I went through those periods quite frequently. Don't let it go on for a long period of time, because the weight loses can add up. If you are going through try to make calorie packed snacks, to atleast keep up the calorie count. They have a few products out now that can help with that. Scandishake, Scandical (powder like the scandishake but not flavored) The scandishake is a powder that you are supposed to mix with milk and it creates a drink (chocolate, strawberry, and vanilla flavors) those are good by themselves, plus add them to icecream and make a shake. They should help. Talk to your doctor if you are really concerned though.~Candice