but not the
low-dose (1 × 109 CFU/mL) piglets [33]. Furthermore, Yu et al. [25] fed weaned piglets with diets
containing 3.2 × 106 CFU/g, 5.8 × 107 CFU/g or 2.9 × 108 CFU/g of L. fermentum I5007. Their results
showed that a dose of 5.8 × 107 CFU/g maximized the digestibility of crude protein among the
different concentrations of L. fermentum.