<B>Unlock the full potential of your Vagus Nerve with this transformational guide, including practical strategies to treat headache, chronic pain, anxiety, depression, and more.</B><BR><BR>Harness the power of vagus nerve (VN) function and heart rate variability (HRV) in the long-awaited follow-up to bestseller <i>Activate Your Vagus Nerve </i>by Dr. Navaz Habib. This entirely new book goes beyond activation alone to explore stressors, measurement techniques, and practical protocols to create a roadmap to a healthier, happier life.<BR><BR> Cowritten by functional medicine expert Dr. Navaz Habib, this book offers an approachable overview of recent research, easy-to-implement strategies, and more. With <i>Upgrade Your Vagus Nerve</i>, you’ll learn how to:<BR><ul><li>Understand the impact of psychological and physical stressors, such as traumatic incidents and nutritional deficiencies</li><li>Explore the intricate functioning of the vagus nerve and its connection to the parasympathe