TY - JOUR
T1 - Most meat products have digestible indispensable amino acid scores that are greater than 100, but processing may increase or reduce protein quality
AU - Bailey, Hannah M.
AU - Mathai, John K.
AU - Berg, Eric P.
AU - Stein, Hans H.
N1 - Publisher Copyright:
© The Authors 2020.
PY - 2020/7/14
Y1 - 2020/7/14
N2 - An experiment was conducted to test the hypothesis that meat products have digestible indispensable amino acid scores (DIAAS) >100 and that various processing methods will increase standardised ileal digestibility (SID) of amino acids (AA) and DIAAS. Nine ileal-cannulated gilts were randomly allotted to a 9 8 Youden square design with nine diets and eight 7-d periods. Values for SID of AA and DIAAS for two reference patterns were calculated for salami, bologna, beef jerky, raw ground beef, cooked ground beef and ribeye roast heated to 56, 64 or 72 C. The SID of most AA was not different among salami, bologna, beef jerky and cooked ground beef, but was less (P < 0-05) than the values for raw ground beef. The SID of AA for 56 C ribeye roast was not different from the values for raw ground beef and 72 C ribeye roast, but greater (P < 0-05) than those for 64 C ribeye roast. For older children, adolescents and adults, the DIAAS for all proteins, except cooked ground beef,were >100 and bologna and 64 C ribeye roast had the greatest (P < 0-05) DIAAS. The limiting AA for this age groupwere sulphur AA (beef jerky), leucine (bologna, raw ground beef and cooked ground beef) and valine (salami and the three ribeye roasts). In conclusion, meat products generally provide high-quality protein with DIAAS >100 regardless of processing. However, overcooking meat may reduce AA digestibility and DIAAS.
AB - An experiment was conducted to test the hypothesis that meat products have digestible indispensable amino acid scores (DIAAS) >100 and that various processing methods will increase standardised ileal digestibility (SID) of amino acids (AA) and DIAAS. Nine ileal-cannulated gilts were randomly allotted to a 9 8 Youden square design with nine diets and eight 7-d periods. Values for SID of AA and DIAAS for two reference patterns were calculated for salami, bologna, beef jerky, raw ground beef, cooked ground beef and ribeye roast heated to 56, 64 or 72 C. The SID of most AA was not different among salami, bologna, beef jerky and cooked ground beef, but was less (P < 0-05) than the values for raw ground beef. The SID of AA for 56 C ribeye roast was not different from the values for raw ground beef and 72 C ribeye roast, but greater (P < 0-05) than those for 64 C ribeye roast. For older children, adolescents and adults, the DIAAS for all proteins, except cooked ground beef,were >100 and bologna and 64 C ribeye roast had the greatest (P < 0-05) DIAAS. The limiting AA for this age groupwere sulphur AA (beef jerky), leucine (bologna, raw ground beef and cooked ground beef) and valine (salami and the three ribeye roasts). In conclusion, meat products generally provide high-quality protein with DIAAS >100 regardless of processing. However, overcooking meat may reduce AA digestibility and DIAAS.
KW - Amino acids
KW - Beef
KW - Digestibility
KW - Digestible indispensable amino acid scores
KW - Protein quality
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U2 - 10.1017/S0007114520000641
DO - 10.1017/S0007114520000641
M3 - Article
C2 - 32089140
AN - SCOPUS:85080063808
SN - 0007-1145
VL - 124
SP - 14
EP - 22
JO - British Journal of Nutrition
JF - British Journal of Nutrition
IS - 1
ER -