Fasting Science

Welcome to Fasting Science — where we explore what really happens inside the human body when you fast.

From the first few hours without food to 24-, 48-, and 72-hour fasts, we break down the science of fasting in a simple, visual and evidence-informed way.

You'll learn about:

• Fasting and metabolism
• Glucose, glycogen and insulin
• Fat burning and ketones
• Autophagy and cellular recycling
• Brain, liver, heart and muscle changes
• Intermittent and prolonged fasting
• Fasting myths and misconceptions
• What research actually shows — and what remains uncertain

No hype. No miracle claims. Just science explained simply.

Subscribe to understand what happens inside your body when you fast.