Juice fasting: Entails only drinking vegetable or fruit juice for a certain period.
Intermittent fasting: Intake is partially or completely restricted for a few hours up to a few days at a time and a normal diet is resumed on other days. A less well-know method, the origin of intermitten fasting, is called Circadian Rhythm.
Partial fasting: Certain foods or drinks such as processed foods, animal products or caffeine are eliminated from the diet for a set period.
Calorie restriction: Calories are restricted for a few days every week.