Dr. Datis Kharrazian, a functional neurologist and author of Why Isn’t My Brain Working?, has synthesized vast bodies of research and contributed cutting-edge solutions to the realm of cognitive impairment and degenerative conditions. One of his recommendations to activate the vagus nerve and to stimulate gut-brain harmony and improve gut motility is simple and effective: fill a glass of water and gargle forcefully with each sip until your eyes tear. Do this several times a day.

