A new report has put food packaging under sharper scrutiny by estimating that around 1,000 tonnes of microplastics may enter food each year from plastic packaging. The findings, reported in the From Pack to Plate study by EarthAction and rePurpose Global, highlight a direct exposure pathway that connects packaging design, material choice and everyday consumer ingestion.

According to the report, consumers may ingest around 130 mg of micro- and nanoplastics annually through food and beverages, with high-use consumers potentially exposed to more than one gram per year. While packaging is not the largest source of microplastic pollution by mass when compared with tyre wear, textiles or paints, it is especially relevant because it can create direct contact between particles and food.

For the packaging industry, the message is significant: microplastic release is not only an environmental issue after disposal. It may also be a product safety and material performance issue during storage, transport, retail and consumer use.

Packaging-related microplastic exposure is predictable, which means it can also be reduced through better design, testing and material choices.

The report identifies PET bottles as one of the major contributors, representing approximately one third of packaging-related exposure. Rigid PET food packaging and flexible polyethylene packaging are also highlighted as important sources. Multilayer packaging accounts for a smaller share, but still raises concerns because complex material structures can create additional recycling and end-of-life challenges.

Design details also matter. Caps, closures and multi-component structures can generate particles through friction, especially when packaging is opened, closed, squeezed or transported. Use conditions are another important factor. Sunlight and UV exposure can increase particle release substantially, while hot filling, heating or microwaving may weaken plastic structures and increase the migration of particles.

• Material selection influences how many particles may be released.
• Caps and closures can contribute through friction and repeated movement.
• UV exposure may accelerate degradation and particle formation.
• Heating conditions can increase stress on plastic packaging structures.

The health dimension adds urgency to the discussion. The report suggests that for every 100 to 200 mg of micro- and nanoplastics ingested, around 50 mg of associated chemicals may also be transferred. These can include substances of concern such as endocrine-disrupting or carcinogenic compounds. Many particles are small enough to cross biological barriers, making the issue relevant for regulators, food brands and packaging suppliers.

Current food packaging regulation focuses heavily on chemical migration, but particle release is still less developed as a safety consideration. This gap may become increasingly important as scientific understanding improves and consumers demand greater transparency around food-contact materials. Packaging designed for circularity must also be assessed for how it behaves during real use, not only for recyclability after disposal.

For converters and brand owners, the practical response begins upstream. Materials should be tested under realistic conditions, including exposure to light, heat, mechanical stress and repeated opening. Packaging components that create friction should be redesigned where possible, and supply chains should limit unnecessary UV exposure during storage and distribution.

This does not mean plastic food packaging will disappear. Plastics still deliver important benefits in food safety, shelf-life extension, lightweight logistics and waste reduction. However, the report reinforces the need to evaluate plastics more carefully across their full life cycle and to develop packaging that releases fewer particles while maintaining performance.

For Packnode readers, the key takeaway is that microplastic reduction may become a new frontier in sustainable packaging. The industry has already been challenged to improve recyclability, reduce virgin material use and lower carbon impact. The next challenge may be to prove that packaging is not only recyclable and efficient, but also safer in terms of particle release during everyday use.

The path forward will require collaboration between material producers, packaging designers, food companies, testing laboratories and policymakers. If particle release becomes part of packaging safety assessment, companies that act early with better design, realistic testing and transparent claims will be better prepared for future regulation and consumer expectations.