Avaliação da qualidade protéica de dois suplementos alimentares em ratos Wistar
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Data
2006-03
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Resumo
The aim of this research was to evaluate the
protein quality of two dietary supplements - a protein
formulate (a product in test) and gelatin. Six groups of six
weanling male Wistar rats were fed with the different diets
for fourteen days: control (C 10 - casein), protein formulate
(FP 10 ) and gelatin (G 10 ) at 10 % protein level; mixtures with
casein and protein formulate (C 7 FP 3 ) or gelatin (C 7 G 3 ) (7:3
in protein base, respectively); and non-protein diet. The
protein formulate diets showed good quality protein,
according to Net Protein Ratio (NPR) and Net Protein
Utilization (NPU) indexes, without significant differences
between C 7 FP 3 and C 10 (NPR= 4.00 and 4.11, and NPU=
65% and 67%, respectively). The animals fed with gelatin
(G 10 ) and with non-protein diet lost body weight and their
liver weights were similar and lower than the liver weights
of the other groups of rats (p<0.05). The protein value of
the mixture casein-gelatin (C 7 G 3 ) was lower than the value
of casein (relative NPR= 77 %, p<0.05). Protein formulate
is a source of good quality protein and its use could be
indicated in special situations as a dietary supplement.
Gelatin, on its turn, could not be considered a nutritional
complement or supplement because it does not supply the
organism protein requirements and could impair the
biological availability of good quality proteins.
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Palavras-chave
Suplemento alimentar, Ratos, Suplemento nutricional, Disponibilidade biológica nutricional, Gelatina, Colágeno hidrolisado, Proteína, Food supplement, Nutritional supplement, Rats, Gelatin, Hydrolyzed collagen, Protein, Nutritional biological availability
Citação
NAVES, Maria Margareth Veloso; FERREIRA, Carla Cristina da Conceição; FREITAS, Cleire da Silva; SILVA, Maria Sebastiana. Avaliação da qualidade protéica de dois suplementos alimentares em ratos Wistar. Alimentos e Nutrição, Araquara, v. 17, n. 1, p. 35-42, jan./mar. 2006.