Calories in Food
Do All Foods Have Calories?
Yes. Except for water, all foods contain calories. The four main food types are: carbs, fat, protein and alcohol. Each of these food types contains a different number of calories per gram.
To determine the number of calories in a particular food, you need to know roughly how many grams of carbs, fat, protein and alcohol the food contains.
For calorie details of 2500 Foods, see Calories in Foods
Example of Calories in Food
For example, if a food contains 10 grams of protein and 4 grams of fat and 3 grams of water, then it contains 10 x 4 (40) protein-calories, 4 x 9 (36) fat-calories and zero water-calories (water is calorie-free), making a total of 76 calories.
Are All Calories in Food the Same?
Yes and No. Yes, if we take in more calories than we burn, these surplus calories will be stored as fat, no matter whether they are fat-calories, protein-calories or carb-calories.
That said, some types of food-calories are more easily converted to body fat than others.
For example, calories from fat are easily converted to body fat - only 3 percent of such calories are actually used up in the conversion process.
By comparison, carb-calories are less easily converted to body fat - up to 25 percent of these calories are used up in the conversion process.
Calories In Types of Foods