In the context of energy in food, how many kilocalories (kcal) are provided by 1 gram of carbohydrate?

• A. 7 kcal
• B. 9 kcal
• C. 2 kcal
• D. 4 kcal

Answer: (D)

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 nutrient.
2. Recall the standard energy values for the three main macronutrients: carbohydrates, proteins, and fats. These values are commonly used in nutrition to estimate energy intake.
3. Identify that carbohydrates provide approximately 4 kcal per gram, which means that when you consume 1 gram of carbohydrate, your body can obtain about 4 kilocalories of energy.
4. Compare this value with the other options given (7 kcal, 9 kcal, 2 kcal) and recognize that 4 kcal is the accepted standard energy value for carbohydrates.
5. Conclude that the correct energy value for 1 gram of carbohydrate is 4 kilocalories, which is essential knowledge for calculating energy intake from food.