The bi-directional highway between the brain and the body is called the vagus nerve. In case of lack of nutrients in the vagus nerve, physical symptoms such as loss of sleep, reduced immunity and reduced mental clarity can show up. "Supporting your vagus nerve with certain nutrients keeps the messages being sent strong and clear so your brain is able to hear and respond to your bodies needs," wrote Therapist Anna Papaioannou as she shared the nutrients that are necessary for the vagus nerve.