Ideal amino acid profile
These recent and published works allow to assess a dietary ideal AA profile for growing pigs. Recommendation of an AA profile must take into account several factors and is not just an average of published values. As a basis, meta-analyses must be performed to efficiently review a data set and determine a response and a "requirement" value. The methodological aspects must be analysed to understand from where comes the apparent variability in the different trials (protocols, statistical models). It must be also reminded that a requirement estimate is firstly linked to the feedstuffs table or the analyses used in the trial. Then, at the time of making a choice on the AA level, the accuracy of the user's matrix must be considered since an AA profile is also a tool of nutritional risk management. The economic issue is also influencing the decision but the economic optimum varies at every update of the feedstuffs price list and does not change the animals requirement per se. In Table 1, an AA profile is given based on literature review. The efficiency of this AA profile has been tested and confirmed in low CP trials in piglets or fattening pigs (Figure 3).