{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,2]],"date-time":"2026-10-02T03:53:23Z","timestamp":1790913203606,"version":"4.1.0"},"reference-count":17,"publisher":"Korean Society of Animal Science and Technology","issue":"4","license":[{"start":{"date-parts":[[2025,7,1]],"date-time":"2025-07-01T00:00:00Z","timestamp":1751328000000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0"}],"content-domain":{"domain":["www.ejast.org"],"crossmark-restriction":true},"short-container-title":["J Anim Sci Technol"],"published-print":{"date-parts":[[2025,7]]},"abstract":"<jats:p>This study was conducted to investigate effects of diets with varying levels of\n                    vitamin premix on egg production, eggshell quality, and vitamin contents in eggs\n                    of commercial laying hens. A total of 144 Hy-line Brown layers at 45 weeks old\n                    were randomly divided into four groups (six replicates, 6 birds for each group)\n                    and fed diets containing different levels of vitamin premix for eight weeks.\n                    Laying hens in the control group received diet containing 100% vitamin premix\n                    (0.1% in experimental diet). The other three groups received diet containing\n                    75%, 50% or 0% of vitamin premix compared to control, respectively. Egg\n                    production and daily egg mass in layers fed diet without vitamin premix were\n                    significantly lower (p &lt; 0.01) than those in the control\n                    group during the second half of the experiment (four weeks). Linear trend for\n                    egg production was determined with increasing dietary vitamin premix levels\n                    during the same period. There was no significant difference in feed intake or\n                    blood profile among groups. Significant linear and quadratic improvement for\n                    eggshell strength and thickness were found with increasing dietary vitamin\n                    premix level at 4 and 6 weeks of the experiment (p &lt;\n                    0.05). Concentrations of riboflavin and \u03b1-tocopherol in eggs obtained\n                    from the control group were significantly higher than those of the group fed a\n                    diet without vitamin premix (p &lt; 0.05). These results\n                    suggest that reducing more than 50% or withdrawal of vitamin premix in layer\n                    diet did negatively affect egg production or egg qualities as the period of\n                    deprivation increased. To produce healthy chicken eggs, it is recommended to\n                    feed a diet that contains sufficient levels of vitamin premix.<\/jats:p>","DOI":"10.5187\/jast.2024.e44","type":"journal-article","created":{"date-parts":[[2024,4,21]],"date-time":"2024-04-21T21:02:57Z","timestamp":1713733377000},"page":"797-804","update-policy":"https:\/\/doi.org\/10.5187\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Feeding of reduced vitamin premix negatively affects laying\n                    performance and vitamin contents in chicken eggs"],"prefix":"10.5187","volume":"67","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5759-4108","authenticated-orcid":false,"given":"Yong Jun","family":"Choi","sequence":"first","affiliation":[{"name":"School of Animal Life Convergence Science, Hankyung National University, Anseong 17579, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5100-1834","authenticated-orcid":false,"given":"Yong Ran","family":"Kim","sequence":"additional","affiliation":[{"name":"Division of Animal Husbandry, Yonam College, Cheonan 31005, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6243-0407","authenticated-orcid":false,"given":"Eun Jip","family":"Kim","sequence":"additional","affiliation":[{"name":"Division of Animal Husbandry, Yonam College, Cheonan 31005, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8392-9864","authenticated-orcid":false,"given":"Kwan Eung","family":"Kim","sequence":"additional","affiliation":[{"name":"R&D center, Nonghyup Feed, Seoul 05398, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3158-2491","authenticated-orcid":false,"given":"Byoung Ki","family":"An","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/025h1m602","id-type":"ROR","asserted-by":"publisher"}],"name":"Animal Resources Research Center, Konkuk University, Seoul 05029, Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"3132","published-online":{"date-parts":[[2025,7,31]]},"reference":[{"key":"key2.0261002113437e+13_B1","doi-asserted-by":"crossref","DOI":"10.1002\/9780470376911","volume-title":"Vitamins in animal and human nutrition","author":"McDowell","year":"2000","edition":"2nd ed"},{"key":"key2.0261002113437e+13_B2","volume-title":"Nutrition and feeding of poultry","author":"Larbier","year":"1994"},{"key":"key2.0261002113437e+13_B3","volume-title":"Nutrients requirements of poultry","author":"NRC (National Research Council)","year":"1994","edition":"9th ed"},{"key":"key2.0261002113437e+13_B4","volume-title":"Nutrients requirements of poultry","author":"NRC (National Research Council)","year":"1984","edition":"8th ed"},{"key":"key2.0261002113437e+13_B5","volume-title":"Korean feeding standard for poultry","author":"National Institute of Animal Science","year":"2017","edition":"3th ed"},{"key":"key2.0261002113437e+13_B6","doi-asserted-by":"crossref","DOI":"10.1017\/jan.2019.4","article-title":"Growth performance and bone characteristics of broiler chickens\n                        fed corn-soy diet supplemented with different levels of vitamin premix and\n                        sources of mineral premix","volume":"7","author":"Ao","year":"2019","journal-title":"J Appl Anim Nutr."},{"key":"key2.0261002113437e+13_B7","doi-asserted-by":"crossref","first-page":"347","DOI":"10.1093\/japr\/2.4.347","article-title":"Dietary vitamin and\/or trace mineral premix effects on\n                        performance, humoral mediated immunity, and carcass composition of broilers\n                        during thermoneutral and high ambient temperature distress","volume":"2","author":"Deyhim","year":"1993","journal-title":"J Appl Poult Sci."},{"key":"key2.0261002113437e+13_B8","doi-asserted-by":"crossref","first-page":"233","DOI":"10.1590\/S1516-635X2012000400002","article-title":"Effects of the reduction or withdrawal of the vitamin premix from\n                        the diet on chicken performance and meat quality","volume":"14","author":"Moravej","year":"2012","journal-title":"Braz J Poult Sci."},{"key":"key2.0261002113437e+13_B9","doi-asserted-by":"crossref","first-page":"351","DOI":"10.1590\/1806-9061-2015-0053","article-title":"Effects of diets with graded levels of canola meal on the growth\n                        performance, meat qualities, relative organ weights, and blood\n                        characteristics of broiler chickens","volume":"18","author":"An","year":"2016","journal-title":"Braz J Poult Sci."},{"key":"key2.0261002113437e+13_B10","doi-asserted-by":"crossref","first-page":"22","DOI":"10.3390\/foods10010022","article-title":"Age of laying hens significantly influences the content of\n                        nutritionally vital lipophilic compounds in eggs","volume":"10","author":"Ko","year":"2021","journal-title":"Foods."},{"key":"key2.0261002113437e+13_B11","doi-asserted-by":"crossref","first-page":"1989","DOI":"10.3382\/ps.0721989","article-title":"Research note: early detection of the absence of a vitamin premix\n                        in layer diets by egg albumen riboflavin analysis","volume":"72","author":"Naber","year":"1993","journal-title":"Poult Sci."},{"key":"key2.0261002113437e+13_B12","doi-asserted-by":"crossref","first-page":"483","DOI":"10.3382\/ps.0720483","article-title":"Vitamin profiles of eggs as indicators of nutritional status in\n                        the laying hen: riboflavin study","volume":"72","author":"Squires","year":"1993","journal-title":"Poult Sci."},{"key":"key2.0261002113437e+13_B13","doi-asserted-by":"crossref","first-page":"217","DOI":"10.4141\/cjas85-023","article-title":"Choline, niacin and thiamine supplementation of canola and\n                        soybean protein diets fed to broilers to 6 wk of age","volume":"65","author":"Summers","year":"1985","journal-title":"Can J Anim Sci."},{"key":"key2.0261002113437e+13_B14","doi-asserted-by":"crossref","first-page":"159","DOI":"10.1080\/00071660600610732","article-title":"Effect of vitamin and trace mineral withdrawal from finisher\n                        diets on growth performance and immunocompetence of broiler\n                        chickens","volume":"47","author":"Khajali","year":"2006","journal-title":"Br Poult Sci."},{"key":"key2.0261002113437e+13_B15","doi-asserted-by":"crossref","first-page":"354","DOI":"10.3382\/japr.2010-00198","article-title":"Supplemental vitamin E and selenium effects on egg production,\n                        egg quality, and egg deposition of \u03b1-tocopherol and\n                        selenium","volume":"19","author":"Scheideler","year":"2010","journal-title":"J Appl Poult Res."},{"key":"key2.0261002113437e+13_B16","doi-asserted-by":"crossref","first-page":"189","DOI":"10.1590\/S1516-635X2011000300005","article-title":"Effects of different dietary vitamin combinations on the egg\n                        quality and vitamin deposition in the whole egg of laying\n                        hens","volume":"13","author":"Zang","year":"2011","journal-title":"Braz J Poult Sci."},{"key":"key2.0261002113437e+13_B17","doi-asserted-by":"crossref","first-page":"109","DOI":"10.2141\/jpsa.0130134","article-title":"Role of vitamin E in counteracting oxidative stress in\n                        poultry","volume":"51","author":"Panda","year":"2014","journal-title":"J Poult Sci."}],"container-title":["Journal of Animal Science and Technology"],"original-title":[],"language":"en","link":[{"URL":"http:\/\/www.ejast.org\/download\/download_pdf?doi=10.5187\/jast.2024.e44","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"http:\/\/www.ejast.org\/download\/download_pdf?doi=10.5187\/jast.2024.e44","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,10,2]],"date-time":"2026-10-02T02:53:21Z","timestamp":1790909601000},"score":1,"resource":{"primary":{"URL":"http:\/\/www.ejast.org\/archive\/view_article?doi=10.5187\/jast.2024.e44"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,7]]},"references-count":17,"journal-issue":{"issue":"4","published-online":{"date-parts":[[2025,7,31]]},"published-print":{"date-parts":[[2025,7]]}},"alternative-id":["10.5187\/jast.2024.e44"],"URL":"https:\/\/doi.org\/10.5187\/jast.2024.e44","relation":{},"ISSN":["2672-0191","2055-0391"],"issn-type":[{"value":"2672-0191","type":"print"},{"value":"2055-0391","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,7]]},"assertion":[{"value":"2023-10-11","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2024-04-18","order":1,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}}]}}