Once you realize digestion takes a lot of energy to convert your food into energy, it makes more sense. Every night when you go to sleep your body has durations of detoxification. It’s almost impossible to completely detoxify when your constantly putting toxins in your body daily. By refraining from eating for two weeks that minimizes the toxins coming in. Also all the energy you normally would you use for digestion, you can now use it to cleanse your body. Your body is composed of 75 trillion cells. These cells can get up and got to the bathroom or go to the kitchen for food. They are surrounded by interstitial fluid( 80% lymphatic fluid and 20% blood) these cells create cellular waste, digestive waste and so on. Your lymphatic system is like your sewage system. It removes 95% of your toxins. The toxins are carried by your lymph fluid to the adrenal glands, little triangle glands on top of your kidneys. Then through your kidneys where you will pee it out. These cells eventually will go bad, while fasting your basically consuming your own body. It will get rid of all the damaged and weak cells.
After not eating your body will start to look for food. It will first dip into your digestive track which is mostly waste by that point. It will then start breaking down your muscle tissue for food, which is not ideal or efficient. After 3-5 days your body will then realize that’s not the most effective way to get energy. It will then start breaking down your fat, everyone has a least 2.5% body. Inside that fat is stored essential nutrients for when you can’t get to food. Starvation mode. So, now I’m getting nutrients and water without having in ingest many toxins as well as using all my energy to cleanse itself.