Many people think fasting gets harder with time, but for many people the opposite happens. Around day 3, ketones rise, glycogen runs low, and the body shifts into a completely different metabolic state. The first 2-3 days are often adaptation. After that, extended fasting can feel surprisingly different 🔥 💬 This video isn’t sponsored. Some links are affiliate links — I may earn a small commission (at no extra cost to you). Thanks for supporting Practical Health! 🌐 More Fasting Center: Website – https://fasting.center Reddit - https://www.reddit.com/user/andtitov/submitted/ Facebook - https://www.facebook.com/groups/fastingsciencesupport TikTok – https://www.tiktok.com/@practical.health1 Instagram – https://www.instagram.com/practical.health Amazon Store – https://www.amazon.com/shop/practical.health 🔬 About the Channel I'm Andrey Titov — a PhD in Engineering, MIT alum, and lifelong data geek turned health enthusiast. I have three kids, a full life, and a constant drive to improve every aspect of my lifestyle. Over the years, I’ve come to believe that fasting is one of the most powerful tools in our health toolbox. That belief, combined with my love of data, led me to create this channel — a place to share real-world experiences and structured insights that can make fasting easier, smarter, and more effective for others.