How many calories are found in a vitamin?

Vitamins are organic compounds that are essential for various metabolic processes in the body. They do not contain calories because they are not a source of energy. Instead, vitamins assist in numerous bodily functions, such as supporting the immune system, promoting healthy skin, and playing vital roles in cellular processes.

Unlike macronutrients such as carbohydrates, proteins, and fats, which provide energy measured in calories, vitamins do not contribute to caloric intake. Thus, when considering how many calories are found in a vitamin, the correct understanding is that they provide zero calories, making the choice of zero the only accurate answer.