Calorie restriction means reducing average daily caloric intake below what is typical or habitual, without malnutrition or deprivation of essential nutrients. In a fasting diet, a person does not eat at all or severely limits intake during certain times of the day, week, or month.
Description Calorie restriction is a consistent pattern of reducing average daily caloric intake, while fasting regimens primarily focus on the frequency of eating. The fasting diet may or may not involve a restriction in the intake of calories during non-fasting times. There are a variety of fasting diets, sometimes called "intermittent fasting." You may have read about: Time-restricted feeding—Meals are consumed within a limited number of hours (such as 6-8 hours) each day, with nothing consumed during the other hours. Alternate-day fasting—Eating is unrestricted every other day, and no or minimal calories can be consumed on the days in between. 5:2 eating pattern—Eating is unrestricted for 5 straight days each week, followed by 2 days of restricted caloric intake. Periodic fasting—Caloric intake is restricted for multiple consecutive days, such as 5 days in a row once a month, and unrestricted on all other days. https://www.nia.nih.gov/health/calorie-restriction-and-fasting-diets-what-do-we-know