Peer-reviewed veterinary case report
How added sulfur amino acids affect nitrogen use in overweight dogs
By Bohaty, Robin E et al.·Published in Archives of animal nutrition·2012·Department of Animal and Food Sciences, United States·View original on PubMed →
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Original publication title: The effects of added sulphur amino acids, threonine and an ideal amino acid ratio on nitrogen metabolism in mature, overweight dogs.
- Species:
- dog
Plain-English summary
A group of eight overweight, mature female hounds were fed different diets to see how added amino acids affected their nitrogen metabolism. The diets included a control, one with an ideal amino acid profile, one with added sulphur amino acids, and one with both sulphur amino acids and threonine. While some diets led to higher nitrogen intake, there were no significant benefits in terms of protein digestion or overall health. The study concluded that adding these specific amino acids to the diets of mature dogs did not improve their nitrogen metabolism or health outcomes.
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Abstract
The objectives of this study were to investigate the effects of added essential amino acids in conjunction with a dietary lysine/MJ of 0.72 on nitrogen (N) metabolism in dogs. Treatments were; a control diet, a diet that provided an ideal amino acid profile (IAA), a diet with added total sulphur amino acids (TSAA), and a diet with added TSAA and threonine (TT). Diets were fed to eight overweight, mature, female hounds using a replicated 4 x 4 Latin Square design. Food intake was similar across treatments, however, food N intake was higher (p < 0.001) for TSAA than control, IAA or TT. Nitrogen absorbed was higher (p < 0.01) for TSAA than IAA and control. Urea N excretion was greater for control than TT (p < 0.05). Urine N excretion did not differ between diets. There were no differences in digestibility or N retention of diets. There were no differences in protein turnover, synthesis, or degradation. Blood metabolites were within normal ranges and did not differ due to dietary treatment. Based on the measurements made in this study, there is no benefit for added TSAA, TT or additional EAA in diets for mature dogs formulated to provide a 0.72 g lysine/MJ ME ratio.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/22397095/