What's the Science to Fasting?

We need to build up and we need to break down. We can't always building we can't always be breaking down. Our gut is also a machine, so it needs rest in order to have the cleaning crew come in to clean up what was left behind. Same thing with ourcells, like what you're talking about atophagy or or mitogy. Each cell has a different life span, but we need to actually be able to break down cells in order to create new cells that are healthy again.