Skip the wine & cocktails! When you have an alcoholic drink, you burn less fat, and more slowly than usual, because the alcohol is used as fuel instead. Knocking back the equivalent of about two martinis can reduce your body’s fat-burning ability by up to 73%. Alcohol contains 7 kcal/gram so even one small glass of wine will add up to unwanted pounds over a period of time. Beer in particular has a very high sugar content and is manufactured to keep you drinking more and more.