Dioxins and PCBs: A Persistent Health Challenge Hidden in Our Food Chain
Few environmental toxins spark as much concern—or debate—as dioxins and dioxin-like PCBs. These chlorine-based organic compounds, often produced unintentionally during industrial activities, have a frightening ability to linger in the environment for decades. Once released, they tend to accumulate in the fatty tissues of animals, making their way up the food chain and eventually landing on our plates. But here's where it gets both fascinating and alarming: even though their levels have dropped since the 1970s, largely thanks to stricter regulations and cleaner industrial practices, the risk they pose hasn’t entirely disappeared.
According to a new draft scientific opinion from experts at the European Food Safety Authority (EFSA), the issue remains a major public health concern. EFSA’s role in this context is to conduct extensive scientific assessments—evaluating everything from the safety of substances to the potential risks posed by environmental contaminants. Their latest review reaffirmed what earlier evaluations had already suspected: ongoing dietary exposure to dioxins and similar compounds continues to exceed safe levels for many individuals.
“We’ve updated the tolerable weekly intake (TWI) to just 0.6 picograms per kilogram of body weight,” explained Helle Knutsen, chair of EFSA’s Panel on Contaminants in the Food Chain. Translation? This is the estimated amount a person can safely consume every week throughout their life without suffering negative health effects. Yet EFSA’s current data show that most people in Europe—across all age groups—regularly exceed this limit. That revelation alone is likely to set off discussion among scientists, policymakers, and consumers alike.
So, why the renewed attention now? The European Commission asked EFSA to re-evaluate its 2018 opinion after the World Health Organization updated its Toxicity Equivalency Factors (TEFs) in 2022. These TEFs are internationally recognized benchmarks that help scientists compare how toxic different types of dioxins and PCBs are relative to the most harmful one, known as 2,3,7,8-TCDD. Updating these benchmarks inevitably reshapes how risk is assessed, prompting a reexamination of exposure data and safety recommendations.
And this is the part most people miss: risk assessment isn’t just an abstract scientific model. It’s a systematic process involving four crucial steps—identifying the hazard, characterizing its effects, assessing exposure levels, and ultimately determining the overall risk. Each step feeds into decisions that affect laws, food safety standards, and even the way industries operate.
Now, EFSA wants your input. The draft opinion is open for public consultation until 26 January 2026, and stakeholders, scientists, and members of the public are encouraged to contribute via EFSA’s official portal (https://connect.efsa.europa.eu/RM/s/consultations/publicconsultation2/a0lTk000006Nv0X/pc1724). This kind of transparency ensures that science, policy, and citizen voices all have a say in how food safety is managed.
Additionally, if you’d like to go deeper into the findings, EFSA will host a webinar on 11 December 2025, where its experts will unpack the draft conclusions and share insights into the risk assessment methods used. Registration details are available at (https://events.efsa.europa.eu/event/ar/978/webinar-on-dioxins-in-food-and-feed).
Here’s a question for you: should regulators impose stricter controls on industries to further reduce dioxin exposure, or have we already done enough? Drop your thoughts below—because how we balance environmental safety with industrial production will shape the future of our food and health.
