Low protein digestibility-corrected amino acid score and net nitrogen-to-protein conversion factor value of edible insects.

Autor: Ochiai M; School of Veterinary Medicine, Kitasato University, Higashi 23-35-1 Towada, Aomori 034-8628, Japan. Electronic address: mochiai@vmas.kitasato-u.ac.jp., Suzuki Y; School of Veterinary Medicine, Kitasato University, Higashi 23-35-1 Towada, Aomori 034-8628, Japan., Suzuki R; School of Veterinary Medicine, Kitasato University, Higashi 23-35-1 Towada, Aomori 034-8628, Japan., Iwata K; School of Veterinary Medicine, Kitasato University, Higashi 23-35-1 Towada, Aomori 034-8628, Japan., Murayama M; School of Veterinary Medicine, Kitasato University, Higashi 23-35-1 Towada, Aomori 034-8628, Japan.
Jazyk: angličtina
Zdroj: Food chemistry [Food Chem] 2024 Oct 01; Vol. 454, pp. 139781. Date of Electronic Publication: 2024 May 21.
DOI: 10.1016/j.foodchem.2024.139781
Abstrakt: The amount of chitin, a nitrogen-containing dietary fiber, in edible insects can mislead the exact nitrogen-to-protein conversion factor (NPF) and true protein content. We determined the amino acid score (AAS), protein digestibility-corrected AAS (PDCAAS), chitin content, and net NPF of five edible insects. Additionally, the effect of the amino acid composition of migratory locust on rat growth were investigated. The AAS of the insects were ranged from 63 to 94. The chitin contents were ranged from 1.6 g/100 g to 10.7 g/100 g. The PDCAAS, calculated by AAS and gut-intestinal digestibility, ranged from 44 to 81, which was lower than casein (97). The net NPF ranged from 4.93 to 5.76, which were lower than the conventional value. Dietary migratory locust, whose PDCAAS was the lowest, decreased growth and altered lipid metabolism. Therefore, a lower PDCAAS and overestimation of net NPF of insects can affect the true protein calculations and growth.
Competing Interests: Declaration of competing interest All the authors have no conflicts of interest.
(Copyright © 2024 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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