Which nutrient provides the most energy per gram?

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Prepare for the SkillsUSA Health Knowledge Test. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

Which nutrient provides the most energy per gram?

Explanation:
Fat provides the most energy per gram. The body obtains about 9 kilocalories from every gram of fat because fats have many carbon-hydrogen bonds that yield a large amount of energy when oxidized during metabolism. In contrast, carbohydrates and proteins each supply about 4 kilocalories per gram, so they’re less energy-dense. Fiber is not digested for energy in the small intestine, and any energy from fiber is minimal and variable. So fat is the most energy-dense nutrient.

Fat provides the most energy per gram. The body obtains about 9 kilocalories from every gram of fat because fats have many carbon-hydrogen bonds that yield a large amount of energy when oxidized during metabolism. In contrast, carbohydrates and proteins each supply about 4 kilocalories per gram, so they’re less energy-dense. Fiber is not digested for energy in the small intestine, and any energy from fiber is minimal and variable. So fat is the most energy-dense nutrient.

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