OB Health Podcast
To sign up for my coaching: https://ob-health.com/Dr Jason Fung, the man who made intermittent fasting mainstream, went on The Diary of a CEO and said calories in, calories out is a myth, and that fasting is the simplest way to kill belly fat. As a fitness coach who's worked with over 1,000 clients, I have to break this down, because the whole thing rests on one idea that's just wrong: that insulin, not calories, is what makes you fat.Here's the truth: insulin's main job is lowering blood sugar, not storing fat (bodybuilders literally inject it to build muscle). You can eat 10,000 calories of butter, barely move your insulin, and still gain fat. And every version of fasting Fung recommends works for one reason only: it puts you in a calorie deficit. The catch he never mentions is muscle. Compared to a normal deficit, long fasts cost you more lean mass, wreck your hormones, and teach you nothing about nutrition. Strip his advice down and it's just "don't eat."I go through the insulin myth, the "your metabolism speeds up when you fast" claim (it doesn't), the leptin mix-up, and the one thing we actually agree on: fiber. Fasting can be a useful tool to stay in a deficit (I use a 16:8 window myself), but it is not magic, and it is not the reason you lose fat.CHAPTERS0:00 "The simplest way to kill belly fat" (Fung's claim)1:58 Insulin is NOT the fat-storage hormone (the butter test)2:08 The Twinkie Doctor who ate junk and lost 20 pounds2:52 The study that ends the insulin vs calories debate6:22 Fung got attacked for inventing modern fasting9:37 Your metabolism is driven by weight, not fasting (Eric Lee)10:13 The "starvation mode" myth and the 2,200-calorie claim13:40 What fasting actually is: say it with me, a calorie deficit14:04 The "just don't eat" consultation (advice with no substance)18:34 Fasting costs you muscle (the MrBeast problem)27:21 Where he's wrong about leptin29:23 Where we finally agree: fiber37:45 The verdict (and my 126g-of-fiber confession)Credit: original clip featuring Dr Jason Fung from The Diary of a CEO ("The Fasting Doctor" episode). Go watch the full episode on their channel.Want coaching that builds muscle and teaches you to actually eat, instead of just starving you? Apply to work with my team at OB Health: https://ob-health.com/If this helped, like and subscribe. I react to these every week.This channel is educational and is not medical advice. Talk to your doctor before fasting, especially if you are diabetic, pregnant, or on medication.Credit: original clip "The SIMPLE Way To Make Your Body KILL BELLY FAT! | Dr Jason Fung" by The Diary Of A CEO Clips. Watch it here: https://youtu.be/n6eFeUwodu8#drjasonfung #fasting #intermittentfasting #insulin #caloriedeficit #bellyfat #diaryofaceo #obesitycode #fatloss #OBHealth
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