ArticleFrontiers in physiology2026
Effects of adding quercetin to soybean meal-based feed on the growth, antioxidant capacity, and gut and liver health of juvenile turbot.
Article in Frontiers in physiology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Introduction: The antioxidant and anti-inflammatory properties of quercetin and their regulatory mechanisms had been extensively studied in aquatic animals. However, limited information was available regarding the effects of quercetin in farmed fish fed diets with high soybean meal inclusion. The purpose of this study was to investigate the effects of adding quercetin to soybean meal-based feed on the growth, antioxidant capacity, and gut and liver health of juvenile turbot. Methods: Five isonitrogenous and isolipidic experimental diets were formulated: a fish meal diet (FM), a diet in which 40% of the fish meal was replaced with soybean meal (SBM), and three diets based on the SBM diet, each supplemented with quercetin at graduated levels of 0.05%, 0.1%, and 0.2%, designated as Q0.05, Q0.1, and Q0.2, respectively. These diets were randomly assigned to 15 tanks (200 L), with 30 juvenile turbot (initial weight 8.41 ± 0.52 g) reared in each tank for a feeding trial of 70 days. Results: The results showed that, compared with the FM group, the specific growth rates (SGR) in the SBM group decreased significantly ( Discussion: In summary, dietary quercetin supplementation in diets with 40% fish meal replacement by soybean meal significantly enhanced antioxidant capacity and protected gut and liver health in turbot, with concomitant improvements in growth performance. The gut-liver axis was possibly involved in this regulatory process. The optimal dietary quercetin supplementation level was 0.2% in the present study.
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