The compilation of studies presented in the bulletin 28 is based on previous compilation B23 which has been updated with more recent trials.
All the trial quoted in this compilation had to respect the following experimental design: piglets…AA composition.
In another hand, various diets, genotypes and housing conditions were used. Despite these differences, we could consolidate our previous recommandation and confirm that a ratio (ileal standardied digestible) at 22 % otpimises feed intake, growth and feed conversion ratio.