What 40 Days Without Food Reveals About the Human Body, With Casey Ruff

In the 1960s, researchers had people fast for 40 days straight. They expected some of them to die. Instead, their bodies adapted. My guest this week, Casey Ruff, has spent nearly two decades helping people understand what's actually fueling their bodies, and most of what he's found runs against everything we've been taught. A metabolic health coach who came up through lab testing before going all in on low-carb and carnivore approaches, Casey joins me to explain why the carbs you've been told you need for energy might be the very thing holding you back. Casey and I talk about research that rewrote his thinking. Why nearly every diet eventually fails. And, most importantly, how your body is built to run on fat far better than you'd expect. "Every diet fails. You do a diet and sure, you're going to lose weight, but after a while, your cravings get bigger, and your energy starts to go down." ~ Casey Ruff Support the show and get 50% off MCT oil with free shipping—just leave us a review on iTunes and Spotify and let us know! https://podcasts.apple.com/us/podcast... In This Episode: 00:00 Meet Casey Ruff 02:43 Growing up in Salt Lake and the fight that changed everything 06:51 The coach who fed Ironman athletes bacon and butter 11:16 VO2 max testing and learning to burn fat 15:30 What 40-day fasting studies revealed about ketosis 21:03 How your body runs on stored fat 24:00 Fat adaptation and how long it really takes 26:42 What counts as low carb, and finding your number 31:22 How to actually measure ketosis 34:08 Should you flex in and out of ketosis? 38:05 The Cholesterol Code, LDL levels, and heart health 46:27 Why people do everything right and still struggle 51:06 Strength training and longevity 54:17 Wrap-up questions and where to find Casey Ruff Resources Mentioned The Obesity Code by Dr. Jason Fung: https://www.amazon.com/Obesity-Code-U... The Cholesterol Code: https://www.amazon.com/Cholesterol-Co... Toxic Superfoods by Sally K. Norton: https://www.amazon.com/Toxic-Superfoo... About Casey Ruff Casey Ruff is a metabolic health coach who has been a certified personal trainer since 2007 and has helped thousands of clients transform their health through movement, nutrition, and lifestyle. He came up running metabolic testing programs before specializing in low-carbohydrate, ketogenic, and carnivore approaches. After being laid off during the 2020 pandemic, he and his wife Bethany started Boundless Body, the coaching company they run together out of South Jordan, Utah, where he also hosts the Boundless Body Radio podcast. Connect with Casey Ruff Instagram:   / caseyboundlessbody   LinkedIn:   / casey-ruff-38318a1b1   Website: https://www.myboundlessbody.com/ Connect with Chris Burres Website: https://www.myvitalc.com/ Website: http://www.livebeyondthenorms.com/ Instagram:   / chrisburres   TikTok:   / myvitalc   LinkedIn:   / chrisburres   Disclaimer The content shared in this podcast is intended for educational and informational purposes only. It does not constitute medical advice of any kind, nor does it include any specific claims or guarantees. The views expressed are based on personal experiences, research, and individual perspectives, and are meant to inspire and inform listeners on topics related to wellness, lifestyle, and personal development. We strongly encourage all listeners to consult with a qualified professional or licensed expert before making any decisions related to health, finances, or other sensitive areas of life. Thank you for tuning in—and for taking proactive steps toward a more informed, intentional life.