Natural Factors Critical Care Probiotic 100 Billion Active Cells contains nine Bifidobacteria and Lactobacilli species for acute targeted support of both the small and large intestines. It restores beneficial bacteria lost through antibiotic use and enhances immune health. This formula offers significant protection from bacterial infection, yeast overgrowth, and digestive discomfort. Provides maximum support for acute digestive health needs. Restores and maintains healthy, balanced intestinal flora. Combats antibiotic-associated digestive discomfort and yeast infections. Supports GI intestinal integrity to help prevent or repair “leaky gut” syndrome. Enhances immune system activity and reduces inflammation. Limits growth of putrefactive and pathogenic bacteria. DOSAGE: 1 capsule daily or as directed by a health care practitioner. Take at least 2-3 hours before or after antibiotics.