BACKGROUND: The use of protein hydrolyzates in food and feed ingredients is a growing area of interest. The present study was conducted aiming to determine the standardized ileal digestibility (SID) and to evaluate protein quality of porcine and bovine hydrolyzates. The SID values were determined in pigs and these values were used to calculate digestible indispensable amino acid score (DIAAS) values. RESULTS: The SID of crude protein of hydrolyzates of porcine plasma, bovine muscle, bovine collagen, porcine heart and porcine muscle was 0.81, 0.84, 0.79, 0.79 and 0.91, respectively. Based on the DIAAS, hydrolyzates of porcine plasma and porcine heart (DIAAS = 87 and 76) are considered as good quality protein sources for younger children. For older children, adolescents and adults, the hydrolyzates of bovine muscle and porcine heart (DIAAS = 81 and 87) are considered as good quality protein sources and the hydrolyzate of porcine plasma (DIAAS = 102) is considered as a high quality protein source. CONCLUSION: DIAAS values indicate that the porcine and bovine hydrolyzates tested in the present study have low and medium to high protein values and also that the protein products can be included in human nutrition.
BACKGROUND: The use of protein hydrolyzates in food and feed ingredients is a growing area of interest. The present study was conducted aiming to determine the standardized ileal digestibility (SID) and to evaluate protein quality of porcine and bovine hydrolyzates. The SID values were determined in pigs and these values were used to calculate digestible indispensable amino acid score (DIAAS) values. RESULTS: The SID of crude protein of hydrolyzates of porcine plasma, bovine muscle, bovine collagen, porcine heart and porcine muscle was 0.81, 0.84, 0.79, 0.79 and 0.91, respectively. Based on the DIAAS, hydrolyzates of porcine plasma and porcine heart (DIAAS = 87 and 76) are considered as good quality protein sources for younger children. For older children, adolescents and adults, the hydrolyzates of bovine muscle and porcine heart (DIAAS = 81 and 87) are considered as good quality protein sources and the hydrolyzate of porcine plasma (DIAAS = 102) is considered as a high quality protein source. CONCLUSION: DIAAS values indicate that the porcine and bovine hydrolyzates tested in the present study have low and medium to high protein values and also that the protein products can be included in human nutrition.