The improvement of growth performance of fattening pigs observed in the present study confirms the potential of PFAs to
be used as performance enhancers. Furthermore, the significant reduction of NH3 emissions achieved by the tested quillaja
saponin containing PFAs suggests their use as an additional tool for the reduction of NH3 emissions from pig production.
However, further research is warranted to identify the exact mode of actions of these additives in terms of growth promotion
as well as NH3 emission reduction.