Category: Prolonged fasting

According to a 2019 study, a prolonged fast lasting four to 21 days caused a reduction in blood sugar and improved feelings of physical and emotional well-being. This metabolic shift is achieved through several distinct phases. Let’s explore what are the stages of a long fast, outlining the physiological changes your body undergoes as it adapts to fuel itself without food.

A 2024 study in *Nature* revealed that during extended fasts, profound systemic changes affecting thousands of proteins across multiple organs typically emerge after 72 hours. This means **what happens after 4 days of fasting?** is a question that points to a peak period of significant metabolic and cellular transformation.