Probiotics modulated brain activity in people with irritable bowel syndrome (IBS), and these changes were associated with symptom improvement in a small, randomized controlled trial comparing probiotics with placebo. 

Probiotic treatment in IBS patients led to positive brain changes and symptom improvement, as shown in a small trial. The study highlights potential neurobiological effects of probiotics, suggesting further research is needed to confirm these findings.

Source: MEDspace