This patient support community is for discussions relating to dieting,
alcohol and dieting, balanced menus,
diabetes, success stories,
exercise,
metabolism,
healthy dieting, healthy snacks, holiday tips, and nutrition. Also covered are discussions relating to specific diet plans like the South Beach Diet, Atkins Diet, Slim-Fast, Weight Watchers, Counting Calories, Fat Flush, Body for Life and others.
As for where calories come from... You can find products that have zero carbohydrates, but are still pretty high in calories. A calorie is actually a measure of energy. Basically, everything you eat requires a certain amount of energy to "burn" it completely. Different types of ingredients take more energy for your body to process completely.
The link below may help in finding the nutritional values you're looking for-
http://www.calorieking.com/foods/calories-in-cider-wine_c-Y2lkPTQwJnBhcj0.html