Couple reasons! First, perhaps you’re using too much salt or too many spices. Be careful of spices and bouillon cubes that are consumed. MSG will make you retain water for as long as 4 days. Continue drinking 8-10 glasses of water with this diet, it does work. Or, perhaps you’re adding things, like butter to your veggies. Instead of butter, try Pam Butter Spray instead. Butter contains a lot of excess calories and fat. Are you adding sugar to your fruits? Try a low calorie sweetener instead. Also, try to cut sugar where you can. Juice can be full of sugar, so omit that this week, too. And no diet soda!