Recent findings indicate that popular cat foods in the U.S. contain detectable levels of heavy metals and other contaminants. A report by the Clean Label Project revealed these results, examining the potential risks to cats who consume these products daily. Representatives from the pet food industry, however, challenge the study’s methodology and assure consumers of the safety of their products.
Study Details
The report by the Clean Label Project tested 100 cat food products from 62 brands. Results showed lead present in 99% of samples, cadmium in 96%, and arsenic in 94%. Additionally, mercury, glyphosate, and plastic-related chemicals were detected. Notably, dry cat food had about three times more lead compared to wet or air-dried options. Fish- and seafood-based foods showed higher mercury and cadmium levels than those with other proteins. Three brands—BIXBI, Freshpet, and Smalls—were noted for meeting the Clean Label Project’s certification.
Industry Response
Industry groups and nutrition experts scrutinized the findings, pointing out that the report compared contaminant levels across products without evaluating potential health risks. A single batch per product was tested, which report authors acknowledge as a limitation. Pet Food Institute CEO Elise Fennig highlighted that the study used the Clean Label Project’s own “purity standard” instead of recognized benchmarks. She emphasized the lack of evidence showing contaminants at harmful levels for cats.
“Pet owners should trust that commercially available products adhere to strict safety and quality standards,” Fennig said.
Questions were raised about transparency in the relationship between the Clean Label Project and the brands getting certifications. The Pet Food Institute pointed out key limitations, stressing the need for more data before drawing conclusions about product safety.
Criticisms of the Study
Jennifer Larsen, a veterinary nutrition professor, called the report’s approach “fearmongering.” She emphasized the difference between detecting a substance and determining it as harmful. Larsen criticized the measurement of total mercury, advocating for methylmercury measurement, which is more toxic. She urged for peer review and transparency regarding the study’s data and author disclosures.
“We need to be cautious about conclusions drawn from incomplete data,” Larsen added.
Larsen suggested future research to explore risks related to chronic, low-level exposures.
Regulatory Differences Between U.S. and Europe
U.S. and European cat food standards differ significantly. Europe’s tighter and central regulations contrast with the more flexible U.S. system. The FDA regulates U.S. cat food, while the Association of American Feed Control Officials sets nutritional standards. In Europe, cat food is regulated under EU law with guidelines from the European Pet Food Industry Federation. This results in potential formula differences between regions. For instance, ethoxyquin, a preservative suspended in Europe since 2017, is still used in U.S. pet foods to prevent rancidity.
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