News 522 views last update:6 Aug 2012

Not enough lysine in commercial cat food

New Zealand scientists say commercial cat food might give domestic cats much less lysine than thought.

Shane Rutherfurd and colleagues at Massey University used a new method to analyze the amounts of lysine actually available for nourishment in 20 commercial cat foods. Lysine is an "essential" amino acid important in a range of body functions, including absorption of calcium and building muscle protein.

The researchers found older, traditional tests significantly overestimate the amount of nutritionally available lysine. "This overestimate ranged from 41% to 143% for the moist food and from 18% to 90% for the dry foods," the scientists said.

The study appears in the May 2 issue of the American Chemical Society's Journal of Agricultural and Food Chemistry.

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Massey University

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