Which nutrient provides the most calories per gram?

• A. Fat
• B. Alcohol
• C. Protein
• D. Carbohydrate

Answer: (A)

Verified step by step guidance

1. Understand that calories per gram indicate the amount of energy provided by each gram of a nutrient when metabolized by the body.
2. Recall the caloric values for each nutrient: carbohydrates and proteins provide 4 calories per gram, alcohol provides 7 calories per gram, and fat provides 9 calories per gram.
3. Compare these values to determine which nutrient yields the highest energy per gram.
4. Recognize that fat provides the most calories per gram because it has the highest caloric value among the options.
5. Conclude that fat is the nutrient that provides the most calories per gram based on this comparison.