“Lactobacillus helveticus can decrease anxiety in mice,10 and Lactobacillus reuteri can reduce the likelihood that mice will develop infections when they’re stressed.11 Lactobacillus rhamnosus GG has been reported to reduce obsessive-compulsive behaviors, such as marble burying, in mice,12 and as we mentioned in the section on autism, probiotic strains of Bacteroides fragilis can rescue mice from some autistic-like traits, including cognitive deficits and repetitive behavior.”