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. 2023 Feb 24;12(3):570. doi: 10.3390/antiox12030570

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© 2023 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Treemap of outcomes evaluated from selected studies in the meta-analysis. The labels “Cyclic”, “Chronic” and “Acute”, are the different categories of HS applied in a study. The two or three-letter abbreviations correspond to a category of outcomes. The shade of gray refers to the number of reports that did or did not study a particular outcome in their trials. Abbreviations: AO: antioxidant parameters; GLN: dietary glutamine concentration; GP: growth performances; HRM: hormones; IM: intestinal morphology; NS: not studied; S: studied; SB: serum biochemicals.