Dr. Mark explains the difference between intermittent fasting, time restricted eating, and prolonged fasting. Intermittent fasting is an eating pattern, not a diet, that includes periods of not eating to switch to using fats and ketones. Time restricted eating compresses the eating window into a 6-8 hour period to allow for daily metabolic switching. Prolonged fasting is a longer period of not eating to induce cellular stress responses.
