Everything Korean today is a trend. Among all these trends, there is a Korean diet which is going viral because it claims for a rapid weight loss, that too in just 4 weeks!The diet came on the program called "Switch On Diet", which is created by Dr Yong-Woo Park, known for treating obesity for the last 33 years. The diet "aims to return metabolic abnormalities to normal weight through 4 weeks of practice". The diet claims to promote fat loss and muscle mass retention. So, What Is This Switch On Diet?This diet focuses on intermittent fasting and gut health optimization. The diet mainly comprises of protein-heavy meals and also emphasizes on hydration, notes New York Post. Rule Of Thumb For Switch On DietThe basic rules include:Drink eight glasses of water or two litres of waterGet at least six hours of sleepConsume nutritional supplementsPractise 10-14 hours of intermittent fastingPerform high-intensity workouts at least four times a weekHave dinner at least 4 hours before bedtimeThe program also advises against coffee intake and suggests that one must limit caffeine and alcohol consumption, along with processed food and sugar. The diet also restricts carbohydrates to allow the body to enter a state of ketosis, which is a metabolic state characterized by rapid levels of ketone bodies in the body tissues, which are pathological in conditions, such as diabetes, or the consequence of diet which is very low in carbohydrates. This is when your body burns fat for energy instead of glucose. How Can You Follow This Diet, Weekly?Here's a weekly overview of how this diet could be followed:Week 1 - Detox And Gut CleansingThe first week focuses mainly on detoxing your body and cleansing your gut. Participants in this phase thus consume protein shake four times a day, for three days. Probiotics too play an essential role by emptying stomach. This is also followed by at least an hour of walking. What Is Allowed: Cabbage, cucumbers, broccoli, tofu, and unsweetened yogurt. Participants can also consume fish, chicken, pork, eggs, low-fat meat. However, flour, dairy and coffee are not allowed. Week 2 - Intermittent FastingDuring the second week, participants start fasting for one day, for a total of 24 hours. This fast is broken with a high-protein dinner. The meal afterwards include a daily lineup of two protein shakes, low-carbs meal, which also includes rice, vegetables, and a no-carb dinner, which is high in protein. What Is Allowed: White rice, legumes, and a cup of black coffee. This phase mainly focuses on muscle recovery, and so high-intensity workouts are avoided during this time. Week 3 and 4 - Fat BurnIn the last two weeks is when the diet goes in its full fledged mode. This is when the focus is solely on the fat-burning process. The week 3 is started with two non-consecutive 24-hour fasting periods. In week 4, these fasting days are up by one extra. What Is Allowed: Two shakes a day and two low-carbs meal. You can have pumpkins, cherry tomatoes, chestnuts, and berries. Post-exercise, carb-dense foods like sweet potatoes and bananas are encouraged. Maintenance is the keyEven after the program is finished, it is important that people maintain their results with a 24-hour fast and a 14-hour fast window once a week.