Harness the power of vagus nerve (VN) function and heart rate variability (HRV) in the long-awaited follow-up to bestseller Activate Your Vagus Nerve 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.

Cowritten by functional medicine expert Dr. Navaz Habib, this book offers an approachable overview of recent research, easy-to-implement strategies, and more. With Upgrade Your Vagus Nerve, you'll learn how to:

• Understand the impact of psychological and physical stressors, such as traumatic incidents and nutritional deficiencies
• Explore the intricate functioning of the vagus nerve and its connection to the parasympathetic nervous system and the microbiome-gut-brain axis
• Learn how to measure vagus nerve function using heart rate variability (HRV) and other devices
• Discover a wide range of strategies to upgrade your HRV/VN tone, including non-invasive electrical stimulation, breathwork techniques, nutritional optimization, sound therapy, temperature exposure, circadian biology alignment, and more