Effects of increasing levels of dietary L-Leucine on growth performance, carcass traits and blood parameters of male broilers in the grower period

The team of researchers involved in this study would like to report that the fundamentals presented to Dr Oscar Briceño, where they consider that the use of adequate levels of valine and isoleucine in the feed would be sufficient to neutralize the antagonism of excess leucine with these two amino acids, it doesn't seem right to me. I think this statement would make some sense if the improvements obtained in the performance parameters and evaluated carcass, due to the increase in leucine levels, had been linear.

Mohammad Hosein Shahir I don't think I made myself understood. My consideration was made based on your explanations made to the questioning of Dr Oscar Briceño, where it is stated that levels of the amino acids valine and isoleucine in the requirement of birds, is sufficient to neutralize the antagonism of excess leucine with these two amino acids., This statement does not seems correct to me, I think that the antagonism also occurs, whether or not valine and isoleucine are in the birds' requirement.