To drink water? You can drink water during fasting. I'm presuming your trying to lose weight in fat, but maintain / increase muscle? It's hard for me to drink a lot of water when I am completely empty of food. This is mainly a problem I have in the morning. I'm really tempted to buy/build a carbonation machine. Bubble water is really easy for me to drink. Sean will probably know exactly what I am talking about as I know he loves his sparkling water too. And with my metabolism going so crazy it is really hard to make healthy eating choices. 1 large chicken breast 2 cups of veg and a cup of rice barely keeps me full for 2 hours. Only extremely heavy foods keep me full, and then I'm not being really healthy for most of my meals. How often you eat, and what you eat does not effect your metabolism. Metabolism is effected by body-weight, exercise, and weight loss. I'm not sure how junk food is more filling then whole foods, unless your simply not getting enough calories from the whole foods in comparison to the junk food. I'm going to ask this because I want to make sure you are really stating something that I have never ever heard before in the world of nutrition.You hypothesize that the foods you eat, and how frequently you eat them, does not change your metabolism?