Prolonged Fasting

Definition

Prolonged fasting is a type of fasting that extends beyond the typical daily fasting hours, usually lasting more than 24 hours, during which only water or non-caloric beverages are consumed.

Scientific / Technical Definition

Prolonged fasting involves the voluntary abstention from caloric food intake for a period exceeding 24 hours. During prolonged fasting, the body undergoes metabolic shifts, reducing glycogen stores, increasing fatty acid oxidation, and entering ketogenesis. This practice taps into the physiological processes that occur when the body is deprived of energy intake, enhancing autophagy, and potentially offering regenerative benefits and increasing stress resistance at the cellular level.

Benefits

• Enhanced weight loss
• Improved insulin sensitivity
• Increased autophagy which may aid in cell repair
• Improved cardiovascular health markers
• Potential increase in longevity

Examples

• 48-hour water fast
• 3-day fasting for spiritual or health reasons
• 5-day fast for metabolic resetting

Additional Information

• side effects: Potential side effects include dizziness, headache, and fatigue. It is not recommended for pregnant or nursing women, individuals with a history of eating disorders, or those with certain chronic health conditions without medical supervision.

Related Terms

• Intermittent Fasting
• Water Fasting
• Autophagy
• Ketosis
• Caloric Restriction

References

• Prolonged Fasting: Effects on Metabolism and Diseases
• The Benefits of Prolonged Fasting: A Review