Fact Sheet Number
Amino acids are the building blocks for protein deposition (lean muscle), important in physiological functions that influence endocrinology and gene expression, and are utilized as an expensive energy source when energy is limited or excess amino acids are present. Feed efficiency is optimized when dietary amino acids are balanced accounting for the pigs feed intake (energy consumption) and protein deposition rate (lean gain).
Iowa State University
Storlie, Mark P., "Swine Feed Efficiency: Influence of Amino Acids" (2012). Iowa Pork Industry Center Fact Sheets. 5.