Abstract
Plasma lysine increased in a linear manner when fasted chicks were fed, ad libitum for 30 minutes, a crystalline amino acid diet containing graded concentrations of lysine. The same trend was noted when a single meal from either a crystalline amino acid mixture or dried egg white was force-fed in the form of a slurry. When a constant dose of lysine (25 mg/meal) was administered in a series of multiple meals, plasma lysine increased in a linear fashion up to the final (16th) meal when the crystalline amino acid mixture was used, whereas plasma lysine plateaued at the eighth meal of dried egg white. However, when the crystalline amino acid mixture was a component of the complete diet, the concentration of plasma lysine plateaued at the eighth meal also.