Dr. Jason Fung’s fasting protocol typically includes intermittent fasting methods such as the 16/8 method (a 16-hour fast and an 8-hour eating window), 24-hour fasts once or twice a week. , or longer fasting hours, such as 48 or 72. The extra hours are often called extended fasting.
It is important to stay hydrated during fasting.
Drinking non-caloric beverages such as water, black coffee, and green tea may help. I like to slowly sip green tea. You can drink several cups of green tea during fasting. Green tea is a good source of hydration and can help reduce appetite due to its mild caffeine content.

Drinking a cup of hot green tea before your first meal is a gentle way to break your fast. As for bone broth, it’s a gray area. Traditional fasters believe that any caloric intake will break the fast. However, some fasting protocols (including some recommended by Dr. Jason Fung) allow a small amount of calories during the fast, usually from bone broth. The rationale is that minimal caloric intake does not significantly affect the overall metabolic state in the fasted state. Bone broth, especially one that has been boiled for 24-48 hours, is rich in nutrients and electrolytes that can support fasting nutrition and electrolyte balance.

Remember that everyone's body is different and responds to fasting in its own way. It is important to monitor the reaction of the body. If you experience dizziness, weakness, or discomfort while fasting, it is important to listen to your body's signals and consider breaking the fast or seeking medical attention. Finally, it is important to note that prolonged fasting (more than 24 hours) should be done with caution, preferably under the supervision of a health care professional or dietitian experienced in therapeutic fasting.