Journal
BRITISH JOURNAL OF NUTRITION
Volume 106, Issue -, Pages S162-S165Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1017/S0007114511000535
Keywords
Tryptophan; Food intake; Ghrelin; Dogs
Categories
Funding
- internal departmental funds (Animal and Food Science)
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Tryptophan, a precursor of important molecules such as serotonin, melatonin and niacin, is an essential amino acid for dogs. In pigs, tryptophan supplementation has been shown to induce a significant increase in food intake. The aim of the present study was to assess whether long-term tryptophan supplementation increases voluntary food intake in dogs and to observe whether this was accompanied by a change in serum ghrelin. In the present study, sixteen adult Beagle dogs were used, with four male and four female dogs fed diets supplemented with tryptophan (1g/dog per d) during 81d (Trp) and four male and four female dogs that were not supplemented (control). A voluntary food intake test was performed during 5 d following the supplementation period. The Trp group tended to show a higher food intake during the voluntary food intake test (58.0 (SE 5.37) v. 77.5 (SE 3.65) g/kg metabolic weight per d; P=0.074). No significant differences were found for serum ghrelin concentrations.
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