What Happens to Your Body If You Eat NOTHING for 3 Days (Science Explained)
What actually happens inside your body if you don’t eat for 3 days?
Most people assume fasting is just about hunger. But once you stop eating, your body begins a sequence of metabolic changes involving blood sugar, insulin, stored glycogen, fat utilization, and ketone production.
In this video, we break down what happens to your body over 72 hours without food, step by step. You’ll learn how your body shifts from using glucose to stored energy, how hormone levels respond, and how metabolism adapts during short-term fasting.
This video is for educational purposes only and does not recommend prolonged fasting.
If you enjoy science-based videos about fasting, metabolism, fat loss, and how the body works, subscribe to Health Insight for clear, visual explanations.
Understand your body. Improve your health.
Research & Studies:
Harvard T.H. Chan School of Public Health.
National Institute on Aging.
Cleveland Clinic – Fasting & Metabolism.
NIH – Energy Balance & Metabolism.
#fasting #72hourfast #healthinsight #metabolism