In human nutrition, how many kilocalories (kcal) does 1 gram of ethanol (alcohol) provide?

• A. 7 kcal per gram
• B. 0 kcal per gram
• C. 4 kcal per gram
• D. 9 kcal per gram

Answer: (A)

Verified step by step guidance

1. Understand that the energy content of macronutrients is measured in kilocalories (kcal) per gram, which indicates how much energy the body can obtain from consuming 1 gram of that substance.
2. Recall the common energy values for macronutrients: carbohydrates and proteins provide about 4 kcal per gram, fats provide about 9 kcal per gram, and ethanol (alcohol) provides a different value.
3. Recognize that ethanol is a unique macronutrient because, although it is not a nutrient required for bodily functions, it still provides energy when metabolized.
4. Use the known standard energy value for ethanol, which is 7 kcal per gram, to answer the question about how many kilocalories 1 gram of ethanol provides.
5. Confirm that the correct energy value for ethanol is 7 kcal per gram, distinguishing it from carbohydrates, proteins, and fats.