Quick Answer
The main advantages of food packaging are protection from contamination and tampering, a longer shelf life that cuts food waste, the nutrition and allergen information the law requires it to carry, and lower prices with year-round access to foods that are only in season for a few weeks. The main disadvantages are chemical migration from the container into the food, the volume of waste it creates (containers and packaging were 28.1 percent of all US municipal solid waste in the EPA’s most recent published figures), some nutrient loss during the processing that packaging makes possible, and the false confidence a sealed pack can create about safety. The balance is not the same for every material, and most of the health complaints aimed at “packaging” are really complaints about the recipe inside it.
Almost everything most of us eat arrives inside something. Cans, jars, cartons, pouches, films and paperboard sit between the food and the world, and they do real work: they keep pathogens out, slow spoilage, carry legal information and make food cheap enough to buy. They also shed trace amounts of themselves into what they hold, and they are thrown away within days. This guide separates what packaging genuinely does well from what it genuinely costs, using regulator and peer-reviewed sources rather than the recycled claims that dominate this topic.
First: food packaging is not the same thing as packaged food
Almost every article on this subject blurs these two, and the confusion is why so much of the advice is useless. Packaging is the container. Packaged food is the product inside it. They fail in different ways, they are regulated under different rules, and you fix them with different decisions.
| Question | Food packaging | Packaged food |
|---|---|---|
| What is it | The container and any coating or liner | The formulated product inside |
| Examples | Glass jar, steel can, PET bottle, paperboard carton, laminated pouch | Canned beans, crisps, ready meal, soft drink |
| Main health question | What migrates out of the container into the food | How much sodium, added sugar, saturated fat and which additives |
| How it is regulated | Food-contact substance rules and migration limits | Nutrition labelling and food composition standards |
| How you change it | Choose a different material or a different storage habit | Choose a different product or a reformulated version |
Keep this split in mind for the rest of the page. “Canned soup is high in salt” is a packaged-food problem, and switching to a glass jar does nothing about it. “Trace chemicals leach from a can lining” is a packaging problem, and buying a lower-sodium soup does nothing about it.
5 advantages of food packaging
1. It is a physical barrier against contamination and tampering
A sealed container keeps out dust, insects, moisture, oxygen and the bacteria that travel on all of them. Retort processing and aseptic filling go further, heating the product to destroy microorganisms and then sealing it so nothing can get back in. Tamper-evident closures make interference visible before you eat. This is the single strongest argument for packaging and it is not seriously disputed.
What packaging does not do is make food immune to illness, and that distinction matters enough that it has its own section further down this page.
2. It extends shelf life, which cuts food waste
Oxygen, light and moisture drive most spoilage. Barrier packaging slows all three. A tomato picked in August and canned that week is still usable the following summer; the same tomato in a bowl is compost in ten days. That shelf life is also an environmental argument in packaging’s favour, because throwing away food wastes the water, land, fertiliser, transport and refrigeration that went into producing it, all of which usually outweigh the footprint of the wrapper. Packaging has a genuine environmental cost, covered below, but a fair comparison sets that cost against the waste it prevents rather than treating it as pure loss.
3. It carries the information the law requires
Unpackaged food tells you almost nothing. A package is the legal surface for the ingredient list, allergen declaration, nutrition panel, batch code and date marking. For anyone with coeliac disease, a nut allergy or a sodium restriction, that printed surface is the difference between a safe purchase and a guess. Batch codes are also what makes a targeted recall possible at all: without them, a contamination problem means pulling everything instead of one lot. If you want to get more from that panel, see our guide on how to read nutrition labels.
4. It locks nutrients in at the point of processing
This is where the usual story gets reversed. Canned and frozen produce is normally processed within hours of harvest, at peak ripeness, while “fresh” produce can spend a week in transit and another in your fridge losing nutrients the whole time.
A review of the fresh, frozen and canned literature published in the Journal of the Science of Food and Agriculture found the pattern clearly: the initial heat treatment costs water-soluble and oxygen-sensitive nutrients such as vitamin C and the B vitamins, but those nutrients are then relatively stable in the can because there is no oxygen inside it. Frozen products lose less up front, because blanching is brief, then lose more in storage to oxidation. Minerals and fibre are essentially unaffected by canning, and carotenoids are often higher in the processed product because heat breaks down cell walls and makes them easier to extract. Canned tomatoes are the standard example: more available lycopene than the fresh fruit, not less.
The honest summary is that the can pays once, at processing, and then charges very little. Your fridge charges a little every day.
5. It lowers cost and widens access
Packaging allows bulk processing, efficient stacking, long-distance transport without refrigeration and storage without a cold chain. That is why a can of chickpeas or tinned sardines is one of the cheapest sources of protein and fibre on the shelf, why it is available in places with no fresh produce market, and why it keeps in a cupboard with no electricity. For households on a tight budget, or anyone without reliable refrigeration, shelf-stable packaged staples are frequently the most nutritious option actually available, not a compromise.
5 disadvantages of food packaging
1. Chemicals migrate from the container into the food
Any material in contact with food transfers small, measurable amounts of itself into that food. Regulators accept this and set migration limits rather than pretending it does not happen. Two substances dominate the public conversation, and both are widely described incorrectly.
Bisphenol A (BPA). BPA is not a preservative and is not added to food. It is a building block used to make polycarbonate plastic and the epoxy resins that line metal cans so the food never touches bare metal. It has been used in food packaging since the 1960s, and it reaches food by migrating out of that lining or that plastic.
Regulators now disagree sharply about how much is acceptable, and this is the most useful thing to know about BPA in 2026:
- In April 2023 the European Food Safety Authority re-evaluated BPA and set a tolerable daily intake of 0.2 nanograms per kilogram of body weight per day, drastically lower than the temporary 4 micrograms per kilogram it had used since 2015. On EFSA’s own assessment, typical European consumers of every age group exceed that new figure by two to three orders of magnitude.
- The European Commission adopted a ban on BPA in food contact materials in December 2024, in force from January 2025 with a phase-out period for industry.
- The US position is different. The FDA’s published perspective is that BPA is safe at the levels currently occurring in foods, and that assessment page has not been substantively updated since 2014.
- Germany’s risk assessment body reached a third figure, 0.2 micrograms per kilogram of body weight per day, a thousand times higher than EFSA’s.
One point worth making because it is repeated incorrectly so often: the FDA’s 2012 and 2013 amendments removing BPA-based materials from baby bottles, sippy cups and infant formula packaging were made on the grounds that industry had already abandoned those uses. They were not safety bans, and the FDA said so explicitly at the time.
PFAS. Per- and polyfluoroalkyl substances were used as grease-proofing agents on paper and paperboard: fast-food wrappers, microwave popcorn bags, takeaway cartons. The FDA identified this as the main route of dietary PFAS exposure from authorised food-contact uses, obtained voluntary phase-out commitments from manufacturers in 2020, and announced in February 2024 that these substances were no longer being sold for food-contact use in the US. In January 2025 it formally determined that 35 related food-contact notifications were no longer effective, with a compliance date of 30 June 2025 for existing paper packaging stock. Note the nature of this: it was a market withdrawal negotiated with industry, not a comprehensive federal ban, and a dozen or so US states have written their own PFAS packaging laws in the meantime.
The practical point across both cases is that migration rises with heat, fat content, acidity and storage time. Those are the four variables you can actually control, which is what the final section of this page is about.
2. It is a large and short-lived share of household waste
The EPA defines containers and packaging as products discarded in the same year the goods they contain are bought, which is exactly what makes them a waste problem: a useful life measured in days and a disposal cost measured in decades. In the agency’s most recent published data, containers and packaging accounted for 82.2 million tons, or 28.1 percent of total US municipal solid waste generation – the largest single product category. Recovery varies enormously by material. Steel and corrugated board do well. Glass containers were recycled at roughly 31 percent, with over half landfilled. Multi-layer flexible pouches, which have the lowest material weight and the best transport footprint, are the hardest of all to recycle because the layers cannot readily be separated.
3. The processing packaging enables changes the recipe
This is the disadvantage most often misattributed to the container. Salt and sugar are added to many packaged products for flavour, texture and, historically, preservation. Diets high in sodium raise blood pressure, and diets high in free sugars are associated with poor cardiometabolic outcomes. Both are real concerns. Neither is caused by the jar.
Packaging is what makes highly formulated, shelf-stable products commercially possible, so it is fair to say it enabled the category. But the fix is the ingredient list, not the material. Two identical cans of beans, one at 500 mg sodium per serving and one at 100 mg, tell you the container was never the variable. If you want the evidence on the formulation side, see our piece on how ultra-processed foods affect inflammation.
4. Some nutrients are genuinely lost up front
Section 4 above gives packaging its due on nutrient retention, and this is the other half of that ledger. Blanching and thermal processing do destroy a meaningful share of vitamin C and several B vitamins before the container is ever sealed. Losses vary widely by commodity – small for some vegetables, very large for others – and averages above 60 percent for vitamin C have been reported across canned vegetables. Fat-soluble vitamins, minerals and fibre come through largely intact.
So the accurate statement is narrow: canning costs you specific heat-sensitive and water-soluble vitamins, then protects what remains. It does not “remove the nutrition” from food, and a diet built on canned vegetables and pulses is not nutritionally empty.
5. A sealed pack is not a guarantee of safety
Packaging reduces risk. It does not eliminate it, and believing otherwise is itself a hazard.
The airtight, low-oxygen environment inside a sealed container is exactly what Clostridium botulinum needs to grow if the heat process failed to destroy its spores. The CDC identifies improperly home-canned, preserved or fermented foods as the commonest source of foodborne botulism, with home-canned low-acid vegetables the leading cause of US outbreaks. Commercially packaged products are a rarer but documented source, and the agency also lists chopped garlic in oil, canned cheese sauce and carrot juice among identified vehicles. A 2024 outbreak in Fresno County, California, sickened eight people who ate home-preserved prickly pear cactus from a family gathering; six needed intensive care and two required mechanical ventilation.
Sealed and chilled packaged products carry their own risk. Listeria monocytogenes survives refrigeration, and multistate outbreaks traced to packaged ready-to-eat meals have caused deaths, with the greatest danger to people over 65, pregnant women and anyone immunocompromised. Recalls exist because packaged food makes people ill.
When to treat it as an emergency. Botulism toxin cannot be seen, smelled or tasted, and a small taste can be enough. Do not taste food to test it. Discard any can or jar that is bulging, leaking, badly dented along a seam, spurting on opening or smells wrong, without tasting it. Blurred or double vision, drooping eyelids, slurred speech, difficulty swallowing and descending muscle weakness after eating preserved food need emergency medical care immediately, not a wait-and-see.
Packaging materials compared
“Is packaging good or bad” is the wrong question, because the answer changes completely by material. This is the comparison most articles on this topic leave out.
| Material | Typical uses | Main advantage | Main trade-off |
|---|---|---|---|
| Glass jars and bottles | Sauces, preserves, baby food, drinks | Chemically inert, endlessly recyclable, no migration concern from the glass itself | Heavy to transport, breakable, modest recycling rates; the lid liner is not glass |
| Steel and tinplate cans | Vegetables, pulses, fish, soups | Very long ambient shelf life, high recycling recovery | Interior lining is the migration question, historically BPA-based epoxy |
| Aluminium cans | Drinks, some foods | Light, strong barrier, high recycling value | Also internally lined; high energy cost for primary production |
| PET bottles | Water, soft drinks, oils | Light, shatterproof, widely collected for recycling | Trace antimony from the polymerisation catalyst can migrate, more so at high storage temperatures |
| Polycarbonate (resin code 7) | Reusable hard clear bottles, older water cooler bottles | Durable and reusable | Made from BPA; migration increases with heat, age and scratching |
| Paper and paperboard | Cartons, wrappers, takeaway boxes | Renewable, recyclable, sometimes compostable | Needs a coating to hold grease or liquid; PFAS grease-proofing has been withdrawn from the US market |
| Flexible pouches and films | Snacks, coffee, ready meals, retort pouches | Lowest material weight, best transport footprint, excellent barrier | Multi-layer laminates are very difficult to recycle |
How to keep the advantages and cut the disadvantages
Abandoning packaged food is not realistic for most households and is not necessary. These are the changes that actually move the numbers.
- Do not heat food in packaging that is not labelled for it. Heat is the strongest driver of migration. Move food to glass or ceramic before microwaving, and do not reuse takeaway containers or single-use bottles for hot liquids.
- Move leftovers out of the opened can. Once opened, the lining is exposed to air and the contents to the metal. Transfer to a covered glass or food-grade container.
- Drain and rinse canned pulses – but know the real number. In a study of five canned bean varieties, draining removed about 36 percent of the sodium and draining plus rinsing removed about 41 percent on average. That 41 percent figure gets quoted for all canned food, which is wrong: USDA work on other canned vegetables found reductions closer to 9 to 23 percent. Rinsing also washes away some potassium, folate and other water-soluble nutrients along with the salt. For a bigger cut, buy the no-salt-added version.
- Read the panel, not the front of the pack. The claims on the front are marketing. The nutrition panel and ingredient list are regulated.
- Choose glass or stainless for anything you reuse, particularly for hot or acidic contents, rather than old polycarbonate bottles.
- Reject damaged containers on sight. Bulging, leaking, rusted through or dented on a seam means discard, without tasting.
- Match the format to how fast you will eat it. Buying a large pack that spoils half-used loses more, environmentally and financially, than the extra packaging on two smaller ones.
- If you preserve food at home, follow tested processing instructions. Low-acid foods need a pressure canner. A boiling water canner and a multi-cooker with a “canning” button will not reach the temperature required to destroy botulinum spores.
Frequently asked questions about food packaging
Protection from contamination, spoilage and tampering; a longer shelf life that reduces food waste; the ingredient, allergen, nutrition and batch information that the law requires the pack to carry; retention of minerals, fibre and carotenoids in produce processed within hours of harvest; and lower cost with year-round availability, including in places with no cold chain.
Trace chemical migration from the container into the food; a large volume of short-lived waste, since containers and packaging were 28.1 percent of US municipal solid waste generation in the EPA’s most recent published data; loss of heat-sensitive vitamins such as vitamin C during the processing packaging enables; and a false sense of safety, because sealed products still cause foodborne illness.
It depends where you are. The European Commission adopted a ban on BPA in food contact materials in December 2024, in force from January 2025 with a phase-out period, following EFSA’s 2023 decision to cut the tolerable daily intake to 0.2 nanograms per kilogram of body weight per day. In the United States, BPA remains authorised for food contact and the FDA’s published position is that it is safe at current levels, an assessment that has not been substantively updated since 2014. The FDA’s 2012 and 2013 removal of BPA from baby bottles, sippy cups and infant formula packaging was based on those uses being abandoned by industry, not on a safety finding.
No. Thermal processing does destroy a significant share of vitamin C and some B vitamins up front, and losses vary widely by vegetable. After that, the absence of oxygen inside a sealed can keeps what remains relatively stable for a year or more. Minerals and fibre are largely unaffected, and carotenoids are often more available in canned products than fresh ones because heat breaks down cell walls. Canned tomatoes deliver more usable lycopene than fresh tomatoes.
It removes some of it. In a study of five canned bean varieties, draining cut sodium by about 36 percent and draining plus rinsing cut it by about 41 percent on average. That figure is specific to beans in packing liquid: USDA work on other canned vegetables found reductions of roughly 9 to 23 percent. Rinsing also removes some potassium, folate and other water-soluble nutrients. Buying a no-salt-added version reduces sodium far more reliably than rinsing does.
Glass is the most chemically inert option and is the usual choice when migration is the main concern, though its lid liner is not glass and it is heavy to transport. Stainless steel is the equivalent for reusable containers. Among single-use formats, the trade-offs run in different directions: flexible pouches have the lowest material and transport footprint but are the hardest to recycle, while steel cans recycle well but rely on an internal lining. There is no single winner, which is why the right question is what you are optimising for.
Yes. The low-oxygen environment inside a sealed container is what Clostridium botulinum needs to grow if the heat process failed, and the CDC identifies improperly home-canned low-acid vegetables as the leading cause of US botulism outbreaks, with commercial products a rarer but documented source. Listeria survives refrigeration and has caused fatal multistate outbreaks traced to packaged ready-to-eat meals. Discard bulging, leaking or seam-dented cans without tasting them, and seek emergency care for blurred or double vision, drooping eyelids, slurred speech or difficulty swallowing after eating preserved food.
Related reading
- How to read nutrition labels to make smarter food choices
- How ultra-processed foods trigger inflammation
- The benefits of eating healthy foods
Sources
- US EPA, Containers and Packaging: Product-Specific Data
- European Food Safety Authority, Bisphenol A topic page and 2023 re-evaluation
- US FDA, Questions and Answers on Bisphenol A (BPA) Use in Food Contact Applications
- US FDA, PFAS Used in Grease-Proofing Agents for Food Packaging No Longer Being Sold in the US (February 2024)
- US FDA, Determination that 35 Food Contact Notifications Related to PFAS Are No Longer Effective (January 2025)
- US FDA, Authorized Uses of PFAS in Food Contact Applications
- Rickman, Barrett and Bruhn, Nutritional comparison of fresh, frozen and canned fruits and vegetables, Journal of the Science of Food and Agriculture
- Duyff, Mount and Jones, Sodium Reduction in Canned Beans After Draining and Rinsing, Journal of Culinary Science and Technology
- USDA Agricultural Research Service, Effect of draining and rinsing on the sodium and water-soluble vitamin content of canned vegetables
- CDC, Botulism and Home-Canned Foods
- CDC, Botulism Prevention
- CDC MMWR, Foodborne Botulism Outbreak After Consumption of Home-Canned Cactus, Fresno County, California, June 2024
- CDC Newsroom, Listeria outbreak linked to prepared meals
Last reviewed and rewritten September 2026. Regulatory positions on food contact materials are changing quickly, particularly on BPA and PFAS, and differ between the United States, the United Kingdom and the European Union. Check the regulator for your own jurisdiction before acting on any of the above. This article is general information, not medical advice, and is not a substitute for guidance from a qualified clinician or dietitian about your own diet or condition. Suspected botulism is a medical emergency. How we research and check this content is described in our editorial process and sources cited policy.
