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The productive performances and nitrogen (N) balance, blood markers related to protein metabolism, apparent digestibility of nutrients, carcass, and meat quality were evaluated. This dietary CP restriction did not impair the growth performances, decreased the N excretion, and did not affect the apparent digestibility of most nutrients, except phosphorus digestibility, which was reduced in the low\u2010CP diet. The responses to this dietary CP restriction were independent of sex, except the serum urea concentration and total proteins, which were only steadily reduced in intact males fed the low\u2010CP diet. The low\u2010CP diet reduced the nutritional pork quality by increasing the moisture content, although the technological characteristics of meat were not affected. Further studies are required to improve the sex\u2010tailored feeding strategies for high\u2010conformed lean pigs in an environmentally friendly context.<\/jats:p>","DOI":"10.1111\/asj.70033","type":"journal-article","created":{"date-parts":[[2025,2,2]],"date-time":"2025-02-02T23:50:20Z","timestamp":1738540220000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Dietary Protein Reduction in Lean Pigs From Pietrain Paternal Line Under Commercial Setting: An Interplay Between Nitrogen Efficiency and Meat Attributes"],"prefix":"10.1111","volume":"96","author":[{"given":"Javier","family":"\u00c1lvarez\u2010Rodr\u00edguez","sequence":"first","affiliation":[{"name":"Departamento de Producci\u00f3n Animal y Ciencia de los Alimentos, Escuela Polit\u00e9cnica Superior Universidad de Zaragoza\u2010CITA\u2010IA2  Huesca Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Alba","family":"Vigo\u2010Morancho","sequence":"additional","affiliation":[{"name":"Departamento de Ciencias Agrarias y del Medio Natural, Escuela Polit\u00e9cnica Superior Universidad de Zaragoza  Huesca Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Francisco\u00a0Javier","family":"Miana\u2010Mena","sequence":"additional","affiliation":[{"name":"Departamento de Farmacolog\u00eda, Fisiolog\u00eda y Medicina Legal y Forense, Facultad de Veterinaria Universidad de Zaragoza\u2010CITA\u2010IA2  Zaragoza Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Leticia","family":"P\u00e9rez\u2010Ciria","sequence":"additional","affiliation":[{"name":"Departamento de Producci\u00f3n Animal y Ciencia de los Alimentos, Facultad de Veterinaria Universidad de Zaragoza\u2010CITA\u2010IA2  Zaragoza Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3005-2675","authenticated-orcid":false,"given":"Maria\u00a0Angeles","family":"Latorre","sequence":"additional","affiliation":[{"name":"Departamento de Producci\u00f3n Animal y Ciencia de los Alimentos, Facultad de Veterinaria Universidad de Zaragoza\u2010CITA\u2010IA2  Zaragoza Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2025,2,2]]},"reference":[{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.meatsci.2009.11.015"},{"key":"e_1_2_8_3_1","volume-title":"Association of Official Analytical Chemists Official Methods of Analysis","author":"AOAC","year":"2005"},{"key":"e_1_2_8_4_1","doi-asserted-by":"publisher","DOI":"10.2527\/jas2017.1818"},{"key":"e_1_2_8_5_1","doi-asserted-by":"publisher","DOI":"10.3390\/su141912016"},{"key":"e_1_2_8_6_1","first-page":"20221","article-title":"Orden de 31 de julio de 1979 por la que se establecen m\u00e9todos oficiales de an\u00e1lisis de aceites y grasas, productos c\u00e1rnicos, cereales y derivados, fertilizantes, productos fitosanitarios, productos l\u00e1cteos, piensos, aguas y productos derivados de la uva","volume":"207","author":"BOE","year":"1979","journal-title":"Bolet\u00edn Oficial del Estado"},{"key":"e_1_2_8_7_1","first-page":"7161","article-title":"Determinaci\u00f3n de las cenizas insolubles en \u00e1cido clorh\u00eddrico. 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