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. 2022 Mar 18;9:862572. doi: 10.3389/fvets.2022.862572

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Copyright © 2022 Han, Cui, Shen, Li, Ren, Bungo, Chowdhury, Li and Li.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Changes in serum antioxidative parameters in the control and L-leucine (L-Leu) groups. (A,B) Serum concentrations of malondialdehyde (MDA) and glutathione peroxidase (GPx) after chronic heat stress at 39 days of age; (C,D) serum concentrations of catalase (CAT) activity and total antioxidant capacity (T-AOC) after 1 week of recovery at 46 days of age. The number of chickens in each group was n = 6. *P < 0.05.