Some friends of mine told me about their religion and what is Ramadan ( keeping fast during the day , from sunrise till sunset) and I made some research.
People fast for religious and health reasons. The time for fasting can range from part of the day to several days or longer. Some fasts involve no eating food or drinking liquid. Other fasts involve drinking juices. Fasting can be difficult, but breaking a fast can be even harder, according to Health Recipes. Detoxification diets often include a fasting period followed by a strict diet of raw vegetables, fruits, fruit juices and water, according to the Nemour's Foundation. During a fast, your body does not take in sufficient energy and must break down skeletal muscle and convert it into energy. The first foods that you consume upon breaking a fast are critical to nourish the body, and should not expend much energy to digest and assimilate in the body. Raw fruit juices and fruits contain much water content and are easily digested and assimilated. Watermelon, grapes and apples are fruits that you can easily digest and assimilate, and they also provide nutrients and energy. Break your fast by drinking a cup of freshly squeezed fruit juice, followed by 2 cups of mixed fruit that consists of melon, grapes, apples and pears. Minimize citrus fruits at first since they may feel too acidic in your stomach. Drink a glass of purified or filtered water to rehydrate your body.