You’ve been told your body is the problem. That your metabolism is slow, your willpower is weak, your diagnosis is permanent. But what if none of that is true? In Environment First, Dr. Eric Berg turns the modern health conversation on its head. Drawing on decades of clinical experience, he reveals a radical but deeply intuitive truth: your body isn’t malfunctioning—it’s responding exactly as it was designed to, in an environment it was never meant to survive. Through eye-opening patient stories and clear, compelling science, Dr. Berg shows how everyday conditions—artificial light, ultra-processed food, chronic sitting, chemical exposure, digital overload, and social isolation—are quietly reshaping your hormones, metabolism, immune system, and mood. The result? Fatigue, weight gain, brain fog, anxiety, and chronic disease that seem to appear out of nowhere but are anything but random. This is not a diet book. It’s not a willpower test. And it’s not about adding more rules to your life. Instead, Dr. Berg introduces the Environment First principle: change the signals around you, and your biology will change with them. No hacks. No extremes. Just a smarter way to work with your body instead of against it. Organized around eight key environments—from food and light to movement, microbiome, and social connection—this groundbreaking book gives you a clear framework to identify what’s actually driving your symptoms and how to fix it at the source. Smart, empowering, and refreshingly practical, Environment First offers a new path forward: one where health isn’t something you chase—it’s something your body naturally returns to when your world finally makes sense.