Microplastics in Food Packaging: The Hidden Problem
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What are microplastics and how do they enter food systems? Learn how plastic packaging contributes to microplastics exposure and why new materials are emerging.
A new conversation around plastic
For years, the global conversation about plastic has focused on waste and pollution: plastic in oceans, landfills, and natural ecosystems. But a new dimension of the issue is emerging.
Researchers are increasingly detecting microplastics. tiny fragments of plastic, in the environment, food systems, and even human tissues. While the science is still evolving, this growing body of research is shifting the conversation within packaging and materials innovation.
Plastic is no longer just a waste problem. It may also be a materials exposure question.
This topic is explored in the documentary The Plastic Detox, which investigates how plastics interact with our food systems, bodies and environment.
Watch the documentary here →
What are microplastics?
Microplastics are very small pieces of plastic, typically defined as plastic particles smaller than 5 millimetres. They can originate in two main ways:
Primary microplastics.
Tiny plastic particles intentionally produced at small sizes (for example in industrial materials or synthetic fibres).
Secondary microplastics
Fragments that form when larger plastic items break down over time due to sunlight, heat, friction or environmental exposure.
Why do microplastics persist and where are they found?
Because plastics are extremely durable materials, they do not biodegrade easily. Instead, they gradually fragment into smaller and smaller pieces.
Over time, these particles spread through the natural environment and can now be detected across water, soil, air and food systems.
Scientists are currently studying how these particles move through ecosystems and where people may encounter them in everyday life.
What the research says about microplastics
Scientists have detected microplastics in a growing number of places, including: Human blood | Lung tissue | The placenta | Drinking water | Seafood and salt
Research in this field is still evolving, but these findings highlight how widely plastic particles have spread through modern environments.
Sources: Vrije Universiteit Amsterdam study (2022). microplastics detected in human blood
Are microplastics found in food?
A growing number of studies have detected microplastics in a range of food and drink products, including seafood, salt, bottled water and other packaged foods.
Researchers are still working to understand how these particles enter food systems, and how different materials may contribute to exposure.
Can plastic packaging release particles?
Under certain conditions, plastic packaging can shed microscopic fragments or additives over time.Factors such as heat, friction, storage time and repeated use can influence how materials behave.
This is an active area of scientific research, and methods for measuring microplastics are still developing.What is becoming clearer is that the materials used in packaging play an important role in the wider food system.
Are microplastics harmful to human health?
Scientists are actively researching the potential health implications of microplastics.Some studies have detected microplastic particles in human blood, lung tissue and the placenta, but the long-term health impacts are still being investigated.
At this stage, researchers emphasise that more studies are needed to understand exposure levels and biological effects.What the science does highlight is the importance of reducing unnecessary plastic exposure where alternatives exist.
Why is packaging part of the conversation?
Food packaging is one of the largest uses of single-use plastic globally. Much of this packaging is designed for short-term use but made from materials that persist for centuries.
As awareness of microplastics grows, companies across the food industry are exploring new materials that perform like plastic, without creating plastic waste or fragments.
Why material innovation matters
At Notpla, we believe the solution starts with rethinking materials entirely. Rather than redesigning plastic, we work with naturally derived materials like seaweed to create packaging that performs like plastic during use, but behaves very differently after disposal.
Our coatings and food packaging materials are designed to eliminate plastic from food contact materials, break down naturally without forming microplastics, and work within existing foodservice systems.
As research continues to evolve, one thing is becoming increasingly clear: material choices matter. Finding alternatives to conventional plastics is not just about reducing waste, it’s about building better material systems for the future of food packaging.
For years plastic was framed purely as a waste problem. But as the science around microplastics develops, it’s becoming clear the materials we use every day deserve much closer scrutiny.
→ Pierre Paslier, Co-Founder & Co-CEO of Notpla
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Better for you. Better for the planet.
Notpla coated food packaging replaces conventional plastic linings with seaweed-based coatings, creating packaging that works with nature rather than against it. No plastic. No persistent microplastics.
Just materials designed to disappear naturally.
FAQs
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Scientists believe microplastics can enter food systems through multiple pathways. Plastic particles can be present in water, soil and air, which means they may be absorbed or carried into crops, seafood and processed foods. Researchers are continuing to study how materials used across supply chains, including packaging, may contribute to this wider exposure.
Interest in microplastics research has grown rapidly over the last decade as scientists develop better tools to detect extremely small particles. These studies are helping researchers understand where microplastics are found in the environment, how they move through ecosystems, and where people may encounter them in everyday life.
Food packaging is one of the largest uses of single-use plastic globally. As awareness of microplastics from plastic packaging grows, the packaging industry is increasingly exploring materials that can deliver the same performance without relying on conventional plastics.
The materials used in food packaging determine how packaging behaves during use and after disposal. Conventional plastics are extremely durable and can fragment into smaller particles over time. As awareness of microplastics grows, companies are increasingly exploring materials that can deliver the performance of plastic without creating persistent plastic fragments.
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