Gut health is critical. Problems in the brain often begin in the gut. When the gut becomes permeable and starts leaking toxins, bacteria, food particles into the bloodstream, the brain can be bombarded. Things like Glutamine and Bone Broth can help heal the gut. Also the gut ecology is critical. A lifetime of antibiotics, NSAIDs, processed food, etc can wipe it out. Probotiocs supps, fermented foods, other stuff can bring it back. People think the brain is in charge but seems it is secondary to the gut (the "second brain") in many ways.

All of this can quickly get overwhelming. Functional and Naturopathic docs can help.