The transplant restored the recipients’ lack of healthy microbes, increasing the number of good microbes in their gut. However, as researchers began learning how critical a healthy gut microbiome is for mental health, this procedure is now being tested for people with difficult mental issues, such as depression. Positive research results have demonstrated that restoring a well-balanced microbiome can flip the switch, revealing a clear connection between gut microbes and mood. Meanwhile, the lack of a diverse, healthy microbiome produces disturbing behavioral results, as researchers have observed in animals like rats and mice. While it might be hard to pinpoint how we can change our brains to improve our microbiomes, people still have an easy method to improve gut health.