ArticleTranslational animal science2026
Response to excessive selenium intake in the modern sow; a retrospective analysis of a case review.
Article in Translational animal science, 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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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Authors and funding
5 authors.
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Abstract
In June 2023, an incident at a Norwegian feed mill caused pig feed being over-supplemented with sodium selenite (NaSe), resulting in feed selenium concentrations ranging from 2.47 to 4.70 mg Se/kg feed from sodium selenite (NaSe), levels exceeding the European Union (EU) regulatory upper limit of total 0.5 mg Se/kg feed (standardized at 88% DM). The feed containing excessive selenium was unknowingly sent out to production farms. Selenium is an essential trace mineral with a narrow dose range between deficiency and toxicity. The National Research Council (NRC) reports selenium requirements at concentrations of 0.15 mg Se/kg feed for sows and finishing pigs, and 0.30 mg Se/kg feed for weanlings, but studies suggest these levels may not always meet requirements in modern swine production systems. This case study aimed to evaluate the effects of excessive dietary selenium intake on reproductive performance in breeding sows and piglet weaning weight. Data were collected from 516 sows (155 TN70 and 361 Landrace sows) across two Norwegian farms between 2022 and 2024, yielding 895 litter records. Mixed effects models were fitted to evaluate nonpregnant outcomes, stillbirths, litter size, and piglet weaning weight. Despite excessive dietary selenium concentrations, no clinical signs of selenosis or adverse reproductive effects were observed. Excessive selenium intake had no significant effect on nonpregnant outcomes, stillbirths, litter size or piglet weaning weight (all
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