FOS and colitis: Male BALB/c mice were induced with 2.5% DSS for colitis and then treated with low-, medium-, and high-dose mixed probiotics and oligofructose synbiotics (6 × 106 CFU probiotics + 1.5 mg FOS synbiotics/day, 6 × 107 CFU probiotics + 1.5 mg FOS synbiotics/day, and 6 × 108 CFU probiotics + 1.5 mg FOS synbiotics/day) for 1 week.