We spend 93% of our lives indoors, running our biology on the wrong operating system. The result is what Dr. John La Puma calls Digital Obesity: a biological mismatch that drives chronic inflammation, burnout, brain fog, poor sleep, impaired immunity, addiction, metabolic dysfunction, and contributes to heart disease, diabetes and stroke.

John La Puma, MD, is a board-certified internist, two-time New York Times bestselling author, and professionally trained chef who reviewed 2,200 peer-reviewed studies to find the right dose of nature for your specific condition and hundreds of ways to get it.

His core prescription is surprisingly simple. Repurpose just two of the incidental hours you already spend outside each week and gain measurable longevity. Repurpose five hours and you can improve your healthspan by up to six years. No supplements. No gadgets. No new time required. Just specific, intentional targeted time outside.

Inside, you will learn how to reverse Digital Obesity by correcting the biological mismatch that disrupts brain regulation, attention, and weight. You will discover how to use light and temperature as information for your body to anchor your circadian rhythm and strengthen immunity. And you will find a practical, medication-free framework to help kids reclaim mood and focus. You'll hear about Outdoor Rx, and the 7% Solution, designed to help you heal.

Whether you are a burned-out professional, a worried parent or caregiver, or someone who simply wants to sleep better, see more clearly, and think more sharply, Indoor Epidemic is the medical-grade roadmap grounded in biology, not belief.