Fasting, whether for health or religious reasons, can have powerful effects on the body. A 36-hour fast triggers several changes, with benefits reported by many, though experts remain divided on its overall value.
After just 4 hours, digestion stops and the body enters the catabolic phase, breaking down stored energy. At 8 hours, blood sugar drops, and glycogen is used for fuel. By 12 hours, fat starts converting into ketones, triggering metabolic switching and weight loss.
At 16 hours, autophagy begins—your cells clean out and repair themselves. By 24 hours, the body is in fat-burning mode, reducing inflammation and boosting insulin sensitivity. At 30 hours, growth hormone rises, preserving muscle and promoting healing. By 36 hours, deep cellular regeneration and maximum autophagy occur.
While promising, fasting can also have downsides like hunger, irritability, and increased gallstone risk. Effects vary, so it’s important to consult a doctor before trying extended fasting.