HPLC analyses showed that the probiotics and bifidobacteria
were using different sugars to support their growth in cows'milk or soy beverage. In the cows' milk the concentration of
lactose declined over time, whether or not the milk contained
added probiotic bacteria or bifidobacteria. As lactose values
were declining, the concentrations of galactose in all the fermenting
milks increased. The glucose concentration in cows'
milk remained low during the 12 h fermentation.