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Fish-flavored cat food could contribute to feline hyperthyroidism, study suggests

Date:
January 6, 2016
Source:
American Chemical Society
Summary:
Over the past three decades, the number of cats diagnosed with hyperthyroidism has increased. According to research reports, many factors such as exposure to flame retardants could be responsible, and now a new study points in another direction. It suggests that fish-flavored cat food could be among the culprits.
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Over the past three decades, the number of cats diagnosed with hyperthyroidism has increased. According to research reports, many factors such as exposure to flame retardants could be responsible, and now a new study in ACS' journal Environmental Science & Technology points in another direction. It suggests that fish-flavored cat food could be among the culprits.

Hyperthyroidism is a hormonal disorder that can cause weight loss, hyperactivity, aggression, vomiting and other symptoms in cats. No one knows for sure what causes it. But some studies have suggested a connection between environmental pollutants including polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs), which have been banned in many countries because they could potentially harm humans. Previous studies have detected these compounds and their byproducts in blood samples from cats. But the byproducts, which can also have toxic effects, could come naturally from other sources such as fish, a common ingredient in cat food. Hazuki Mizukawa, Kei Nomiyama and colleagues wanted to investigate whether cats were getting exposed from their fish-flavored food.

The researchers tested cat food and blood samples from cats. They also simulated how a feline's body would process various PCB- and PBDE-related compounds. Based on their results, the team concluded that the byproducts that were detected at high levels in cats' blood samples likely came from fish-flavored food and not exposure to PCBs or PBDEs. The researchers say further work is needed to clarify whether these metabolites specifically contribute to hyperthyroidism.

The authors acknowledge funding from the Japan Society for the Promotion of Science.


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Materials provided by American Chemical Society. Note: Content may be edited for style and length.


Journal Reference:

  1. Hazuki Mizukawa, Kei Nomiyama, Susumu Nakatsu, Hisato Iwata, Jean Yoo, Akira Kubota, Miyuki Yamamoto, Mayumi Ishizuka, Yoshinori Ikenaka, Shouta M. M. Nakayama, Tatsuya Kunisue, Shinsuke Tanabe. Organohalogen Compounds in Pet Dog and Cat: Do Pets Biotransform Natural Brominated Products in Food to Harmful Hydroxlated Substances? Environmental Science & Technology, 2016; 50 (1): 444 DOI: 10.1021/acs.est.5b04216

Cite This Page:

American Chemical Society. "Fish-flavored cat food could contribute to feline hyperthyroidism, study suggests." ScienceDaily. ScienceDaily, 6 January 2016. <www.sciencedaily.com/releases/2016/01/160106110703.htm>.
American Chemical Society. (2016, January 6). Fish-flavored cat food could contribute to feline hyperthyroidism, study suggests. ScienceDaily. Retrieved September 26, 2016 from www.sciencedaily.com/releases/2016/01/160106110703.htm
American Chemical Society. "Fish-flavored cat food could contribute to feline hyperthyroidism, study suggests." ScienceDaily. www.sciencedaily.com/releases/2016/01/160106110703.htm (accessed September 26, 2016).