Foodborne pathogens are responsible for approximately 420,000 deaths and 600 million cases of illness each year. Despite these staggering figures, current food safety regulations often rely on ultra-sensitive tests that prioritize pathogen detection over assessing the relative threat to consumers. This approach may inadvertently lead to increased food waste, higher costs, and limited public health benefits, according to a study led by Cornell researchers.
The study, published in Frontiers in Science on March 16, argues for a shift from “zero-detection” expectations to risk-based food safety regulations. These regulations should focus on setting evidence-based targets that ensure food is sufficiently safe, rather than aiming for an unattainable zero risk. Martin Wiedmann, Ph.D. ’97, the Gellert Family Professor in Food Safety in the College of Agriculture and Life Sciences (CALS), emphasized the need for a balanced approach, stating, “Although the public expects food to be completely safe, there will always be some risk of foodborne illness.”
The Problem with Ultra-Sensitive Testing
Current hazard-based rules treat any pathogen detection as unacceptable, regardless of the dose, exposure, or a food’s capacity to support microbial growth. This can lead to alarmist responses that are disproportionate to the actual risk posed to consumers. Ultra-sensitive tests often flag minuscule amounts of microorganisms or toxins that are unlikely to cause disease, resulting in the disposal of otherwise safe food.
Such practices not only reduce the availability of nutritious food products but also lead to unnecessary recalls, which can erode consumer trust. Recalls may occur out of an abundance of caution when bacteria similar to disease-causing organisms are found in fields or processing facilities.
Environmental and Economic Implications
Beyond testing, additional protective measures can inadvertently increase energy use, costs, and diminish nutritional quality. Practices such as colder storage temperatures, additional packaging, and more aggressive heat treatments are crucial safeguards but should be calibrated to achieve an acceptable level of risk while considering environmental, economic, and nutritional trade-offs.
“There’s well-established evidence that focusing on end-product testing is generally ineffective to ensure safety,” said co-author Sriya Sunil ’19, Ph.D. ’24, a postdoctoral researcher in food science (CALS).
Overemphasis on end-product testing may distract from other food safety measures that could provide greater public health benefits. The study advocates for a shift from hazard-based approaches to targeted risk-based approaches, which consider the likelihood of human illness when implementing food safety measures.
Aligning with Broader Societal Goals
Even current risk-based approaches may fall short in addressing broader societal goals, including sustainability. For instance, lowering refrigeration temperatures can minimize safety risks but may increase energy use and greenhouse gas emissions. A truly risk-based approach should align with broader societal priorities around sustainable, nutritious, and secure food systems.
To establish acceptable or tolerable risks, computational tools could be employed to incorporate vast amounts of information about food safety risks, as well as associated environmental and economic costs. Consistent food safety standards that align with societal priorities are particularly valuable for global trade purposes but require balancing competing interests.
“Specialists across social sciences, economics, and life sciences must work together to establish values that align with consumers’ priorities,” Wiedmann said.
Looking Ahead: Cooperation and Innovation
The development of risk-based systems will necessitate broader cooperation among academic, government, and industry stakeholders. This collaborative approach is essential to establish food safety standards that reflect consumer priorities and align with global trade requirements.
The study by Cornell researchers highlights the need for a paradigm shift in food safety regulations, advocating for a more nuanced approach that balances risk, environmental impact, and public health benefits. As the global food system continues to evolve, such insights are crucial for ensuring that safety measures are both effective and sustainable.
