Gut microbiota plays a role in brain function and mood regulation. Depression is a mental disorder that affects more than 264 million people of all ages worldwide. Understanding its mechanisms is vital for the development of effective therapeutic strategies. Scientists recently conducted a study showing that an imbalance in the gut bacterial community can cause a reduction in some metabolites, resulting in depressive-like behaviors. These findings show that a healthy gut microbiota contributes to normal brain function. Source 5x.