“…The most commonly used nonmilk NDOs in pediatric trials are: (Alliet et al, 2007;Arslanoglu et al, 2007a,b;Bongers et al, 2007;Brunser et al, 2006;Bruzzese et al, 2006;Costalos et al, 2008;Euler et al, 2005;Indrio et al, 2007;Kapiki et al, 2007;Moore et al, 2003;Rinne et al, 2003Rinne et al, , 2005aSavino et al, 2003Savino et al, , 2005van Hoffen et al, 2009;Waligora-Dupriet et al, 2007;Ziegler et al, 2007) The amount of fecal bifidobacteria, their percentage compared to the total number of bacteria, and the production of SCFA are generally used in evaluating their prebiotic effect. They can be extracted from natural sources, synthesized from monomers and/or small oligosaccharides, or produced by natural polymer hydrolysis.…”