one popular blend before buying big.
Café-grade full-leaf tea that, paired with a steel infuser, removes the tea bag from the equation completely — better flavor and zero bag material in your water.
Why it's safe: Loose leaf means no bag at all — steeped in a stainless steel infuser, there is no nylon mesh, no paper, and no heat-seal touching your water, so there is nothing to shed microplastics.
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Zero Plastic
The permanent, zero-waste solution to the tea bag problem entirely. A good stainless steel infuser pays for itself in a week if you drink tea daily. Look for 18/8 food-grade stainless steel (also labeled 304 stainless) — not chrome-plated or aluminum alternatives. The best designs have fine mesh that holds even small-leaf teas without allowing them to pass through into the cup. Popular formats include basket infusers that sit inside a mug, squeeze-style ball infusers for single-serve, and in-pot infusers for larger quantities. Avoid cheap plated infusers where the coating can chip — 18/8 solid stainless is the only material worth buying for daily use. Zero ongoing cost, zero plastic exposure, zero waste.
Owners like that a good steel basket "traps even small leaf particles without clogging" and cleans in seconds under hot water or in the dishwasher — no scrubbing — and that food-grade 304 steel resists rust and does not transfer flavors. The honest warnings from reviews: cheaper baskets with a coarser mesh let fine tea dust or powdery rooibos slip through, and a loose-fitting lid or short arms can be fiddly on a wide mug — look for an extra-fine etched mesh.
Buy it once and never buy a tea bag again — fine 18/8 steel mesh holds even small-leaf teas while keeping every trace of plastic out of your cup.
Why it's safe: Solid 18/8 (304) food-grade stainless steel is completely inert in boiling water with no coating to chip and no plastic mesh — the cleanest possible way to steep loose tea.
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Plastic-Free Tea Bag Brands at a Glance
These brands use unbleached paper or plant-fiber bags with no plastic mesh and no polypropylene heat-seal strip — the bag is folded, stitched, or knotted shut instead of melted closed. If you want a tea bag without microplastics, these are the ones to reach for.
| Brand | Bag material | How it's sealed | Verdict |
|---|---|---|---|
| Numi Organic | Abaca (banana) fiber paper | Folded — no heat-seal | ✓ Plastic-free · USDA Organic |
| Traditional Medicinals | Unbleached Manila hemp paper | Stitched/folded — no heat-seal | ✓ Plastic-free |
| Stash | 100% wood-fiber paper | Machine-folded & pressed — no glue or heat-seal | ✓ Plastic-free · compostable |
| Pukka Herbs | Plant cellulose + organic cotton stitch | Stitched — no heat-seal | ✓ Plastic-free |
| Yogi | Unbleached paper | Folded — no heat-seal | ✓ Plastic-free bag (outer envelope contains some plastic) |
| Harney & Sons (paper bags) | Plant-based paper | Knotted string — no glue, staple, or heat-seal | ✓ Plastic-free — but their nylon pyramid sachets are not |
The common thread is an unbleached, non-heat-seal tea bag material — wood pulp, abaca, or Manila hemp — closed without a synthetic adhesive. If a brand isn't listed here, check the packaging for a shiny seal strip or a "silken"/pyramid mesh before assuming it's safe.
Section 4: Brands to Avoid
The following major tea brands use plastic in some or all of their standard product lines. This doesn't mean their tea tastes bad — some are genuinely well-regarded for flavor. It means their bags shed microplastics into your cup at levels that are no longer acceptable given what the research shows.
These brands use polypropylene, nylon, or plastic heat-seal adhesives in their standard ranges. Check packaging carefully before purchasing, and assume pyramid or silken bags from any mainstream brand contain plastic unless explicitly stated otherwise.
- PG Tips (pyramid bags) — The company has confirmed their iconic pyramid bags are made from polypropylene mesh. Their flat square bags use paper, but the pyramid range — their most popular product — is plastic. The brand announced a transition timeline toward plant-based materials, but pyramid polypropylene bags were still in circulation as of early 2026.
- Tetley — Standard Tetley round bags use a paper-polypropylene composite for heat-sealing. Their "drawstring" bags avoid the staple but use a plastic string and plastic-sealed paper bag. Some premium lines have transitioned to plastic-free materials, but standard supermarket Tetley has not.
- Lipton (select lines) — Lipton's Yellow Label standard range uses paper bags with polypropylene heat-seal adhesive. Their pyramid range ("Lipton Pyramid") uses nylon mesh. Their organic lines, sold under the Lipton brand, may use different materials — read the label carefully.
- Twinings (pyramid range) — Twinings' flat bags are generally paper-based and lower risk, but their pyramid tea bag range uses nylon mesh. The flat classic English Breakfast and Earl Grey lines are safer choices within the Twinings portfolio if you prefer to stay with the brand.
- Bigelow (standard range) — Bigelow's standard flat bags use a paper-polypropylene composite sealed edge. Their "Constant Comment" and classic black tea bags fall into this category. Bigelow has not published a transition timeline as of 2026.
If you drink any of these brands regularly, switching to one of the recommended brands above — or to loose leaf — is one of the more impactful low-friction microplastic reductions you can make. For the full research on how plastic tea bags compare to other plastic exposure sources, see our deep-dive on plastic tea bags and microplastics and our guide to the best plastic-free, unbleached tea bag brands for 2026.
Section 5: Tea Bag Material Safety Comparison
Not all bag materials carry the same risk. This table summarizes what the research shows about each material type, so you can make an informed decision across different tea brands and products.
| Material | Microplastic Risk | Safety Rating | Common Use |
|---|---|---|---|
| Stainless steel infuser | None — no bag at all | Best | Loose-leaf brewing |
| Unbleached paper (abaca/hemp) | No detectable release | Excellent | Numi, Traditional Medicinals, Yogi |
| Organic cotton muslin | No microplastic release | Excellent | Reusable bags, some specialty brands |
| Plant-based cellulose (PLA/Soilon) | Low — minimal particles at boiling | Good | Pukka Herbs, some premium lines |
| Bleached paper | Low microplastic; chlorine residue concern | Acceptable | White paper bags, many mass-market brands |
| Paper with PP heat-seal adhesive | Moderate — polypropylene adhesive sheds | Avoid | Tetley standard, Bigelow, some Lipton |
| Polypropylene mesh | High — confirmed billions of particles | Avoid | PG Tips pyramid, some Tetley, some Lipton |
| Nylon mesh | Highest — 11.6 billion particles per bag | Avoid | Premium pyramid bags, "silken" bags |
Microplastics in your kitchen go beyond tea bags
Tea bags are one of many plastic exposure sources in the average kitchen. Our complete guide covers the 7 highest-impact swaps — from water filtration to cookware — ranked by exposure reduction per dollar spent.
Frequently Asked Questions
A landmark 2019 study from McGill University found that steeping a single plastic mesh tea bag in boiling water (95°C) releases approximately 11.6 billion microplastic particles and 3.1 billion nanoplastic particles into the cup. This is among the highest single-use plastic exposures identified in any food or beverage product. The study used nylon and polypropylene mesh tea bags — the pyramid-style and fine-mesh bags used by many mainstream brands. Paper tea bags (including unbleached paper bags sealed without plastic adhesives) showed no detectable microplastic release under the same conditions.
No. Traditional flat tea bags made from unbleached paper (manila hemp, abaca fiber, or wood pulp) contain no plastic. However, many popular tea brands have switched to pyramid-shaped bags made from nylon or polypropylene mesh, which are plastics. Even some paper tea bags that appear plastic-free use a thin layer of polypropylene adhesive to heat-seal the bag closed rather than glue — these also release microplastics. To confirm a bag is truly plastic-free, look for: (1) flat paper construction rather than pyramidal or silken; (2) stapled or glued closed, not heat-sealed with a shiny strip; (3) brand disclosure stating no plastic content; or (4) USDA Organic certification, which tends to correlate with more careful material sourcing.
The safest option is loose-leaf tea steeped in a stainless steel infuser — this completely eliminates any bag material from contact with your hot water. Among bagged options, unbleached paper tea bags from certified organic brands (such as Numi, Traditional Medicinals, and Pukka Herbs) represent the safest commercially available choice. Unbleached paper avoids both the microplastic content of nylon/polypropylene mesh bags and the chlorine bleaching residues found in bright-white paper bags. Avoid all pyramid-style bags unless the brand explicitly states the material is plant-based PLA (polylactic acid) — and even PLA bags have been shown to release some particles at boiling temperatures in certain studies, though at levels far lower than nylon or polypropylene.
Several major mainstream brands use plastic in their tea bags. PG Tips pyramid bags are made from polypropylene mesh — confirmed by the company. Tetley uses polypropylene heat-sealing on some of their paper bag lines, though they have announced transition plans. Certain Lipton product lines use nylon mesh pyramid bags. Twinings has partially transitioned but still uses plastic in some pyramid varieties. Bigelow standard bags use a paper-plastic composite heat-seal. The safest approach is to assume any pyramid or "silken" bag contains plastic unless the brand explicitly states otherwise, and to choose flat paper bags from organic-focused brands or switch entirely to loose-leaf tea.
A non heatseal tea bag is one that is closed without a polypropylene adhesive strip. Standard "heatseal" bags use a thin line of thermoplastic (usually polypropylene) melted along the top edge to seal the bag shut — this plastic seal sits directly in the boiling water and sheds microplastics. Non heatseal alternatives include bags stapled shut (a small metal staple holding the string to the folded paper), crimped-and-folded closures, and glued closures using non-plastic adhesives. Brands like Numi and Traditional Medicinals use unbleached abaca or Manila hemp paper with a non heatseal staple-and-fold construction. When assessing a bag, look for a flat paper bag with a visible string-and-tag attached by staple or thread, a brown (unbleached) color, and a fold at the top rather than a shiny sealed strip. If you see a metallic sheen or feel a slightly different texture at the bag's top seam, that's typically polypropylene adhesive — the heat seal you want to avoid.
The best-documented unbleached tea bag brands that are genuinely plastic-free include: Numi Organic Tea (abaca fiber bags, non heatseal, USDA Organic); Traditional Medicinals (unbleached Manila hemp paper bags, string-and-tag, no plastic adhesive, certified organic since the 1970s); Yogi Tea (unbleached paper bags with string and tag, USDA Organic lines); and Pukka Herbs (plant-based cellulose Soilon bags — not bleached paper but a corn-starch-derived material, certified organic). "Unbleached" means the brown-tinted color is natural wood pulp or plant fiber — no chlorine bleach treatment that can leave organochlorine residues. All four brands are widely available on Amazon and most natural-food grocery stores. If a brand markets "eco" bags but they're bright white, the bags have been bleached; if they're pyramid-shaped, assume synthetic polymer mesh unless the brand specifically says otherwise.
Yes — the idea that plastic-free tea bags sacrifice quality is a myth. Paper bags fell out of fashion partly because mainstream brands adopted nylon pyramid bags for marketing reasons (the expanded brewing chamber looks premium), not because paper brews inferior tea. Numi's abaca-fiber bags steep full-leaf and flowering teas that outperform many pyramid brands on flavor. Traditional Medicinals' Manila hemp bags have been brewed for decades with consistent quality. Pukka's cellulose bags offer excellent infusion of their finely-blended organic herbs. If flavor is the top priority, loose-leaf tea in a stainless steel infuser delivers the best cup of any option — no bag material at all, full-leaf expansion, and zero microplastic exposure. The switch from nylon pyramid bags to unbleached paper or loose-leaf does not require a taste compromise; it usually involves an improvement in tea quality once you move to brands that prioritize ingredient sourcing alongside material safety.
The best tea bag brands without microplastics — verified by material disclosure and organic certification — are: Numi Organic Tea (abaca fiber, no plastic, USDA Organic; wide black, green, herbal, and turmeric range); Traditional Medicinals (unbleached Manila hemp paper, no plastic heat-seal, the gold standard for herbal teas like Throat Coat and Gypsy Cold Care); Yogi Tea (unbleached paper, most widely available in conventional grocery stores, USDA Organic lines); and Pukka Herbs (plant-based Soilon cellulose bags, Soil Association certified organic, best price-per-bag value). For a completely plastic-free solution with no bag material at all, any brand's loose-leaf tea steeped in an 18/8 stainless steel infuser eliminates the tea bag problem entirely. Brands to avoid include PG Tips pyramid, standard Tetley, standard Lipton, and Twinings pyramid lines — all confirmed or likely to use polypropylene or nylon in their bags.
Sources & Further Reading
- Hernandez, L.M. et al. (2019). "Plastic Teabags Release Billions of Microparticles and Nanoparticles into Tea." Environmental Science & Technology, 53(21), 12300–12310. McGill University.
- Ragusa, A. et al. (2021). "Plasticenta: First Evidence of Microplastics in Human Placenta." Environment International, 146, 106274.
- Marfella, R. et al. (2024). "Microplastics and Nanoplastics in Atheromas and Cardiovascular Events." New England Journal of Medicine, 390(10), 900–910.
- Leslie, H.A. et al. (2022). "Discovery and Quantification of Plastic Particle Pollution in Human Blood." Environment International, 163, 107199.
- Qian, N. et al. (2024). "Rapid single-particle chemical imaging of nanoplastics by SRS microscopy." PNAS, 121(3). Columbia University bottled water study.