What if your depression or memory issues are actually a warning sign from your metabolism?. We speak with functional medicine practitioner Dr. Smith about the powerful connection between your gut, your hormones, and your brain. We discuss the physical stressors that mimic emotional stress, the inverse relationship between cortisol and insulin, and why the "health food" you are eating might be causing inflammation. Plus, Dr. Smith reveals why standard thyroid tests might be missing the real issue: the immune system.