Do you know that drinking zero-calorie diet drinks increases your hunger and cravings? The increased hunger causes increased caloric intake. I read about it online.
If you are getting frustrated with a weight-loss plan but still drinking diet drinks – this might be why your plan is not working out like you thought it would. If you switch to plain water when you are thirsty, this report about diet drinks suggests that you are much better off drinking water than drinking diet drinks.