American Board of Surgery Qualifying Exam (ABS QE) Practice Test

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How many calories does dextrose provide per gram?

4 calories
3.4 calories
7 calories
9 calories

The correct answer is: 3.4 calories

Dextrose, a simple sugar and a carbohydrate, provides approximately 4 calories per gram. Carbohydrates, in general, are known to yield about 4 kilocalories per gram when metabolized. This is a standard measure used in nutritional science and dietetics, reflecting the energy content that carbohydrates can provide in the human body. The other options, while they are commonly associated with different types of macronutrients, do not accurately represent the caloric content of dextrose. For example, lipids provide about 9 calories per gram, while proteins also provide 4 calories per gram. Dextrose's caloric value aligns with the general caloric values for carbohydrates, affirming that it provides 4 calories per gram.