Actually I find that you keep adding water on 4ad from about 15 to 17 days so you would not notice a decrease in body fat. I was thinking the same thing then on about the 17th day I look in the mirror and I was noticably leaner. That period of water increase in the skin may be longer for some. Anyhow it confuses things somewhat I agree, and it's hard to monitor fat loss. If your uncomfortable with that then go without it, for me there is no way I could handle lethargy during a period where I have to turn up the intensity. I decided to trust in my diet (which I am very comfortable with) wait it out and it turns out my instincts were correct.