What If You Ate 20,000 Calories and Stayed Thin?

What if you burned 20,000 calories a day? That's about eight large pizzas. Every single day. And you'd still be hungry. Meet Leo. His metabolism runs 10x faster than normal. He's never cold, he heals overnight, and he can eat anything without gaining weight. Sounds like a superpower, right? But there's one rule. His engine got ten times bigger. His fuel tank did not. Miss one meal, and his body starts running on empty in just hours. So what happens when Leo gets stuck in a blizzard with his little sister, minus eighteen degrees outside, and only two honey packets left? In this video: • How many calories your body really burns in a day • Why a resting human gives off as much heat as a light bulb • Why marathon runners "hit the wall" and what glycogen is • Why your brain uses 20% of your energy • What would really happen if your metabolism was 10x faster A furnace is only useful if someone's cold. What's the first thing YOU would eat with a 10x metabolism? Tell us in the comments. Subscribe for more What Ifs: new powers, new stories, real science. This video is a fictional animated story inspired by real science. It is not medical advice. #WhatIf #Metabolism #Science