Read Dr. Shelton's book. All animals on the planet are born with a program not to eat everyday. If they encounter a day or week when they have no food, body goes into Ketosis and uses all junk in the body to generate much needed energy and uses fat as fuel as well. Another of natures program in all leaving things.
Hmmm! Sounds more healthy to me. Humans learned to store and process foods, invitation to health problems.
Yes, try 3 days of nothing but water (thus the name of the forum) and stay in tune with your body, you will know some cleaning and clarity of mind will happen.
Curiosity is the beginning of learning. A good thing.