{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,24]],"date-time":"2026-07-24T12:00:02Z","timestamp":1784894402681,"version":"3.55.0"},"reference-count":25,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2023,10,2]],"date-time":"2023-10-02T00:00:00Z","timestamp":1696204800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Animal Physiology Nutrition"],"published-print":{"date-parts":[[2024,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>This work evaluated the influence of vitamin A on performance, organ weight, and bone and skin characteristics in broilers (Cobb 500) at 21 and 42 days of age. A total of 1920 chickens were distributed in a randomised design, considering six vitamin A supplementation levels (0, 6000, 16,000, 26,000, 36,000, and 46,000\u2009IU\u2009kg<jats:sup>\u22121<\/jats:sup>), with 16 replicates and 20 chickens per experimental unit, established due to rising the range of vitamin levels observed in the literature to evaluate the effect of vitamin A on broilers. At 22 days, half of the replicates from each treatment continued receiving the initial diet, and the other eight\u00a0repetitions received diets without vitamin A (0\u2009IU\u2009kg<jats:sup>\u22121<\/jats:sup>) until 42 days. The level of vitamin A influenced feed intake (FI) and body weight gain (BWG) until 21 days for all treatments. Broilers at 21 days of age had a more significant BWG at a vitamin A supplementation level of 28,209\u2009IU\u2009kg<jats:sup>\u22121<\/jats:sup>. At 42 days, vitamin A influenced the BWG and FI of broilers at treatments that were not supplemented after 21 days. Treatments supplemented up to 42 days showed quadratic responses to vitamin A for BWG, FI, and feed conversion. The vitamin A levels influenced the relative weights of the small intestine, pancreas, gizzard, abdominal fat, Seedor index, and breaking strength at 42 days, where the adequate supplementation of vitamin A improved these characteristics in broilers. Vitamin A supplementation from 22 to 42 days old did not affect broiler performance. An increased BWG was obtained when vitamin A supplementation occurred until 42 days, with supplementation of 29,375\u2009IU\u2009kg<jats:sup>\u22121<\/jats:sup> and a lower response of feed conversion with the addition of 27,775\u2009IU\u2009kg<jats:sup>\u22121<\/jats:sup>.<\/jats:p>","DOI":"10.1111\/jpn.13885","type":"journal-article","created":{"date-parts":[[2023,10,3]],"date-time":"2023-10-03T05:08:26Z","timestamp":1696309706000},"page":"264-273","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Performance and bone characteristics of broilers fed diets supplemented with vitamin A at different concentrations"],"prefix":"10.1111","volume":"108","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3732-1049","authenticated-orcid":false,"given":"Vaneila D. L.","family":"Savaris","sequence":"first","affiliation":[{"name":"Western Paran\u00e1 State University\u2014Marechal C\u00e2ndido Rondon  Cascavel Paran\u00e1 Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Paulo C.","family":"Pozza","sequence":"additional","affiliation":[{"name":"State University of Maring\u00e1 Maring\u00e1 Paran\u00e1 Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Clauber","family":"Polese","sequence":"additional","affiliation":[{"name":"Western Paran\u00e1 State University\u2014Marechal C\u00e2ndido Rondon  Cascavel Paran\u00e1 Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jos\u00e9 G.","family":"de Vargas","sequence":"additional","affiliation":[{"name":"Federal University of Esp\u00edrito Santo Vit\u00f3ria Esp\u00edrito Santo Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maira S. D.","family":"Pavlak","sequence":"additional","affiliation":[{"name":"Western Paran\u00e1 State University\u2014Marechal C\u00e2ndido Rondon  Cascavel Paran\u00e1 Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lucas","family":"Wachholz","sequence":"additional","affiliation":[{"name":"Western Paran\u00e1 State University\u2014Marechal C\u00e2ndido Rondon  Cascavel Paran\u00e1 Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2075-0565","authenticated-orcid":false,"given":"Bruno S.","family":"Vieira","sequence":"additional","affiliation":[{"name":"Federal Institute of Mato Grosso\u2014Alta Floresta Cuiab\u00e1 Mato Grosso Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Guilherme L. S.","family":"Tesser","sequence":"additional","affiliation":[{"name":"Western Paran\u00e1 State University\u2014Marechal C\u00e2ndido Rondon  Cascavel Paran\u00e1 Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Paulo L.","family":"de Oliveira Carvalho","sequence":"additional","affiliation":[{"name":"Western Paran\u00e1 State University\u2014Marechal C\u00e2ndido Rondon  Cascavel Paran\u00e1 Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8839-3758","authenticated-orcid":false,"given":"Cinthia","family":"Eyng","sequence":"additional","affiliation":[{"name":"Western Paran\u00e1 State University\u2014Marechal C\u00e2ndido Rondon  Cascavel Paran\u00e1 Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ricardo V.","family":"Nunes","sequence":"additional","affiliation":[{"name":"Western Paran\u00e1 State University\u2014Marechal C\u00e2ndido Rondon  Cascavel Paran\u00e1 Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2023,10,2]]},"reference":[{"key":"e_1_2_10_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.japr.2019.10.010"},{"key":"e_1_2_10_3_1","doi-asserted-by":"publisher","DOI":"10.3382\/ps\/pev305"},{"key":"e_1_2_10_4_1","doi-asserted-by":"publisher","DOI":"10.1017\/S004393391600074X"},{"key":"e_1_2_10_5_1","doi-asserted-by":"publisher","DOI":"10.3382\/ps\/pey571"},{"issue":"2","key":"e_1_2_10_6_1","first-page":"71","article-title":"Vitamin A\u2014Functions, dietary requirements and safety in humans","volume":"67","author":"Gerster H.","year":"1996","journal-title":"International Journal Vitamin Nutrition Research"},{"issue":"9","key":"e_1_2_10_7_1","first-page":"655","article-title":"Retinoids, retinoid\u2010responsive genes, cell differentiation, and cancer","volume":"3","author":"Gudas L. 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