Even though your goal is just to lose 5 pounds in a week, you should be strict with what you do so as not to inadvertently undo all your hard work for vegetarian weight loss. In fact, I always suggest to those overweight vegetarians to keep to a max of 4 pounds a week so you won't suffer loose skin post weight loss. Many people don't have the time to weight themselves every day, but checking the scale on a regular basis can definitely help when you're working to lose weight and keep it off.