What is the term for an eating pattern that involves consuming no calories on fasting days followed by a day of feasting?

The term that best fits the description of an eating pattern characterized by consuming no calories on fasting days followed by days of feasting is "alternate day fasting." This approach typically involves a cycle where individuals alternate between days of full fasting and days where they can eat freely. The structure of this eating pattern is designed to promote metabolic benefits and weight loss by creating a significant caloric deficit over time.

Understanding this definition is crucial, as alternate day fasting specifically prescribes days of complete fasting contrasted with days of unrestricted eating, differentiating it from other related terms. For example, "intermittent fasting" is a broader concept that encompasses various methods, including time-restricted eating, but does not specifically refer to alternation between fasting and feasting days. Similarly, "periodic fasting" and "alternate day modified fasting" might imply different structures or limitations on caloric intake that don't align with the complete fasting followed by unrestricted eating described in the question.

By grasping the precise terminology, one can appreciate how different fasting methods apply to nutritional strategies and weight management, making alternate day fasting a specific and recognized method within the broader context of dietary practices.