Bodies, it turns out, know how to heal, and sometimes nature is the best pharmacist. Dr. Hyla Cass is an integrative psychiatrist and an expert on mental health, brain degeneration, and dementia. Her message: personalized prevention is possible if you know the right strategies, and so is recovery from overmedication. After more than 30 years in the field, medical researchers are coming into alignment with this philosophy and studies are now demonstrating the power of lifestyle intervention.