For example, by starving a mouse receiving chemotherapy or other targeted therapies, we protect normal cells and organs while making the therapy more toxic to cancer cells (see chapter 7); and by applying cycles of a fasting-mimicking diet to a mouse with an autoimmune disease, we reduce the number of autoimmune cells while also activating regeneration of the damaged tissues (see chapter 11). Preliminary results indicate that these strategies may also be effective in humans.