Valter Longo is a leading fasting researcher. Since the early 2000s, he’s been one of the top guys running legitimate fasting studies in cancer patients, regular people, and, of course, rodents. He’s gotten great results, elucidating the idea that fasting causes human cells and tissues to enter “survival mode” which allowed them to survive the withering effects of cancer treatment. I’ve cited many of his studies in previous posts. (This Mark's Daily Apple article was written by Mark Sisson, and is narrated by Tina Leaman)