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Two hundred Cobb-500 broiler chicks were assigned to four dietary treatments in a Completely Randomized Design: a control diet and three reduced crude protein (CP) diets (-1PP, -2PP, -3PP). Diets contained CP levels of 21%, 20%, 19%, 18% during grower (14\u201328d) and 19.5%, 18.5%, 17.5%, 16.5% during finisher (28\u201342d) phases. Broilers on up to 2% CP reduction exhibited similar (\n                    <jats:italic>P\u2009&lt;\u2009<\/jats:italic>\n                    0.05) or superior growth performance and feed conversion ratio compared to 3% CP reduction. Gross margin was highest (\n                    <jats:italic>P\u2009&lt;\u2009<\/jats:italic>\n                    0.05) with up to 2% CP reduction but declined with further reduction. Carcass traits and breast yield decreased (\n                    <jats:italic>P\u2009&lt;\u2009<\/jats:italic>\n                    0.05) with CP reduction, though meat quality was unaffected. N intake and retention decreased (\n                    <jats:italic>P\u2009&lt;\u2009<\/jats:italic>\n                    0.05), while excretion and other N utilization parameters were unchanged. Nutrient digestibility remained consistent, but apparent metabolizable energy increased (\n                    <jats:italic>P\u2009&lt;\u2009<\/jats:italic>\n                    0.05) as dietary CP decreased. These findings indicate that reducing dietary CP by up to 2%, supplemented with the first three limiting amino acids, maintains growth performance, profitability, and meat quality. This approach also reduces environmental N emissions and offers a cost-effective strategy for developing economies compared to reduced-protein diets with additional amino acid supplementation.\n                  <\/jats:p>","DOI":"10.1007\/s11250-025-04396-6","type":"journal-article","created":{"date-parts":[[2025,4,1]],"date-time":"2025-04-01T08:48:23Z","timestamp":1743497303000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Implementing reduced-protein diets for broiler chickens in emerging economies: supplementation with only the first three limiting amino acids"],"prefix":"10.1007","volume":"57","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6986-876X","authenticated-orcid":false,"given":"Damilola U.","family":"Kareem","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5973-3175","authenticated-orcid":false,"given":"Adeola V.","family":"Adegoke","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5926-7314","authenticated-orcid":false,"given":"Adedoyin T.","family":"Amos","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4613-2853","authenticated-orcid":false,"given":"Emmanuel A.","family":"Adeyeye","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5591-3523","authenticated-orcid":false,"given":"Olubukola P. 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