Three methods of<unk>  are time-restricted feeding, alternate-day<unk> , and periodic<unk> : * Time-restricted feeding involves eating only during a certain number of hours each day, often establishing a consistent daily pattern of caloric intake within an 8–12-hour time window. This schedule may align food intake with circadian rhythms. * Alternate-day<unk>  involves alternating between a 24-hour "fast day" when the person eats less than 25% of usual energy needs, followed by a 24-hour non-fasting "feast day" period. It is the strictest form of<unk>  because there are more days of<unk>  per week. There are two subtypes: * Complete alternate-day<unk>  (or total<unk>  energy restriction), where no calories are consumed on<unk>  days. * Modified alternate-day<unk>  (or partial<unk>  energy restriction) which allows the consumption of up to 25% of daily calorie needs on<unk>  days instead of complete<unk> . This is akin to alternating days with normal eating and days with a very-low-calorie diet. * Periodic<unk>  or whole-day<unk>  involves any period of consecutive<unk>  of more than 24 hours, such as the 5:2 diet where there are one or two<unk>  days per week, to the more extreme version with several days or weeks of<unk> . During the<unk>  days, consumption of approximately 500 to 700 calories, or about 25% of regular daily caloric intake, may be allowed instead of complete<unk> . The science concerning<unk>  is preliminary and uncertain due to an absence of studies on its long term effects. Preliminary evidence indicates that<unk>  may be effective for weight loss, may decrease insulin resistance and<unk>  insulin, and may improve cardiovascular and metabolic health, although the long term sustainability of these effects has not been studied.
Intermittent fasting
Calorie restriction
Very-low-calorie diet
Low-FODMAP diet
Alkaline diet
Specific carbohydrate diet
Low-carbohydrate diet
Ketogenic diet