5. Boosts Metabolism

  In addition to facilitating fat burning through ketosis, intermittent fasting has also been shown in research to boost your resting metabolic rate. This is the number of calories your body burns at rest.

Studies show short-term fasting for 18-48 hours can increase resting metabolism by up to 14%. This effect is thought to be due to the increased adrenaline and noradrenaline levels that fasting induces. The catecholamines norepinephrine and epinephrine increase calorie burn.

Intermittent fasting 23/1 causes small spikes in these catecholamines each day you fast. Over time, this can boost your daily energy expenditure even on non-fasting days. Increased resting metabolism means you burn more calories throughout the day with minimal effort.