Starting an extreme fast of more than 48 hours requires caution and preparation. Here are some tips to help you get started safely: 1. **Suitability Assessment**: Before you start, make sure you are in good physical condition for such a fast, especially if you have any health problems (such as diabetes, heart disease, etc.) or are taking medication. It is best to consult a doctor first. 2. **Gradually adapt**: If you have not done a long fast before, you can consider gradually increasing the length of the fast. For example, try a 16-hour or 24-hour fast first and gradually increase to 48 hours. 3. **Stay hydrated**: During the fast, make sure you drink enough water. Water not only helps you stay hydrated, but also reduces hunger. 4. **Prepare for a diet**: In the days before starting the fast, maintain a healthy diet and avoid foods high in sugar, salt, and fat. Increase your intake of vegetables, fruits, and protein to help your body better adapt to the fast. 5. **Plan a start time**: Choose a relatively relaxed time to start the fast so that you can effectively deal with hunger and other discomforts that may arise during the process. 6. **Distract yourself**: During the fast, do some relaxing activities (such as walking, reading, or meditation) to help distract you and reduce your cravings for food. 7. **End the fast**: When you end the fast, do not eat heavy food immediately. Try some easily digestible food (such as soup, juice, or bananas) first, and then gradually return to your normal diet. 8. **Pay attention to your body's reactions**: During the fast, pay attention to your body's reactions. If you experience severe discomfort, such as dizziness, palpitations, or extreme fatigue, it is recommended to stop fasting immediately. Remember that fasting is not suitable for everyone, and it is most important to control your body and feelings and follow a healthy lifestyle.