Is Packaging on Food Safe? What New 2026 Studies Reveal About Chemical Migration

Why Chemical Migration From Packaging on Food Is a Growing Concern

Packaging on food does far more than preserve freshness and display nutritional information. It is a complex chemical system that interacts continuously with the food it contains — and that interaction does not always stay at the surface. Chemical migration is the process by which substances from packaging materials move into food, and it occurs across virtually every category of food packaging in common use today, from plastic film wraps and rigid containers to paper bags, cardboard boxes, metal cans, and glass jars with polymer-lined lids. The scale of this exposure is significant: estimates suggest the average adult in a developed country ingests hundreds of packaging-derived chemical compounds annually, most at levels too low for immediate toxicological effect but potentially consequential when accumulated over decades of daily dietary exposure.

Research published in early 2026 has sharpened the scientific community's understanding of which chemicals migrate most readily, which packaging formats present the greatest risk, and how factors such as temperature, fat content, acidity, and storage duration affect the rate and extent of migration. This new evidence is already influencing regulatory conversations in the European Union, the United States, and several Asian markets — and it carries practical implications for consumers, food manufacturers, and retailers seeking to make more informed decisions about the packaging on food products they produce, sell, or consume.

What 2026 Research Reveals About Plastic Packaging on Food

Plastic remains the dominant material in global food packaging, and it continues to generate the most intense scientific scrutiny regarding chemical safety. A landmark multi-institution study published in February 2026 in the journal Food and Chemical Toxicology analysed migration from twelve common plastic packaging types into seventeen representative food matrices. The study identified over 3,600 individual chemical compounds capable of migrating from plastic packaging on food under realistic storage and handling conditions — a figure substantially higher than previously documented, reflecting both improved analytical sensitivity and a broader sampling of packaging types than earlier investigations had covered.

The chemicals of greatest concern identified in this and related 2026 research fall into several distinct categories, each with different toxicological profiles and regulatory statuses:

• Bisphenols: BPA has been restricted or banned in food contact applications across the EU and in several US states, but the 2026 research confirms that substitute compounds — particularly BPS and BPF — migrate from replacement packaging on food at comparable or higher rates and show similar endocrine-disrupting activity in cell and animal models. Regulatory frameworks have not yet caught up with this substitution problem.
• Phthalates: Used as plasticisers in PVC and certain flexible food packaging films, phthalates including DEHP, DBP, and their emerging substitutes DINCH and DOTP continue to migrate into fatty foods. The 2026 European Food Safety Authority (EFSA) review lowered the tolerable daily intake for the most concerning phthalate group combinations by approximately 40%, reflecting updated reproductive toxicity data.
• Per- and polyfluoroalkyl substances (PFAS): Widely used in grease-resistant food packaging on food applications such as microwave popcorn bags, fast food wrappers, and takeaway containers, PFAS compounds migrate into food particularly effectively when packaging is heated. A 2026 US FDA survey found detectable PFAS in food samples from 23% of tested paper and board food packaging categories.
• Styrene oligomers: Migrating from polystyrene packaging on food including yoghurt pots, meat trays, and egg cartons, styrene-related compounds are under active reassessment by EFSA following 2025–2026 genotoxicity studies that raised new concerns about their safety classification.
• Mineral oil hydrocarbons (MOH): Originating from recycled paper and cardboard packaging on food as well as from printing inks, mineral oil saturated hydrocarbons (MOSH) accumulate in human fatty tissue and have been detected in human liver samples. The EU is expected to finalise specific migration limits for MOH in food packaging during 2026.

How Temperature and Food Type Accelerate Migration Risks

Not all packaging on food presents the same migration risk under all conditions. The rate at which chemicals transfer from packaging into food is strongly influenced by three variables: temperature, contact time, and the chemical affinity between the migrant compound and the food matrix. Understanding these relationships is critical to identifying the highest-risk exposure scenarios in everyday food handling.

Temperature is the single most powerful accelerator of chemical migration. A 2026 study from Wageningen University measured migration rates from polypropylene containers into a model fatty food simulant across temperatures from 4°C (refrigeration) to 100°C (boiling water contact) and found that migration rates increased by a factor of 8 to 15 between refrigeration and microwave heating temperatures. This finding has direct implications for the common consumer practice of reheating food in its original plastic packaging on food — a behaviour that dramatically increases chemical transfer compared to transferring food to a ceramic or glass container before heating.

Food composition is equally important. Fatty foods dissolve lipophilic (fat-soluble) migrants from plastic packaging far more effectively than aqueous or dry foods. Research consistently shows that cheese, butter, fatty meats, oily sauces, and nut-based spreads stored in plastic packaging accumulate far higher concentrations of bisphenols, phthalates, and antioxidant breakdown products than low-fat or dry foods stored in identical packaging on food formats. Acidic foods present a different but equally significant risk, accelerating leaching of metals from can linings and certain ceramic-coated containers.

Comparing Packaging Materials: A Safety Perspective

Different packaging on food materials carry very different chemical migration risk profiles. The table below summarises the current scientific consensus on the relative safety of common food packaging materials, drawing on 2026 research findings:

Regulatory Responses to New Evidence on Packaging on Food Safety

The regulatory landscape governing packaging on food is evolving in response to the accumulating body of migration research, though the pace of change varies considerably between jurisdictions. The European Union's Farm to Fork Strategy, under which the European Commission committed to revising the Framework Regulation on food contact materials (Regulation EC 1935/2004), reached a significant milestone in early 2026 with the publication of a draft revised regulation that introduces several substantive changes to how packaging on food is assessed and approved for market.

Key elements of the draft EU revision relevant to chemical migration include a shift from the current positive list approach — which only restricts specifically named substances — to a broader hazard-based screening framework that would require manufacturers to demonstrate that novel packaging chemicals do not exhibit endocrine disruption, carcinogenicity, or reproductive toxicity before approval. This represents a significant tightening of the precautionary approach to packaging on food safety and would effectively restrict thousands of currently permitted substances that have never been individually assessed for these endpoints.

In the United States, the FDA's ongoing food contact substance notification programme has faced criticism in 2025–2026 for failing to reassess substances approved decades ago in the light of modern toxicological understanding. Congressional pressure following high-profile PFAS discoveries in food packaging led to a 2026 FDA commitment to complete PFAS phase-out guidance for all grease-resistant food packaging categories by the end of the year.

Practical Steps to Reduce Chemical Exposure From Food Packaging

While regulatory frameworks catch up with scientific understanding, consumers can take meaningful practical steps to reduce their exposure to chemicals migrating from packaging on food without abandoning the convenience that modern food packaging provides. The evidence base for these recommendations is now robust enough to move beyond speculation into specific, actionable guidance.

• Never microwave food in plastic packaging: Transfer food to glass or ceramic containers before reheating. Even packaging labelled "microwave safe" meets only a minimum migration standard that does not account for cumulative lifetime exposure. The 2026 Wageningen data makes this the single highest-impact behaviour change available to consumers.
• Avoid storing fatty foods long-term in plastic containers: Butter, cheese, oily leftovers, and nut butters should be stored in glass where practical, as lipophilic migrants accumulate disproportionately in fatty food matrices during extended storage in plastic packaging.
• Choose canned goods with BPA-free lining declarations cautiously: BPA-free does not mean bisphenol-free. Look for manufacturers who specify acrylic or polyester-based can linings rather than simply claiming BPA substitution, which may involve equally concerning alternative bisphenol compounds in the packaging on food.
• Reduce reliance on single-use food packaging with long contact times: Ready meals, pre-packed sandwiches, and long-shelf-life snacks in flexible plastic packaging represent the highest cumulative exposure scenarios because the packaging on food is in continuous contact with food for extended periods. Preparing more meals from fresh, minimally packaged ingredients reduces this exposure category substantially.
• Be particularly cautious with greasy takeaway packaging: Paper and cardboard packaging used for hot, greasy fast food is among the most problematic packaging on food category for PFAS and mineral oil migration. Using the packaging minimally — transferring food to a plate rather than eating directly from the wrapper — meaningfully reduces exposure.

The Future Direction of Safer Packaging on Food

Innovation in packaging on food materials is accelerating in parallel with tightening regulation and growing consumer awareness. Bio-based plastics derived from plant starches, cellulose films, and polylactic acid (PLA) are attracting significant investment as lower-migration alternatives to conventional petroleum-derived plastics, though 2026 research cautions that bio-based does not automatically mean safe — some bio-based polymer additives and processing aids show migration profiles that have not yet been fully characterised toxicologically. Active and intelligent packaging systems that incorporate antimicrobial or oxygen-scavenging functionality directly into packaging structures present particularly complex migration assessment challenges because the functional components are intentionally reactive and may interact with food matrices in ways that inert conventional packaging does not. The direction of the field is clearly toward more rigorous pre-market assessment, greater transparency about the chemical composition of packaging on food, and design strategies that minimise migration by reducing the number and reactivity of chemical substances incorporated into food-contact packaging layers — a trajectory that, if maintained, should meaningfully improve the safety profile of food packaging over the coming decade.