Intermittent fasting, or IF, focuses on eating within a specific time frame and limiting calorie intake for the remainder of the day. Unlike traditional diet practices, intermittent fasting does not prohibit any food group; instead, it concentrates on the timing of meals. However, like any dietary approach, intermittent fasting may not be suitable for everyone. Its applicability can be influenced by an individual's age, current health status, medications, and daily living conditions.

What is Intermittent Fasting?

Intermittent fasting, or the IF diet, is a dietary regimen planned with periods of the day allocated for eating and times where no calories are consumed. The aim is to complete meals within a certain time frame and avoid calorie-containing foods and drinks for the rest of the day.

In addition to being a meal timing approach, intermittent fasting is not a standalone diet list. People practicing intermittent fasting may encounter unexpected issues if they focus solely on time without considering meal content. For example, consuming highly caloric, fiber-lacking, high-sugar foods during the feeding window can exacerbate digestive complaints or cause fluctuations in blood sugar levels.

How to Do Intermittent Fasting?

Intermittent fasting is a dietary regimen based on planning eating hours during the day. In this approach, meals are consumed within a set timeframe, while calorie-containing food and beverages are avoided for the rest of the day. 

During the application process, the feeding window and fasting window should be clearly defined; attention should be paid to water intake during fasting. When creating an intermittent fasting plan, it should be tailored to the person's age, general health status, daily lifestyle, and eating habits. Since this dietary regimen may not be suitable for everyone, individuals with chronic diseases or those using regular medication are advised to consult a healthcare professional before starting.

What Are the Intermittent Fasting Hours?

Intermittent fasting hours are structured around the time frame during which eating takes place and the duration where calorie intake is limited. These hours should be determined by considering an individual's sleep pattern, work schedule, and daily life habits. Although different hourly models exist in intermittent fasting practices, the most common arrangements focus on eating during a specific part of the day and avoiding calorie-rich food and beverages during the remainder. 

When scheduling time, it is important to note that prolonged fasting periods may not be suitable for everyone, and a sustainable and adaptable routine should be chosen. 

What Can Be Consumed During Intermittent Fasting?

Since the main goal during the fasting phase is to limit calorie intake, calorie-free beverages may be preferred during this period. Water, unsweetened tea, and unsweetened herbal teas are among the drinks that can be consumed in the fasting window. Some people may opt for unsweetened black coffee if it can be tolerated.

During the feeding window, it is important to ensure an adequate and balanced meal plan. A diet consisting of vegetables, protein sources, whole grains, and healthy fats may be preferred during this time. 

Limiting excessively fatty, sugary, and highly processed foods can help maintain gastrointestinal comfort and overall nutritional balance. Individual needs and health status should be considered during intermittent fasting, and those with specific dietary needs are advised to consult with a healthcare professional before starting.

What Are the Advantages of the Intermittent Fasting Diet?

The intermittent fasting diet is regarded as an approach that can simplify meal planning for some individuals. However, benefits may vary based on personal health status and life conditions.

  • It can help regulate meal timing.

  • It may limit late-night food consumption.

  • It can increase meal awareness.

  • It can simplify daily meal planning.

Intermittent fasting diet is not suitable or necessary for every individual. Potential benefits should be considered along with personal health status.

Frequently Asked Questions

How are intermittent fasting hours determined?

When planning hours, sleep patterns, work hours, and lifestyle should be considered. Since long fasting periods may not be suitable for everyone, a sustainable time frame should be chosen.

Can coffee or tea be consumed during intermittent fasting?

Calorie-free beverages can be chosen during the fasting window. Unsweetened tea and, if tolerable, unsweetened black coffee can be consumed by some individuals. Sugary and additive drinks should be avoided in the intermittent fasting diet list.

How long should intermittent fasting be practiced?

The duration of intermittent fasting varies from person to person. The duration and form of practice should be evaluated in accordance with the individual's health status and living conditions.

Can exercise be done during intermittent fasting?

Exercise should be planned according to the person's general health status and energy level. Intense physical activities during the fasting period may cause dizziness in some individuals. Therefore, exercise timing should be assessed individually.

Creation Date : 19.12.2025
Update Date : 23.12.2025
Author : Yeliz YİĞİT
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