Hormones, which would normally be called in to help out are restricted by alcohol. That means their "glycemic load" is lower. (They require less insulin.) And if you add some good protein and fat (olive oil, perhaps) it lowers the glycemic load even more. If the dehydration was allowed to get far enough it will take a little longer to reverse it, but it will reverse if you just keep the liquid going down.
Their results were published in the Journal of Nutrition and Metabolism in July 2011.. We all know that coffee, soda, tea, etc., contain sugar, but they also contain caffeine. Now that you have that information, it's time to fix the damage. The levels of our glucofort have an affect on how hungry and how energetic we feel which is important if we wish to lose weight.