Note: Losing weight quickly can be dangerous. You cannot lose five pounds of fat in one day, so most of the weight you lose will have to be water weight. Losing five pounds of water weight can cause dehydration. Your risk of dehydration is greater the lower your body weight because you have less total water to lose. Key Points: * Your body stores carbohydrates with water * Salty foods cause water retention * High fiber foods absorb water in your gut Avoid Carbohydrates * Candy * Sugary sauces * Syrups * Cakes, pastries, pies * Bread * Most cereals * Candy bars and granola bars * Sweetened drinks Avoid Fiber * Oats * Sweet potato * Beans * Lentils * Nuts * Avocado * Most fruits and vegetables Avoid High-Salt Foods * Salted nuts * Full-sodium soups * Pretzels * Chips * Soy sauce * Most fast food (hamburgers, french fries, etc.)