Table 1.

Intermittent fasting protocols.

Type of Intermittent Fasting Protocol	Description of Intermittent Fasting Protocol
Time-restricted feeding	Commonly entails a daily fast for 12 to 20 h
Intermittent energy restriction	Involves an energy-restricted fast during intermittent periods, during which some energy-laden foods or liquids are consumed
Alternate-day fasting	Involves fasting for 24 h, followed by a regular eating pattern for the following 24 h
5:2 fasting	Consists of fasting on two non-consecutive days for every five days of regular intake
Fasting-mimicking diet	Includes some energy-laden liquids