• Reducing protein with optimal amino acid supplementation does not compromise broiler growth. • Reducing crude protein effectively mitigates the environmental footprint. • Lower protein levels improve gut health and animal welfare. • The successful implementation of these strategies relies on advanced analytical tools. Efficient poultry production depends on the optimal supplementation of energy and standardized ileal digestible ( SID ) amino acids to realize the genetic potential for whole-body protein deposition. While the requirements for energy and SID amino acids—such as the SID lysine-to-energy ratio—are well-documented, industry adoption of these findings remains slow. Consequently, many commercial formulations still rely on crude protein ( CP ) as a primary constraint. This reliance on high levels of protein meal inclusion leads to increased indigestible protein and excess absorbed amino acids, which in turn trigger various metabolic, health, welfare, and environmental challenges. This symposium paper explores how the poultry industry can effectively manage nitrogen emissions while maintaining optimal growth performance by leveraging the latest advancements in precision nitrogen ( N ) nutrition.
Kim et al. (Sun,) studied this question.