They were randomly assigned to take either the B. subtilis supplement or placebo capsules every day for 30 days. In the end, the study found, the probiotic nearly wiped out S. aureus in the gut, ...

The new study, reported in The Lancet Microbe, found that the probiotic Bacillus subtilis markedly reduced S. aureus colonization in trial participants without harming the gut microbiota, which ...