Health is not simply the absence of disease. Health is an active state. Your body has within it five health defense systems: angiogenesis, stem cells, the microbiome, DNA protection, and immunity. These systems are responsible for maintaining our health and resisting the regular hazards we all face everyday as part of ordinary life—and they heal us when disease inflicts damage in our body. By knowing how these systems defend your body like a fortress, you can tap into their health powers to live a longer, healthier life. Today on The Dhru Purohit Podcast, Dhru talks to Dr. William Li, an internationally renowned physician, scientist, and author of the New York Times bestseller Eat to Beat Disease: The New Science of How Your Body Can Heal Itself. His groundbreaking work has led to the development of more than 30 new medical treatments, and impacts care for more than 70 diseases including cancer, diabetes, blindness, heart disease, and obesity. His TED Talk, “Can We Eat to Starve Cancer?” has garnered more than 11 million views. Dr. Li has appeared on Good Morning America, CNN, CNBC and the Dr. Oz Show, and he has been featured in USA Today, Time Magazine, The Atlantic, and O Magazine. He is president and medical director of the Angiogenesis Foundation and is leading research into COVID-19.