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Fasting Science

Understand the biology behind fasting. From autophagy and ketosis to hormones and cellular repair, learn what happens in your body during every phase of fasting.

What Happens After 12 Hours of Fasting What Happens After 16 Hours of Fasting What Happens After 24 Hours of Fasting What Happens After 36 Hours of Fasting What Happens After 48 Hours of Fasting What Happens After 72 Hours of Fasting Autophagy: Your Body's Cellular Recycling System The Science of Ketosis During Fasting How Fasting Improves Insulin Sensitivity Growth Hormone Surge During Fasting The Metabolic Switch: From Glucose to Fat Burning mTOR and Fasting: The Growth vs. Repair Balance AMPK: The Energy Sensor Activated by Fasting Sirtuins: The Longevity Genes Activated by Fasting BDNF: How Fasting Grows New Brain Cells How Fasting Triggers Stem Cell Regeneration How Fasting Synchronizes Your Circadian Rhythm The Molecular Science of How Fasting Reduces Inflammation Fasting and Telomere Length: Slowing the Aging Clock How Fasting Rejuvenates Your Mitochondria The 5 Phases of Fat Burning During Fasting How Fasting Reshapes Your Gut Microbiome Cortisol During Fasting: What You Need to Know Leptin and Ghrelin: Hunger Hormones and Fasting How Fasting Boosts Metabolism Through Norepinephrine How Fasting Reduces Oxidative Stress IGF-1 and Fasting: Why Lower Is Often Better Understanding Insulin Resistance and How Fasting Reverses It What Happens to Cholesterol When You Fast Hormesis: Why the Stress of Fasting Makes You Stronger The Science Behind Fasting and Blood Pressure Reduction Fasting and Cancer Prevention: The Science Can Fasting Prevent Cognitive Decline and Dementia? How Fasting Improves Liver Health Muscle Protein Synthesis During Fasting How Fasting Affects Thyroid Function The Science of Human Growth Hormone During Fasting How Fasting Changes Gene Expression Fasting and Brown Fat Activation How Fasting Clears Senescent 'Zombie' Cells How Fasting Enhances DNA Repair Fasting and Neuroplasticity: Rewiring Your Brain How Fasting Remodels Your Immune Cell Population NRF2 Activation: How Fasting Builds Your Antioxidant Defense Heat Shock Proteins: How Fasting Builds Cellular Resilience Complete Metabolic Timeline of a 72-Hour Fast The Three Types of Ketones Produced During Fasting Fasting, Uric Acid, and Gout: What to Know How Fasting Affects Sleep Architecture The Science of Exercise Performance During Fasting

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