You are the one who has not researched Water Fasting Taknamak. It is precisely the introduction of anything other than water that will starve the body of nutrients, not keep you alive as some doctors would have us believe.
What does a bear live on when it hibernates through the winter? What does a crocodile live on when the water hole dries up and it buries itself in the mud beneath for sometimes in excess of two years? Not Sugar free lollies, not chocolate tidbits to keep it alive. They are fasting as nature intended, their bodies, like ours, using the stores in their bodies to continue their existence in systems designed to do just that.