Canned food does carry plastic — but not from the food. Studies that put canned fish under a microscope found microplastic particles inside it, and, more importantly, nearly every food can is lined with a thin plastic (epoxy) coating that migrates into what's inside. A landmark 2011 Harvard study found that eating canned soup for five days raised people's urinary BPA by more than tenfold versus fresh soup — direct proof the lining sheds into the food. The important caveat: these studies measured presence and migration, not proven human harm, and the better-studied concern is the bisphenol chemicals from the lining, not the particles.
A can of beans or tomatoes seems like the last place to worry about plastic — it's metal on the outside and food on the inside. But run through what's actually touching your food, and canned goods turn out to be one of the more plastic-intensive things in the pantry. The plastic isn't the beans; it's the lining sprayed inside the can and the machinery the food travels through, and both have been measured. The same surprise has shown up across foods people assume are clean, from salt to rice to seafood.
This guide walks through exactly what the studies found — the microplastic particles measured in canned fish, and the harder-hitting evidence that the can's own lining leaches into the food — how the plastic gets in (again, not the crop), whether the amounts are worth worrying about (the honest answer is calmer than the headlines, and points at the lining chemicals first), and the handful of changes that actually cut what you consume.
The bottom line up front: the plastic in canned food comes from the can — the epoxy lining sprayed inside nearly every can, plus particles from the canning line — not the beans, tomatoes or fish, so the fixes are about the packaging and the water you cook with. Rinse canned beans and vegetables, never store leftovers in the open can (move them to glass), favor glass-jarred or fresh-frozen where you can, and above all filter the water you cook and dilute canned foods with. For the bigger picture, see our ranking of which foods have the most microplastics, why tap water is a top source, and the room-by-room kitchen plastic detox guide.
Do studies find microplastics in canned food?
Yes — and the evidence comes in two forms. The first is direct particle counts in canned fish. A 2020 study in Marine Pollution Bulletin examined canned tuna and found roughly 128 microplastic particles across 50 samples, with polyethylene terephthalate (PET), polystyrene and polypropylene the dominant polymers — the plastics of processing and packaging, not anything native to a fish. A 2023 survey of canned fish sold in Türkiye reached the same conclusion, detecting microplastics across brands.
The second, and arguably stronger, line of evidence is about the can itself. Nearly every food can is lined on the inside with a thin plastic epoxy coating, and that lining doesn't stay put. In a 2011 Harvard study published in JAMA, volunteers who ate a serving of canned soup daily for five days had urinary BPA levels more than ten times higher than when they ate the same soup made fresh — direct, in-people proof that the plastic lining migrates into the food. Different labs, different foods, same conclusion: the plastic in a can comes from the can.
Where do the microplastics in canned food come from?
From the can and the canning line, almost never the food. Start with the lining: because bare steel or aluminum would react with acidic, salty, watery food, almost every food can is coated on the inside with a plastic film — historically a BPA-based epoxy resin, now often a BPA-alternative like BPS, BPF, polyester or acrylic. That film is in constant contact with the food for the can's entire shelf life, and it migrates — faster when the food is acidic (tomatoes, citrus), when the can is heated, and the longer it sits.
Layered on top of that are the microplastic particles from processing. Researchers who traced the plastic in canned fish point to the salt added during canning, the water and cleaning steps, and the canning machinery itself — the same industrial sources that seed plastic into other processed staples. What contributes essentially nothing is the food: there's no pathway for a bean or a sardine to manufacture plastic. The table below sorts out where the plastic in a typical can actually originates.
| Source | What Happens | Contribution |
|---|---|---|
| The epoxy can lining | The plastic film coating the inside of the can migrates into the food, faster with acidic or heated contents and long storage | Major — the biggest lever |
| Acidic & watery foods | Tomatoes, citrus and brine pull more from the lining than dry contents do | Major — drives lining migration |
| The canning process | Salt, processing water, cleaning steps and canning machinery shed microplastic particles into the food | Moderate to major |
| Heat & long storage | Warmth and months on a shelf increase how much migrates from the lining | Moderate |
| The food itself (beans, tomatoes, fish) | No pathway shown; the plastic isn't made by the crop or the fish | Negligible |
How much microplastic is in canned food?
Enough to measure in study after study — but the number depends on which plastic you mean. For the particles, the canned-tuna study counted about 128 microplastics across 50 samples, and other canned-fish surveys land in a similar range; counts vary by species, brand and lab method. For the lining, the clearest yardstick is chemical rather than particle: the 2011 canned-soup study measured a roughly 1,200% jump in urinary BPA after five days, which tells you the coating migrates in amounts the body registers within days.
The honest headline is that the numbers bounce around, and no single figure covers "canned food" — a dry canned chickpea and a can of acidic tomato sauce are different exposures. What doesn't vary is the direction: across independent teams and both kinds of measurement, the plastic is there and it's coming from the packaging. Put it in scale, too — canned food is usually an occasional part of a diet, so for most people it's a smaller, more controllable source than the water they drink all day.
"Canned food doesn't get its plastic from the beans or the fish — it gets it from the plastic lining sprayed inside the can and the line it's processed on. Rinse it, move leftovers to glass, and above all filter the water you cook with, and you change what ends up on your plate."
Is BPA-free canned food actually safer?
It's a step, not a solution. "BPA-free" means the manufacturer swapped bisphenol A out of the epoxy lining for something else — often a close chemical cousin like BPS or BPF, or a polyester or acrylic coating. But it's still a plastic film lining the can, it still contacts and migrates into the food, and the replacements are less studied, not proven safer; some early research suggests the bisphenol substitutes carry similar hormone activity. The label solves the specific molecule people learned to fear, not the underlying fact that food is sitting against plastic.
A BPA-free can also does nothing about the microplastic particles that come from the canning process rather than the lining. So treat "BPA-free" as a mild plus, not a green light — the same way we've argued that "BPA-free" doesn't automatically mean safe elsewhere. The dependable moves aren't about hunting for the perfect can; they're about getting food off the lining and filtering your water.
Are the microplastics in canned food dangerous?
Here's where honesty matters. The particle-count studies were designed to measure how much plastic is present and what polymers it is — not to test what those particles do once they're inside a person. On the narrow question of harm from the microplastics in canned fish, the research doesn't have a verdict yet, and no one should read one into it.
The lining chemicals are a different and better-studied story. Bisphenols like BPA are endocrine disruptors — they interact with the body's hormone system — which is exactly why the canned-soup study drew so much attention and why many people limit canned foods. A 2019 analysis in Environmental Science & Technology estimated the average person already swallows tens of thousands of microplastic particles a year from food and drink combined, with water a large driver; canned food is one contributor within that total. What we know more broadly is that microplastics are increasingly detected throughout the human body — in blood, organs, and even the brain — so trimming avoidable exposure is sensible even while the particle-harm question stays open.
You don't need a microplastics scare to make canned food an occasional rather than a default choice — the lining chemicals are reason enough on their own. And the particles that come with it are a rounding error next to the water you drink all day. Rinse and decant what you do use, then spend the rest of your effort on the bigger sources in our kitchen plastic detox guide.
How do you reduce the microplastics in canned food?
You can't filter plastic out of a can, so the leverage is around it: what you buy, how you handle it, and the water you cook it in. A few moves do most of the work. Rinse canned beans and vegetables in a colander, which washes away some of the plastic and bisphenols that leached into the packing liquid. Never store leftovers in the open can — once it's opened the metal and lining are exposed, so decant into glass. And favor glass jars, cartons, or fresh and frozen versions of the same food where they exist, since they skip the epoxy lining entirely.
The highest-leverage move, as with every food on this site, is the water. Filter the water you cook and dilute canned foods with — the soup you thin, the pot you simmer beans in, the water behind everything you drink all day — because that water is usually the larger and more constant microplastic source, and the one you can genuinely clean. A pitcher that carries a specific microplastics claim — certified under NSF/ANSI 401, or a rated membrane pore size — cuts particle counts sharply; see our full guide to the best water filter pitchers for microplastics and the broader water filter roundup — or, if you’d rather filter at the tap than pour a pitcher, the best faucet water filters. Store your staples in glass instead of their packaging, and you've closed off the sources you actually control. The picks below are the simplest, longest-lasting ways to do all of that.
Fix the sources that actually matter
The plastic that comes with canned food is the can's lining and the water you cook it in — and the lining chemicals are the bigger health story. Start where it counts: filter your tap water and move your food off plastic and into glass.
The swaps that cut the most plastic around canned food
You can't buy "microplastic-free canned food," and you can't strain the plastic out of a can. So instead of padding this out with products that don't exist, here are the real, currently-sold tools that cut the plastic around canned food — certified water filters for the water you cook and dilute it with, plus glass and platinum-silicone storage to get opened cans and leftovers off metal and lining. Prices and availability change, so check current listings.
1. Epic Pure Water Filter Pitcher — Best Overall for Microplastics
Best Overall
Reviewers point to published independent lab data and a filter rated around 150 gallons, far longer than a Brita, as the reasons they trust it, and several describe the slow, deliberate drip as reassuring rather than annoying. The honest downsides: owners report the filtration is genuinely slow and not the pick if you want a glass of water in a hurry, and third-party complaints mention cracked plastic, flip-top lids that stick, and water that spills or leaks from the lid when you pour a full pitcher.
The clearest evidence on this list: Epic posts its independent lab results publicly, so you can see the 99.9% microplastic-removal data instead of trusting a slogan on the box.
Why it's safe: The hollow fiber membrane physically blocks microplastic particles down to ~1 micron, while the carbon stage handles chlorine, lead, and PFAS — all in a BPA-free Tritan body.
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The water you cook canned food in — the soup you thin, the pot you simmer beans or lentils in, the glass you fill all day — is usually a bigger microplastic source than the can itself, and it's the input you control most tightly, which makes a good filter the highest-leverage swap on this list. The Epic Pure is the clearest choice: its dual-stage design uses a hollow fiber membrane as the primary microplastic barrier, and Epic publishes the independent lab results to back the 99.9% removal claim — transparency most competitors don't match.
2. Waterdrop Chubby 10-Cup Pitcher — Best Filter Life
Best Filter Life
Owners like the look and the long 200-gallon filter life, and roughly 80 percent of reviews land positive, with the common praise being clean-tasting water at a low cost per gallon. The honest gripes: several owners warn the handle can feel loose or strain under a full pitcher, so they lift with two hands; some report the pour spills if you tip too fast; and the change-filter indicator light draws complaints for not lighting or not staying lit.
A membrane blocks particles by pore size rather than by claim list, and its 200-gallon filter runs about 4 to 5 months — the lowest ongoing cost on the list.
Why it's safe: A hollow fiber membrane is a physical barrier to particles, while the carbon composite handles chlorine, heavy metals, and PFAS — all in a BPA/BPS-free body.
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If canned soups and beans are a weeknight staple, you'll run water through a filter constantly — so filter life matters, and the Waterdrop Chubby leads on it: a hollow fiber membrane on Waterdrop's own published lab data, plus 200 gallons per filter (about 4–5 months for most households). The "filter while you pour" design works just like a familiar counter pitcher, but with a membrane that's actually tested for microplastics.
3. Aquagear Water Filter Pitcher — Best Value
Best Value
Owners choose it for broad contaminant removal and clean taste, and some lab testing found it did not clog. The honest downsides: the most repeated complaint is slow filtration, described by one reviewer as a mixed bag between people waiting minutes and people waiting hours, and it can worsen as the filter ages; and the design draws gripes, with the pour-spout cover popping out and spraying water and a lid that fits poorly and can pop off mid-pour.
Change the filter half as often as most pitchers — 150 gallons per cartridge means fewer replacements, lower annual cost, and less to remember.
Why it's safe: A 5-stage filter with a sub-micron membrane stage captures microplastics, lead, fluoride, and chlorine, in a BPA-free body with USA-made filter media.
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The Aquagear costs more upfront but its 150-gallon filter life means lower annual replacement costs than most competitors, and the pitcher body is guaranteed for life. It uses a 5-stage filter with a sub-micron membrane stage that targets microplastics, heavy metals, and fluoride — a good fit for households that don't want to track filter changes constantly.
4. ZeroWater 10-Cup Pitcher with TDS Meter — Best for Cooking Water
Best for Cooking Water
ZeroWater’s 5-stage cartridge finishes with an ion-exchange resin that pulls dissolved solids out of the water, reaching a 0 ppm TDS reading no ordinary carbon pitcher can match — the cleanest possible base for anything you cook or dilute a can into. The included meter is genuinely useful: it shows exactly when the resin is spent, because ion-exchange capacity runs out rather than gradually fading.
That’s also the catch, and we won’t hide it: capacity is short. In hard or high-TDS water a filter can be spent in 25–40 gallons, and the honest fix is to replace on the meter reading, not a calendar. Stripping everything can leave the water tasting flat. But as the cheapest no-install way to get water to a true zero, with a meter proving it, ZeroWater earns its spot.
The signature draw is the included meter reading 000, and owners write “We love it” about getting the dissolved-solids count to zero. But stripping minerals has a cost: the water can taste “flat” and slightly acidic, and the filter life is short at roughly 25 to 40 gallons, so a family swaps filters every one to three weeks. Some also report the lid falls off when pouring, with filter cost the number-one long-term complaint.
The cheapest no-install way to pull dissolved solids to zero — a 5-stage ion-exchange pitcher with a TDS meter that proves when the filter is spent.
Why it's safe: The 5-stage cartridge combines carbon and ion-exchange resin in a BPA-free body, taking the water you cook and dilute with down to a 0 ppm reading — just replace it on the meter, not the calendar.
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Because canned soups and sauces are mostly water — thinned, simmered, and diluted before they reach the bowl — the water you add matters as much as the can it came from. ZeroWater’s ion-exchange stage takes that water to a measured zero, so the can is the only variable left. Just watch the meter, because the trade for that purity is a shorter filter life.
5. Glasslock Oven Safe Container Set (3-Pack) — Best Glass Storage
Best Glass Storage
Longtime owners like that the glass bodies are oven-, microwave-, and freezer-safe and that the snap-lock lids seal tight. The honest downsides run through the lids, not the glass: reviewers report cracked lids, snapped locking tabs, and mold building up in the rubber gaskets if they are not dried well. Some buyers also received sets with a locking piece missing, and several flag slow, hard-to-reach customer service when they needed a replacement part.
Three stackable glass containers in one box — enough to store a week of leftovers and prepped ingredients without a single plastic tub.
Why it's safe: Your food sits on inert tempered glass, not plastic — so warm, acidic, watery foods can’t leach or pick up shed particles. The BPA-free lids seal with a food-grade silicone gasket that only touches the rim.
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This is the single most direct fix for canned food itself: never leave leftovers in an opened can — tip them into glass and the food stops sitting against exposed metal and lining. The same set stores beans, sauces, and other staples, and handles everyday leftovers — reheat with the lids off so warm food never sits against plastic. At roughly ten dollars per container, it's also the cheapest way to retire your plastic food tubs in one purchase.
6. Stasher Reusable Silicone Bag Starter Kit — Best Silicone Bag
Best Silicone Bag
For freezing leftovers, portioning batch-cooked beans, or anything you’d reach for a plastic bag — Stasher’s platinum-cured silicone is the upgrade: sturdier than any disposable bag and free of the chemicals that migrate from plastic. The patented Pinch-Loc seal is genuinely airtight and leakproof, so it holds moisture in without drips.
It’s freezer safe to -70°F and goes straight to the microwave or a 425°F oven. The starter kit covers the everyday sizes — sandwich, snack, and stand-up half-gallon — so you can retire a whole box of single-use bags in one purchase.
Owners like that the platinum silicone bags go from freezer to microwave and replace throwaway plastic for years. The honest gripes: smell and stain retention come up often, with reviewers noting garlic and strong odors linger even after washing; the pinch-lock seal can be fiddly to open and close; and the seams are slow to dry, which can invite mildew if you do not air them out.
Store leftover beans, soups, and batch-cooked meals in airtight silicone instead of leak-prone plastic — then thaw and reheat in the same bag, no transfer needed.
Why it's safe: Platinum-cured silicone — the highest-purity, chemically inert grade — with no plastic, PVC, BPA, lead, latex, phthalates, or PFAS.
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Leftover beans, soups, and batch-cooked meals are exactly the things people freeze in flimsy plastic bags. A multi-size silicone kit replaces the whole box at once, seals airtight, and goes from freezer to microwave in the same bag. For the full lineup, see our guide to the best silicone food storage bags.
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The honest verdict
Does canned food have microplastics? Yes — studies found microplastic particles in canned fish (about 128 across 50 canned-tuna samples, dominated by PET, polystyrene and polypropylene), and, more tellingly, the plastic epoxy lining inside nearly every food can migrates into the food: a 2011 Harvard study measured a roughly 1,200% jump in people's urinary BPA after five days of canned soup. But the crucial detail is the source — the plastic comes from the can's lining and the canning line, not the beans, tomatoes or fish, and how much migrates depends on the food, the acidity, the heat, and how long it sat. Those studies measured presence and migration, not proven harm. So the accurate takeaway is proportion, not alarm — and the bisphenol chemicals from the lining, not the particles, are the part the evidence is most certain about.
The practical response is easy, because the plastic that comes with canned food is mostly plastic you can route around. Rinse canned beans and vegetables. Never leave leftovers in the open can — move them to glass. Favor glass jars, cartons, or fresh and frozen where you can. And above all, filter the water you cook and dilute canned foods with, since that water is usually the bigger and more constant microplastic source and the one you can genuinely make cleaner. You don't need a plastic scare to make canned food the occasional choice rather than the default — the lining chemicals already are the reason.
Cut the plastic that actually adds up
The plastic in a can is small next to the water you drink all day. A certified filter and a couple of glass jars make filtered water and glass-stored food the easy default.
Frequently Asked Questions
Yes. Studies that examined canned fish found microplastic particles inside the food — one analysis of canned tuna detected around 128 microplastics across 50 samples, dominated by PET, polystyrene and polypropylene. And nearly every food can is lined on the inside with a thin plastic (epoxy) coating that migrates into the food: a landmark 2011 Harvard study found that eating canned soup for five days raised people's urinary BPA more than tenfold versus fresh soup. So canned food carries two plastic exposures — microplastic particles and bisphenol chemicals shed from the lining.
Mostly the can and the canning line, not the crop. Almost every food can is lined on the inside with a plastic epoxy coating so the metal doesn't react with the food, and that lining slowly migrates into what's inside — faster with acidic foods like tomatoes, with heat, and with long storage. On top of that, researchers trace the microplastic particles in canned fish to the salt, the processing water, the cleaning steps and the canning machinery itself. The beans, tomatoes or fish are not the plastic source; the packaging and the line are.
There is no single number, and it depends on the food. In canned fish, one study of canned tuna counted about 128 microplastic particles across 50 samples, and another survey found microplastics in canned fish across brands sold in Türkiye. For the lining, the clearest measure is chemical: eating canned soup daily for five days raised urinary BPA by roughly 1,200% in a 2011 Harvard study. Acidic, watery and long-stored foods generally pick up more than dry ones.
Not necessarily. “BPA-free” means the can lining swapped bisphenol A for a cousin like BPS or BPF, or a polyester or acrylic resin — but it is still a plastic coating that can migrate into the food, and the substitutes are less studied, not proven safer. A BPA-free label also says nothing about the microplastic particles that come from the canning process. It is a step, but it does not make a can plastic-free.
You can't strain plastic out of a can, but you can cut your exposure. Rinse canned beans and vegetables in a colander to wash off some of what leached into the liquid, never store leftovers in the open can (decant into glass), and lean on glass-jarred, carton, or fresh and frozen versions where you can. Above all, filter the water you cook and dilute canned foods with — for most people the water is the larger, more constant microplastic source and the one you can actually clean.
The health risk from the microplastic particles themselves is not established — the food studies measured how much plastic is present, not what it does inside a person. The bisphenol chemicals from the lining are better studied and are endocrine disruptors, which is why many people limit canned foods. Microplastics are increasingly detected throughout the human body, so trimming avoidable exposure is sensible. Canned food is one source among many, and filtered water plus glass storage removes more plastic than any single swap.
Sources
- Akhbarizadeh R, Dobaradaran S, Torkmahalleh MA, et al. "Abundance, composition, and potential intake of microplastics in canned fish." Marine Pollution Bulletin, 2020;157:111355. (Detected roughly 128 microplastic particles across 50 canned-tuna samples; polyethylene terephthalate, polystyrene and polypropylene dominant, with salt, fish, cleaning and the canning process named as sources.)
- "Microplastic contamination in canned fish sold in Türkiye." 2023. (Detected microplastics in canned fish across brands, adding independent confirmation that particles reach the food inside the can.)
- Carwile JL, Ye X, Zhou X, Calafat AM, Michels KB. "Canned Soup Consumption and Urinary Bisphenol A Concentrations." JAMA, 2011;306(20):2218–2220. (Eating canned soup daily for five days raised urinary BPA from a geometric mean of 1.1 µg/L to 20.8 µg/L — roughly a 1,200% increase — direct evidence the can lining migrates into food.)
- Cox KD, Covernton GA, Davies HL, et al. "Human Consumption of Microplastics." Environmental Science & Technology, 2019;53(12):7068–7074. (Estimated tens of thousands of microplastic particles consumed per person per year from food and drink combined.)