Which macronutrient provides 9 kcal per gram?

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Prepare for the TCC Nutrition 101 Test. Study effectively through multiple choice questions with hints and explanations. Ensure you're ready for your exam!

Multiple Choice

Which macronutrient provides 9 kcal per gram?

Explanation:
Fat provides the most energy per gram among the macronutrients, about 9 kilocalories per gram. This higher energy yield comes from its chemical structure—fats are made of fatty acids in triglycerides that are highly reduced, so when they are oxidized in metabolism they release more energy per unit mass than carbohydrates or proteins, which provide about 4 kcal/g each. Alcohol delivers roughly 7 kcal/g, but it isn’t classified as a macronutrient in the same sense. So, fats are the macronutrient with the 9 kcal per gram energy value.

Fat provides the most energy per gram among the macronutrients, about 9 kilocalories per gram. This higher energy yield comes from its chemical structure—fats are made of fatty acids in triglycerides that are highly reduced, so when they are oxidized in metabolism they release more energy per unit mass than carbohydrates or proteins, which provide about 4 kcal/g each. Alcohol delivers roughly 7 kcal/g, but it isn’t classified as a macronutrient in the same sense. So, fats are the macronutrient with the 9 kcal per gram energy value.

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