Fasting Glossary

Understanding the science behind fasting doesn't have to be complicated. This glossary explains the key terms you'll encounter throughout OneYearFast.com in clear, straightforward language.

Whether you're new to intermittent fasting or exploring extended fasting, these definitions will help you understand what happens inside your body during a fast.

Key Terms

Autophagy

The body's natural process of breaking down and recycling old or damaged cellular components. Often described as the body's internal "clean-up" system, autophagy helps maintain healthy cells and is influenced by nutrient availability.

Ketosis

A normal metabolic state in which the body produces ketones from stored fat to use as an alternative source of energy when carbohydrate availability is reduced.

Lipolysis

The process by which stored body fat is broken down into fatty acids and glycerol, providing fuel for the body.

Insulin Sensitivity

A measure of how effectively the body's cells respond to insulin. Higher insulin sensitivity allows glucose to move more efficiently from the bloodstream into cells.

Metabolic Flexibility

The body's ability to efficiently switch between burning carbohydrates and burning fat depending on energy availability and activity level.

Learn More

Each term has its own detailed guide explaining the science, current research, and how it relates to fasting.

• What is Autophagy?
• What is Ketosis?
• What is Lipolysis?
• What is Insulin Sensitivity?
• What is Metabolic Flexibility?

OneYearFast.com explores these concepts through both scientific research and my own year-long fasting journey, using medical testing, wearable technology, and real-world observations. Follow along on the live dashboard.