Renaissance of Biological: A Comprehensive Analysis of Fasting and Human Health
The For centuries, fasting was viewed primarily through a religious or spiritual lens—a practice of self-discipline, penance, and devotion. However, in the last two decades, clinical research and molecular biology have redefined fasting as one of the most potent non-pharmacological interventions for human health. Far from being a state of "starvation," fasting triggers a sophisticated survival mechanism that optimizes cellular function, resets metabolic pathways, and promotes longevity. This article explores the multi-dimensional impact of fasting on the human body, from the microscopic level of cellular repair to the macroscopic level of organ systemic health. 1. The Metabolic Switch: From Glucose to Ketones The most immediate effect of fasting is the "metabolic switch." Under normal dietary conditions, the body relies on glucose (sugar) from carbohydrates as its primary fuel source. Excess glucose is stored in the liver and muscles as glycogen. Wh...