Microplastics have become one of the most debated issues in food and beverage packaging, but NAPCOR is calling for stronger scientific standards before broad conclusions are drawn about PET packaging. Laura Stewart, Executive Director at NAPCOR, argues that the public discussion around plastic particles must be guided by validated methods, careful interpretation and a clear distinction between detection and proven health risk.

Defined as plastic particles smaller than five millimetres, microplastics are now widely discussed by consumers, regulators and food companies. Headlines frequently report particles in water, food and human tissues, creating concern about everyday exposure. Yet the science behind these findings is still developing, and results can vary significantly depending on how samples are collected, processed and analysed.

The central problem is the lack of standardised methods. Researchers around the world use different definitions, contamination controls, particle-size thresholds, sampling procedures and analytical tools. This makes it difficult to compare studies or determine whether reported findings reflect real exposure patterns, laboratory contamination or limitations in detection technology.

For packaging policy, the question is not whether microplastics deserve attention, but whether decisions are being made from evidence that is consistent, comparable and scientifically validated.

NAPCOR points to recent high-profile claims about microplastics in the human body as an example of why caution is needed. Some alarming reports have attracted global attention, only for later scientific critiques to question whether the methods used could reliably distinguish plastics from natural biological materials or rule out contamination. In a field this sensitive, preliminary findings can quickly become accepted as fact before they have been fully tested.

This matters strongly for food and beverage packaging, where consumer confidence depends on accurate information. Packaging materials are used every day to protect food from contamination, extend shelf life, support transport and reduce waste. If public debate treats all plastics as identical, it can obscure important differences in chemistry, regulation, recycling performance and safety history.

Polyethylene terephthalate, or PET, is one of the most extensively evaluated food-contact plastics in use today. Identified by the #1 resin code, PET has been used for decades in bottles, trays and other food and drink packaging. It remains approved by major regulatory agencies including the U.S. Food and Drug Administration, the European Food Safety Authority and Health Canada.

NAPCOR stresses that PET should not be grouped casually with every plastic material. Virgin PET does not contain BPA, phthalates or PFAS, and both virgin and recycled PET must undergo review before being authorised for food-contact applications. This regulatory background is important when assessing packaging risk and communicating with consumers.

• Standardised science: common methods are needed to compare microplastics research accurately.
• Material distinction: PET has a specific chemistry, regulatory history and safety profile.
• Circular pathway: PET supports bottle-to-bottle recycling when collection and processing systems are in place.

The debate also requires a clear understanding of risk. Detecting particles is not the same as proving harm. Leading health authorities have generally stated that evidence of adverse effects from current human exposure levels remains limited and inconclusive. This does not mean research should stop; it means conclusions should be proportionate to the strength of the evidence.

PET also plays an important role in packaging circularity. It is among the most widely recycled plastics globally and one of the few packaging materials with an established route for true bottle-to-bottle recycling. When collected and processed properly, a used PET bottle can be converted into new food-grade packaging while maintaining key performance characteristics.

For the packaging industry, the message is twofold. First, microplastics research must continue, because understanding exposure and potential health effects is important. Second, policy and consumer communication should avoid oversimplification. Better science will help identify genuine risks, improve material management and support practical solutions rather than fear-driven reactions.

NAPCOR’s position reinforces the need for collaboration between industry, regulators, academic researchers and public health experts. Standard operating procedures, contamination controls and cross-validated analytical techniques will be essential to build confidence in future findings. Without that foundation, microplastics headlines may raise concern without providing clear guidance for action.

The future of PET packaging will depend on both scientific credibility and circular performance. Standardised research can help consumers understand real risks, while stronger recycling systems can reduce plastic leakage and improve resource efficiency. In the microplastics debate, evidence, transparency and responsible packaging design must move forward together.

Image concept: a PET bottle recycling and laboratory testing scene showing clear beverage bottles, microplastics analysis equipment, contamination-control samples and a circular bottle-to-bottle recycling flow diagram.