Meanwhile, regular beer is produced from starch and can contain upwards of 12 grams of carbs in just one can. Many alcoholic beverages are loaded with carbs, some varieties packing over 30 grams in a single serving. Watch out for common mixers like juice, soda, sweeteners and energy drinks — they can quickly turn a carb-free drink into a high-calorie carb bomb. Wine and light varieties of beer are also relatively low in carbs — usually 3–4 grams per serving.