Functional endocrinology is a modern and holistic approach to addressing hormonal imbalances using state of the art laboratory testing to evaluate the delicate balance between the brain and adrenal, thyroid, and sex hormones. We also consider the role of cortisol, our primary stress hormone, in connection with the impact of daily stress in modern life. These combined factors affect various endocrine issues such as thyroid dysfunction, insulin resistance, autoimmunity, inflammation, and obesity.