ã€Chinese Packaging Network News】 Recently, American scientist Joe Adentoniji raised a serious warning: "The chemicals used in food packaging, storage, and handling could have long-term negative effects on human health."
In a paper published in the journal *Epidemiology and Public Health*, Adentoniji highlighted that numerous potentially harmful chemicals are present in materials that come into contact with food. These include the inner coatings of cans, the film laminations of folding cartons, and even the sealing covers of glass bottles. Even small amounts of these chemicals can leach into food, especially when exposed to heat, stored for long periods, or placed in certain types of packaging. The higher the temperature and the longer the storage time, the more likely it is for these chemicals to migrate into the food.
Chemicals on Food Packaging
Although some chemicals are approved as indirect food additives and are considered safe, others—such as endocrine disruptors—can negatively impact fertility, increase the risk of endometriosis, and even raise the likelihood of cancer. According to Adentoniji, over 4,000 different chemicals have been identified on food packaging materials. In the U.S., asbestos is sometimes used as an indirect additive in rubber, while formaldehyde, a known carcinogen, is commonly found in PET plastic bottles at low levels. Additionally, melamine-formaldehyde utensils can also release formaldehyde into food. Considering how many carbonated drinks are consumed daily in the U.S., the potential risks from these packaging materials should not be ignored.
Chemical Gains and Losses
Some scientists argue that consumer behavior and preferences play a key role in understanding the use of packaging materials throughout the food supply chain. Catherine Eitman, a researcher from the University of Newcastle in Australia, noted, "While chemical use has brought convenience in food production, growing evidence suggests that chemical pollution from packaging can affect human health. However, we still lack a full understanding of how these chemicals impact the body, which diseases they may cause, and who might be most vulnerable. Before concluding whether a chemical is dangerous, we must also evaluate the benefits it provides. It’s not always black and white."
Not all experts agree with Adentoniji's concerns. Ian Musgrave, a pharmacologist from the University of Adelaide, believes the dangers of formaldehyde in food packaging have been overstated. He argues, "Many foods naturally contain formaldehyde. To break down the formaldehyde in 100 grams of apples, you would need at least 20 liters of water from a PET bottle. If that were true, fresh fruits and vegetables should also carry cancer warnings. While we shouldn’t ignore the possibility of contamination from packaging, the risk is extremely low. This study focuses too much on the micro-leakage of formaldehyde, which can unnecessarily alarm people."
Packaging Industry's Path to Change
Professor Ian Rey, Emeritus Professor at the University of Melbourne, stated that although the dangers of chemicals have been recognized for years, research on the long-term effects of low-dose exposure remains limited. However, many manufacturers are already responding to consumer pressure by switching to safer packaging materials before stricter regulations are enforced. This proactive approach helps them avoid potential crises and maintain brand trust.
Currently, bisphenol A and phthalates are being phased out from many product packages. As scientific debates continue, the industry will likely keep evolving to meet new safety standards. We'll have to wait and see what the final conclusions of these studies reveal.
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