Rob Knight

“But farmers noticed as far back as the 1950s that livestock on low doses of antibiotics gained weight a lot more rapidly, even at doses lower than the therapeutic dose. Livestock in the United States is commonly treated with low doses of antibiotics solely to increase the size, and thus the value, of the animals.”
― Rob Knight, Follow Your Gut: The Enormous Impact of Tiny Microbes

“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.”
― Rob Knight, Follow Your Gut: The Enormous Impact of Tiny Microbes