Growth of B. infantis 17930 (A), L. acidophilus NCFM (B), and Lactobacillus strain GG (C) in MRS broth containing either no added sugar (⧫), 2% glucose (▴), 2% commercial FOS (●), or 2% pure FOS (■). To account for the glucose, fructose, and sucrose in the commercial FOS, cells were also grown in MRS broth containing equivalent amounts of these sugars (◊).