Dr. Navaz Habib is the founder of Health Upgraded, a functional medicine and health optimization clinic in Toronto, Canada, working with high-performing professionals, athletes, and entrepreneurs to dig a little deeper and find the answers to what is holding back their health. He works with those who want to take their health to a higher level, allowing them to contribute to humanity and serve more people. Having gone through his own personal experiences with poor health and weight struggles, Dr. Habib is well equipped to implement personalised recommendations for each of his clients. In identifying the root causes of health imbalances and addressing them naturally, his patients experience optimal health the way their bodies were meant to feel; this allows them to give back to the world in whatever way they want to serve. Dr. Habib's book Activate Your Vagus Nerve is a simple-to-follow guide to help you identify and address a major missing piece in dealing with chronic health concerns such as anxiety and depression. By activating the vagus nerve, you can optimise your productivity, focus, and energy levels, allowing you to experience the effects of upgraded health. J. P. Errico is a highly accomplished individual with a diverse range of expertise as an executive, entrepreneur, and inventor. He currently serves as a board member and founder of ElectroCore, a prominent company specialising in neuromodulation that has developed a pioneering non-invasive vagus nerve stimulator. J. P. has been credited as an inventor on over 250 issued US patents, and has founded and successfully sold or taken public numerous medical device and pharmaceutical companies in partnership with Dr. Thomas J. Errico, including Fastenetix, K2 Medical Systems, AD4-Pharma, E2, and SpineCore. He earned an undergraduate degree in aeronautical engineering from the Massachusetts Institute of Technology and worked at the Air Force National Laboratory's Lincoln Laboratories. Additionally, he holds graduate degrees in both law and mechanical/materials engineering from Duke University.