Lactobacillus reuteri

Lactobacillus reuteri is a gram-positive, lactic acid bacteria that is commonly found in the human gastrointestinal tract and mouth. Lactobacillus reuteri is one of the most common types of probiotics and can be found in fermented foods, yogurt and dietary supplements. It is one of many species of bacteria in the family Lactobacillaceae (or "rod shaped" bacteria). 

Like other probiotics, Lactobacillus reuteri is considered a "good" bacteria and important for a healthy gut flora. Lactobacillus reuteri helps fight off "bad" bacteria that might cause diseases, such as irritable bowel syndrome, hence taken as a supplement to aid digestive health.

For nutritional values, refer to the Codex entry for Probiotic.