And actually even better, if you go for three days without eating, it kicks in even greater longevity benefits. So there's a system called the autophagy system, which digests old and misfolded proteins in the body. And there's a natural cleansing that happens when you're hungry. Macroautophagy its name is but a good friend of mine, Ana Maria Cuervo at Albert Einstein College of Medicine discovered a deep cleanse called the chaperone mediated autophagy, which kicks in day two, day three, which really gets rid of the deep proteins.