Fasting for 72 hours can reset your entire immune system (The Source)

The Source featured research by Valter Longo of the USC Leonard Davis School on how fasting for three days can improve a person’s health. The six-month study was done on subjects going through chemotherapy. “When you starve, the system tries to save energy, and one of the things it can do to save energy is to recycle a lot of the immune cells that are not needed, especially those that may be damaged,” Longo said.